CN1641805A - Controlled inductance device and method - Google Patents

Abstract

Improved inductive apparatus having controlled core saturation which provides a desired inductance characteristic with low cost of manufacturing. In one embodiment, a pot core having a variable geometry gap is provided. The variable geometry gap allows for a 'stepped' inductance profile with high inductance at low dc currents, and a lower inductance at higher dc currents, corresponding for example to the on-hook and off-hook states of a Caller ID function in a typical telecommunications line. In other embodiments, single- and multi-spool drum core devices are disclosed which use a controlled saturation element to allow for selectively controlled saturation of the core. Exemplary signal conditioning circuits (e.g., dynamically controlled low-capacitance DSL filters) using the aforementioned inductive devices are disclosed, as well as cost-efficient methods of manufacturing the inductive devices. Various embodiments of improved gapped toroid devices and an associated methods of manufacturing are also disclosed.

Description

Controlled inductance device and method

The application has required in the U. S. application sequence number 10/882 that is entitled as " controlled inductance device and method " of application on June 30th, 2004,864 and same title in the U. S. application sequence number 10/666 of on September 17th, 2003 application, 580 priority, the application owns together and treats and the U. S. application sequence number 10/381 of unsettled same title in application on March 18th, 2003,062 part continuation application, also required in the priority of the PCT application PCT/US02/29480 of the same title of on September 17th, 2002 application, each is quoted as a reference in this integral body.

Background of invention

1. invention field

The present invention relates generally to the member that uses in the electronic application, especially relate to a kind of filter and separator at Digital Subscriber Line (DSL) or similar telecommunication system, and the improvement inductance device that uses in other equipment.

2. description of Related Art

Today, the installation of Digital Subscriber Line (DSL) is normally as known, be " certainly install ", or especially on each phone, a micro-filter is installed or embedded phone filter (comprises fax with phone the user, telephone answering machine, or the like) place that from circuit and DSL signal path, isolates.Fig. 1 has showed that the typical case of this inline filter installs.

Can be a kind of design of very challenging property from the micro-filter of installing, main because it must have enough stopbands with protection with safeguard the performance of DSL in the DSL frequency band, but it is just passable also should to produce negligible influence to the voice band performance simultaneously.

Fig. 1 a has showed the typical prior art inline filter structure that is used in the DSL application.The Design of Filter of this prior art, yet, often can not satisfy of the requirement of some telecommunication users to return loss and DSL stopband.A major issue is that this is very undesired result for the needed integral capacitor that requires that satisfies the DSL stopband has also produced extra sidetone in the frequency band on phone.In addition, the return loss problem becomes more serious when increasing a plurality of micro-filter for each subscriber phone.

In some country, it is urgent that filter circuit requires.A main challenge, for example, voice band return loss that must can also be very high when providing the stopband of 30KHz.

The inductance device major part of prior art is not suitable for being used in the aforesaid application based on their inductance characteristic usually.As using here, term " inductance characteristic " is commonly referred to as the inductance curve, or conduct is by the variation of function in inductance of the dc electric current of inductance.Fig. 2 a has showed respectively and the relevant inductance characteristic of typical prior art inductance with fixed inductance or variable inductance with 2b.Merit attention and be, in typical case's " fixing " inductor, inductance characteristic 102 is substantially flats or as the constant of current function, till reaching quite high electric current.By comparison, the inductance curve of variable inductor is the same with current function to be changed, or is in the substantially linear mode 106, or is in a little in " soft stride " mode 108, as shown in Fig. 2 b.Fig. 2 b has represented usually by the U.S., Coilcraft Corporation of Cary, and Illinois reaches the prior-art devices model that other corporate system is made, for example DT1608 series SMT power inductor.

Fig. 3 has showed the structure of above-mentioned Coilcraft device.Just as shown in Figure 3, device 300 comprises the two-piece-dress core 302 with pedestal 304, and described pedestal has an off-centered post 306.Last central block 308 has a diameter than post 306 to exceed a lot of aperture 310.Arrange to have created like this to be actually in the outer surface of post 306 and the inner surface continuous variable slit in aperture 310, this slit changes to the maximum at the reverse diameter of the most close point from the minimum slit near two surperficial closest approaches.There are at least two shortcomings in this continually varying slit, comprise: (i) one changes continuously or the inductance characteristic of " soft stride ", be not expect in some applications or be not best, (ii) manufacturing cost height has accurately relatively that two central blocks of tolerance (comprise the accurate adjustment of central block 308 and pedestal 304 owing to must provide.In addition, do not consider the tolerance of off-center post 306 and another central block oneself, also existence and the so relevant fringe cost of newel of manufacturing.This off-centered arrangement does not benefit usually yet uses well-known correction auxiliary equipment, for example the split pin device of describing subsequently here.

During some is used, comprise for example DSL filter circuit (for example being used to call out the ID function) of the higher stopband loss of some needs, require to have the inductance device that is different from Fig. 2 a or 2b inductance characteristic.In the described in front calling ID function situation, need higher stop band loss to call out the ID device at hook state and avoid overload current by the DSL signal with protection.Consider at the common unsettled exemplary filter circuit of in the PCT application number PCT/US01/45568 that is entitled as " high-performance micro-filter and separator " of application on November 14 calendar year 2001, describing, and transferred the assignee about this point, quoted as a reference in this integral body.In this circuit, removing of most of electric capacity reduced filter stop loss during hook state, thereby such just as described previously, forces an additional or alternative to be used to improve this stop band loss.

Similarly, for publishing in April 3 calendar year 2001, the U.S. Patent number 6 that is entitled as " blocking-up filter circuit ", 212,259 and other patent in the illustrative filter circuit described, also transfer the assignee about this point, a kind of improved inductance device that need be used for a plurality of filters provides enough inductance thus allowing circuit by the on-hook stop band loss, and also allows off-hook electric capacity greatly simultaneously.

In addition, in order to control inductance performance, used the clearance-type annulus.In being entitled as of on September 13rd, 2000 application " advanced electronic microminiature coil and manufacture method " and publish Application No. 09/661628 on November 4th, 2003, U.S. Patent number is 6 now, 642, disclose the microelectronics coil device that comprises an anchor ring core and a plurality of windings in 847, winding is wherein separated by one or more layers insulating material.Insulating material is left on first group of winding top and before next group winding is wrapped with core by vacuum and solidifies.The anchor ring core also can randomly be provided for the saturation that core is controlled in a controlled thickness gap.

Be entitled as " magnetic wire core that in the gap, has tape " in publication on April 22nd, 1980, people's such as Aldridge U.S. Patent number is 4,199,744, disclose the ferrite core face portion with two radial prolongation gaps, described gap is by ring surface part ground expansion minimizing EMI.Within each gap, insert an insulation shim liner with the magnetic metal band that is stacked on the shim liner.When electric current put on winding on the core, the resultant flux amount was introduced into tape and around described slit.In the loss of described band medium-high frequency excitation vortex flow is very high and but winding has low reactance-resistance ratio has high inductance.When high winding current, tape is saturated, and inductance is reduced and the Q value of winding improves.In the switching voltage adjuster, this inductor often produces only a spot of ring and electromagnetic radiation noise.

Except the inductance performance characteristic of expectation, also catch at very much for the manufacturing low cost of inductance device.Inductance device market (and DSL filter circuit market) is that distinctive extremely has price competitiveness; Thereby, even the little improvement of the minimizing on cost efficiency or the price at these parts also can produce tremendous influence to the survival ability of producer's product.Because with the relevant work that increases of inductance characteristic and/or the parts that produce expectation, the method for the control device inductance of prior art is complexity and the relative high manufacturing cost of requirement normally.

Plate and inner space loss also are the problems (comprising the DSL filter circuit) with many electronic installations; Therefore except the performance characteristics and low cost of expectation, minimum physical size and area occupied also are in demand.Electronics is carried out fine and is made cheap device, but takies suitable plank or inner space, usually commercial be infeasible.

ETSI technical standard 952, part 1, subdivision 5 (ETSI TS952-1-5) is entitled as " transmission filter of access network XDSL; Part 1:ADSL filter is used for Europe to be disposed; Subdivision 5:ADSL/POTS distribution filter standard " stipulated to be used for the local exchange end DSL distribution filter and that be installed in local loop and near the demand and the method for testing of the distribution filter on the user side of network termination point (NTP).This standard code be used for distributing the demand and the method for testing of correct ADSL/POTS distributed filter at the user side of local loop.Each bar standard, on-hook voice band electrical equipment requires to comprise two conditions: (i) the DC feedback voltage of a 50V and use impedance mode Z _ONThe DC loop current that (10k), or (ii) flows through distributed filter arrives between the 2.5mA scope at 0.4mA; With use 600 impedance mode on speech frequency, to stop the LINE and the POTS port of distributed filter.The on-hook ADSL frequency band electrical equipment of standard requires to satisfy and to use impedance mode Z with the DC feedback voltage of 50V _ON(10k).Off-hook electrical equipment requires and can satisfy to the DC electric current of 80mA with 13mA.These requirements are more urgent, particularly simple low-cost inductance device.

Based on before described, need an improved inductance device to be used in Digital Subscriber Line (DSL) signal and other signal with inductance characteristic of low manufacturing cost and expectation.Improved like this device has (i) has expectation in on-hook and off hook state inductance feature ideally, so that support for example to call out (ii) this loss of the higher on-hook stop band loss of ID functional requirement is the manufacturing of expensive efficient, (iii) reliable, and (iv) volume and area occupied are had physical influence.

Brief summary of the invention

The present invention by provide one be suitable for use in DSL filter circuit for example in using the improvement inductance device and manufacture method in satisfy aforementioned needs.

Of the present invention aspect first, disclose one and be used for the improvement inductance device that uses at electronic circuit.This device generally includes the magnetic infiltration core with controlled saturation parts, the collaborative inductance characteristic (for example, relative with the dc current curve basically " stepping " or discrete inductance) that produces expectation of this core and parts.In an exemplary embodiments, it is columniform potentiometer (" kettle ") core basically that this device comprises what have the first core parts and the second core parts, and it has the gap that is formed on the shape-variable between the described at least core parts part.The gap of described shape-variable comprises for example, having the first of first gap width and second adjacent part with second gap width.The gap of shape-variable helps to be controlled at the saturation of different current value devices, thereby the inductance characteristic of stepping basically is provided on interested frequency band.The terminal matrix of integral body or separation also is provided, and it is used to be electrically connected this and installs external component such as printed circuit board (PCB).

In second example embodiment, modifying device of the present invention comprises " two " magnetic drum core that single or many parts with first and second end fittings twine, and wherein controlled core saturation parts are placed in the periphery of all or part drum type end fitting.Controlled saturation parts comprise that in an example structure, ferronickel (Ni-Fe) is with slice.Rely on the part of its iron content, this material comprises with magnetic and rouses the interactional magnetic domain of core thoroughly so that aforesaid stepping inductance characteristic to be provided.

In the 3rd exemplary embodiment, improved inductance device comprises " tlv triple " drum core with first and second end fittings, and places a central module between these terminals.The Ni-Fe type is commonly used to bridge joint between at least a portion and central module of two end fitting peripheries.

Aspect second of the present invention, an improved DSL filter apparatus is disclosed.Filter apparatus generally includes the DSL filter circuit that has merged one or more aforementioned electric induction devices, thereby is suitable for strengthening Stopband Performance.In one exemplary embodiment, filter circuit comprises the dynamic switch filter circuit that is suitable for reducing shunt capacitance, and thereby allows many distributed filters to be used in the given telecommunication circuit and can not produce the low return loss of not expecting.Aforesaid kettle core and/or twin drum core apparatus are used to be provided at the input inductance that increases during the hook state.

Aspect the 3rd of the present invention, the circuit board composite set comprise have a plurality of conductive tracks and the peace thereon one or more aforementioned electric induction devices substrate (for example PCB).In one exemplary embodiment, aforesaid DSL filter circuit is distributed on the substrate, thereby provides and edge plug combination DSL filter " card " together.

Aspect the 4th of the present invention, disclose by using inductance device that a kind of improved method of controlled inductance is provided.This method comprises usually: an inductor with core and controlled saturation parts is provided; The parameter of selecting controlled saturation parts with provide (i) during no current state than higher inductance; (ii) non-zero and during current status on the given current threshold lower inductance; And this device of operation within the circuit that can produce no current by this device and non-zero current state.In one exemplary embodiment, select the behavior of parameter to comprise to select material, thickness and for the shape of the controlled saturation parts of controlling its magnetic saturation.

Aspect the 5th of the present invention, the method for making inductance component is disclosed.In one exemplary embodiment, this method comprises usually: first core components and second core components that are suitable for mating are provided; The first that is formed on the slit between first and second parts is configured to first width; The second portion in slit is configured to second width; Twine described core with lead; And assemble first and second parts.In second exemplary embodiment, this method comprises usually: the bulging core with first and second end fittings and coil region is provided; On coil region, twine at least one lead; And use controlled saturation parts bridge joint first and second end fittings.In the 3rd exemplary embodiment, this method comprises: provide the bulging core with first and second end fittings, a central module and at least one coil region; On at least one coil region, twine at least one lead; And use at least one controlled saturation parts bridge joint the one the second end fitting and central modules.

Aspect the 6th of the present invention, an improved controlled inductance device (relevant with manufacture method) is disclosed.This device comprises usually: a magnetic infiltration core components; Place at least one winding on the above-mentioned core components; Basically be placed at above-mentioned at least one winding major part cap member on every side; With an inductance control assembly, core components and above-mentioned at least one winding of placing near above-mentioned cap.In one exemplary embodiment, this device comprises vertical direction drum type core, and at least one bifilar winding is arranged thereon.This bulge contains an essential part, and this essential part receives a plurality of conduction terminals (for example PCB) that are used to be loaded on the female equipment, this mother's equipment and bifilar winding separately one be electrically connected.Controlled inductance component comprises a nickel (Ni) alloy bar, and this places among the cap volume basically and catches between cap and essential part, thereby an additional inductance path is provided within this device.The inductance characteristic (just a plurality of trap frequency) that provides by exemplary device satisfies or has surpassed relevant performance standard, for example ETSI TS 101 952-1-5 distribution filter standards.

Aspect the 7th of the present invention, an improved slit anchor ring (relevant with manufacture method) is disclosed.This device comprises usually: magnetic infiltration gap anchor ring core components; Place at least one winding on the core components; Non-anchor ring magnetic infiltration parts with bridge joint core components slot arrangement.In one exemplary embodiment, described magnetic infiltration parts comprise permalloy and are partly placed within the slit with insulating element.During operation, slit electric current " rotation " anchor ring inductance; The permalloy parts are saturated, thereby effectively remove the inductance of this device.In another embodiment, described core slit is crossed by the permalloy band, and wherein said core and bar are trapped among within the outer covering (for example pyrocondensation pipeline) basically.

In another embodiment, anchor ring slit device and the saturation control assembly coupling that comprises anchor ring metallic plate or " packing ring " basically.For provide magnetic coupling pass through the core slit expecting degree, the end face of packing ring and device and/or bottom surface coupling.Can control the thickness of packing ring and near electrical equipment and the inductance characteristic of core degree, and very low cost solution is provided with the expectation of generator.

The accompanying drawing summary

In the detailed description that proposes from below in conjunction with the accompanying drawings, characteristics of the present invention, it is more obvious that purpose and advantage will become, wherein:

Fig. 1 is the block diagram of the DSL of the typical prior art of installing in family expenses or small commercial environment, comprises the micro-filter in the many phones expansions of being installed in of prior art.

Fig. 1 a is the schematic diagram of prior art DSL micro-filter shown in Figure 1.

Fig. 2 a is the diagram of the inductance of the dc current characteristics (" inductance characteristic ") with respect to typical fixed inductance prior-art devices.

Fig. 2 b is the diagram of the inductance characteristic of typical variable inductance (linear and " soft stepping ") prior-art devices.

Fig. 3 is the top plan with exemplary prior art inductance device (Coilcraft) of variable inductance characteristic.

Fig. 4 is the perspective view according to first embodiment of the improved kettle core inductance device with controlled saturation of the present invention.

Fig. 4 a is the sectional side view of Fig. 4 inductance device along line 4-4.

Fig. 4 b is the bottom plan view of the first core parts of Fig. 4 inductance device, illustrates the slit of shape-variable.

Fig. 4 c is with respect to the schematic graph of the inductance of dc electric current for the inductance device of Fig. 4.

Fig. 4 d-4f has showed another alternative embodiment in inductance device shape-variable of the present invention slit, has showed (i) three layered suture cracks respectively; (ii) concentric double-deck slit; The (iii) use in Jian Xie concentricity double-deck slit.

Fig. 5 is the perspective view that rouses first embodiment of core inductance device (unicoil) according to the improvement with controlled saturation of the present invention.

Fig. 5 a is the perspective view of first alternative embodiment of the bulging core apparatus of the present invention with a plurality of controlled saturation parts.

Fig. 5 b be second alternative embodiment of the present invention with the bulging core apparatus that is used for the continuous basically sheet of controlled saturation parts profile.

Fig. 5 c is the perspective view of the 3rd alternative embodiment of the bulging core apparatus with L-type terminal attached to the drum in-core of the present invention.

Fig. 6 is the perspective view of first embodiment that has the improvement drum core inductance device (multi-thread circle) of controlled saturation according to the present invention.

Fig. 7 is to use the present invention to improve the schematic diagram of the first embodiment filter circuit of inductance device.

Fig. 8 is to use the improved inductance device of the present invention, has utilized the schematic diagram of the second embodiment filter circuit of the twin coil drum core apparatus of Fig. 6.

Fig. 9 is the schematic diagram of Fig. 8 filter circuit, comprises optional the 3rd rank filter.

Figure 10 a is the logical flow chart of exemplary method that illustrates the kettle core inductance device of shop drawings 4-4f.

Figure 10 b is the logical flow chart that illustrates shop drawings 5-6 drum core inductance device.

Figure 11 is the top perspective according to first exemplary embodiment of controlled inductance device of the present invention, the part exploded view.

Figure 11 a is the side sectional exploded view of Figure 11 device.

The top plan of another embodiment of Figure 11 b controlled inductance parts of the present invention has showed that variable bar is wide.

Figure 11 c is the decomposition diagram of another embodiment of controlled inductance device, has a plurality of inductance components.

Figure 12 is the logical flow chart that illustrates the exemplary embodiment of Figure 11 device producing method.

Figure 13 is the top orthogonal view of an embodiment in anchor ring of the present invention slit.

Figure 14 is the exploded view (not having winding) in the exemplary anchor ring of Figure 13 slit, shows slit wherein and the parts of placing therein.

The side vertical view of Figure 14 a Figure 14 anchor ring slit device.

Figure 14 b is the exploded view of second exemplary embodiment in anchor ring slit (no winding), has wherein used " V " groove part crack.

Figure 14 c is the exploded view of the 3rd exemplary embodiment in anchor ring slit (no winding), has wherein used truncated " V " groove part crack.

Figure 15 is the logical flow chart that illustrates an exemplary embodiment of Figure 13-14c device producing method.

Figure 16 is the exploded side view of another embodiment of anchor ring of the present invention slit device.

Figure 16 a is the exploded side view of another embodiment of anchor ring of the present invention slit device, has wherein used the thermal contraction coating.

Figure 17 a is the perspective exploded view of another embodiment of the present invention, and wherein the belt control assembly in plane is used for being connected with anchor ring slit core.

Figure 17 b is along the profile of Figure 17 a device of line 17a-17a, has showed structure wherein.

Figure 17 c is the profile of another embodiment of this device, has showed the use of curve (hemisphere) packing ring and complementary core.

Figure 17 d is the profile of another embodiment of the present invention, and wherein two plane control parts place on the opposing face of anchor ring.

Figure 17 e is the perspective exploded view of another embodiment of the present invention, and wherein the on-plane surface control assembly is used for being connected with anchor ring slit core.

Figure 17 f is the top perspective exploded view of another embodiment of the present invention.

Detailed description of preferred embodiment

With reference now to accompanying drawing,, wherein all identical numerals refer to identical part.

Just as used herein, term " signal conditioning " or " condition " are understood to include, rather than limit, signal voltage conversion, filtering and noise removing, Signal Separation, impedance Control and correction, electric current restriction, electric capacity control, and time delay.

As here using, term " Digital Subscriber Line (or " DSL ") is interpreted as arbitrary form of DSL structure or service; no matter symmetry or other; these forms comprise unconfined what is called " G.lite " ADSL (for example meeting ITU G.992.2); RADSL:(adaptation rate DSL); VDSL (very bit rate DSL); SDSL (symmetrical DSL), SHDSL or superelevation bit rate DSL, be also referred to as G.shdsl and (for example meet the ITU suggestion G.991.2, pass through in calendar year 2001 February by ITU-T), HDSL:(high data rate DSL), HDSL2:(second generation HDSL), and IDSL (integrated services digital network DSL), also have In-Premises telephone line network (for example HPN).

Though it is relevant with one or more aspects of exemplary embodiment of the present invention to recognize further that term " family " and " user " can be used in here, the present invention never limits these application.The present invention can successfully be applied in equally, little or large-scale commerce, industry and if desired, even be applied in the military affairs, or the like.

Though it should be noted that the present invention can be used in combination with the different model connector of arbitrary quantity according to the part of the following description of arranging in the relevant standard plug of the well-known RJ-type of field of telecommunications connector and model.Therefore, following discussion only is the example of broad notion.

In addition, here the term of Shi Yonging " website " and " user site " should comprise any position (or set of locations) with the Telecommunication Lines business that is provided to the there, are not limited to residential building, apartment, office, and firm.

At last, as here using, term " expanding unit " means the telecommunication installation that comprises with any model of existing Telecommunication Lines compatibility, and is not limited to black phone, telephone answering machine, facsimile machine, wireless or satellite receiver, and multi-line telephone.

General introduction

The present invention has effectively solved and can efficiently become the local inductance characteristic of inductance device of working out so that the two or more problems of discrete inductance value basically as the dc current function to be provided, in the exemplary environments of family or user DSL filter circuit, this discrete basically characteristic permits being used for filter when the hook state than high input impedance.When being coupled with the dynamic switch filter circuit, the high stop band loss of low shunt capacitance and expectation advantageously provides in single circuit.Also compact on improvement inductance device manufacturing cost efficient height of the present invention and the space.

Be described though can recognize the use improvement of the present invention inductance device of main basis in the DSL circuit, the application of such inductance device can exceed the DSL circuit and comprise that any needs on the letter have the circuit of the characteristic inductance device of describing here.Therefore, scope of the present invention should be determined by claim, be not the exemplary embodiment of being set forth by here.

Improved inductance device

With reference now to Fig. 4-4f,, describes the various exemplary embodiments of the improved inductance device of the present invention in detail.Those of ordinary skill will recognize that the embodiment that describes only provides the example of controlled saturation inductance device broad notion here, and this device is efficient cost to manufacturing, and can produce the inductance characteristic of expectation.The variation (having described some here) of many different physical structures can consistently with the present invention be used.

Shown in Fig. 4 and 4a, illustrate first embodiment of inductance device 400, in this embodiment, device 400 comprises potentiometer usually or has design and is used for mutually two parts 402a of coupling, " kettle " core 402 of 402b.These two parts 402a when engaging, 402b shape in the present embodiment is column type basically, and each forms channel or groove 408a, the post 406a at the center that is positioned over of 408b, 406b around being included in it.Should be realized that, yet other core pattern (comprise for example known " E " core pattern, it is effectively two " E " types in mirror image is disposed, perhaps " U " core design) can as one man be used with the present invention.Groove 408 provides inner volume, therein the winding of arrangement 410.Each parts 402 is formed by the saturating material of magnetic, and Mn-Zn for example is as known at electronic applications.Aperture 409 forms (at two parts 402a, the interface point place of 402b) to allow advancing/going out of lead in the side of core components.Significantly, can use other the mechanism that is used for lead and advances/go out, comprise and pass wicking surface top or bottom or the like.In addition, some core pattern (for example aforesaid " E " core) is opened by design, thereby the exit point of lead is provided inherently.

Inductance device 400 comprises that also the lead that twines required form by the newel 406 at core 402 forms one or more conductive winding 413.In this exemplary embodiment, used, because its existing low relatively cost also has good electron and mechanical performance at the known model of electronic applications so-called " magnet-wire ".Magnet-wire twines transformer and inductance device usually, and by thin polymer insulating barrier or polymeric layer compound for example comprises polyurethane, polyester, polyimides (aka " Kapton ^TM") or the like the line formed of the copper that covers or other inductive material.Tectal thickness and compound have determined the dielectric strength ability of line.Most of magnet-wires in 31 to 42AWG scopes are used in microelectronic transformer or the inductor application usually, although other size may be with in some applications.

The inductance device 400 of Fig. 4 also may comprise terminal matrix 425 alternatively, and it to external device (ED) for example is used to connect aforementioned winding, PCB pad or vestige.Here the inductance device of disclosed model is placed at usually such as on the PCB substrate and place on its surface, and low profile and low installation cost are provided easily.Terminal matrix 425 comprises non-inductance matrix structure 427 and a plurality of separately terminal of flattened cross-section basically 429, and this terminal is separated between mutually by matrix structure 427.For each or each self terminal, end at the free end of inductance device winding 413, for example be wrapped on the groove that forms on the end of terminal 429 (not shown)s by soft soldering and/or line.The bottom part 431 of each terminal 429 is suitable for mounted on surface (for example soft soldering) to corresponding PCB contact pad (not shown) or other similar inductance analog.The core 402 of inductance device 400 is positioned on the top of structure 427, and can be mounted thereto by the different any known method that uses adhesive on the lower surface of the second core components 402b or other quantity.

Interchangeable as another, terminal 429 directly within mounting core 402 (not shown)s or on, like this by frictionally and/or gluingly they being embedded into core components 402a, in the aperture in the 402b, and stop the free end of winding 413 then there.Be used for terminal and its installation (or directly or indirectly) numerous other structures to core 402 are present in, for example in known ball grid method, or many pins (for example being used in the pin-grid array), alternative like this structure can be recognized by those of ordinary skill at an easy rate.

At each core components post 406a, 406b, the apparent surface between zone 414 comprise " variable " shape, the latter's design is for required inductance characteristic (following described about Fig. 4 c) is provided.Especially, in the fine illustrated embodiment of having showed, this shape-variable comprises that two place the zone 416,418 between the post 406 in Fig. 4 a, and each zone has different gap widths (" bilayer ").And the first gap width W of first area 416 nearly 0.010 inch (0.254 millimeter) ₁, and second area 418 has the gap width W of about 0.001 inch (0.0254 millimeter) ₂, W ₂Less than W ₁When watching by plane graph (Fig. 4 b), these two zones 416,418 comprise two adjacent parts that are formed at whole post 406 hatch regions substantially.In the present embodiment, first area 416 comprises whole surface area about 90% in post 406 cross sections, and separate from second area by string limit 419 in this zone.Second area 418 approximately comprises area of section remaining 10%.In this exemplary embodiment, this slit (a plurality of slit) is filled air; Yet, will appreciate that and can use one or more other materials with desirable characteristics.For example, the magnetic resistance compound of high magnetic can be filled up so that further control the inductance curve of core in described slit.

Usually, in the DSL filter applies, saturated by the off-hook dc loop current in telephone wire in order to stop core, series reactor core (a plurality of core) must have one the space.Yet, in hook state, do not have the dc loop current.By realizing above-mentioned multizone void shape, the inductance device of Fig. 4 provides " stepping " inductance characteristic of expectation.What especially, the on-hook inductance value of inductor was similar becomes than the big 2-10 of off-hook value times (depending on selected parameter, just as discussed below).When indivedual phones or other expanding unit off-hook relevant with filter circuit, the width W of above-mentioned second area 418 ₂Be enough little so that can allow to have the saturation of the core of main off-hook dc loop current.This falls into desired off-hook value with regard to the inductance that has caused this device.As what will be understood that, W ₁And W ₂Value, and the relative distribution of first and second zones, 416,418 areas of section helps to determine specific off-hook inductance value, and the shape of " stepping " inductance characteristic.In current environment, provide the inductance value (that is to say for on-hook and off hook state) of two step characteristics to produce two expectations.

Fig. 4 c illustrates the inductance characteristic 450 relevant with Fig. 4 exemplary device.As shown in Fig. 4 c, this characteristic has a first 452 with inductance value (when low dc electric current passes through device) of higher relatively and substantial constant, one has the second portion 454 that reduces the perpendicular of inductance along with the rising of dc electric current, third part 456 with inductance low relatively when higher dc electric current (also substantial constant), with one the 4th part 458, it is saturated fully wherein to install core.First 452 has represented and has produced very little or do not have a saturated dc current value of core and the higher inductance during corresponding to hook state in exemplary DSL filter circuit.During the second portion 454 of curve 450, core begins saturated, and along with the inductance that increases of dc electric current has rapid (precipitous) whereabouts.This sharply fall with along with saturated this part increasing of electric current and the magnetic density of passing through small gap that increases is relevant, or the like, this part effectively carries out electromigration to it and removes from circuit.Even along with further the increasing of dc electric current, the core saturation, and device further enters into the third part 456 of curve 450.Here, along with increasing of electric current, the inductance substantially constant, through to zone of saturation 458.With the inductance that reaches in the first, the second and the 3rd zone 452,454,456 relatively, in case that core reaches is saturated fully, inductance drops into very little value once more fast.

It should be noted,, also can use other arrangement in performance for the electricity that produces expectation though the embodiment of Fig. 4 has used two-area arrangement of newel.For example, in an alternative embodiment (Fig. 4 d), add the field of conjugate action of the 3rd zone 470, thereby in inductance characteristic, increased the 3rd rank (" three layers ") to stem stem 406.In another alternative embodiment (Fig. 4 e), slit area two-layer or regional 416,418 constitutes concentrically with respect to one another, has like this than small gap W ₂Second area 418 around having big slit W ₁First area 416 around.The wall that control is relevant with second area 418 or the thickness D of anchor ring 474 ₁So that the inductance characteristic of expectation to be provided.In addition, described wall or anchor ring 474 can reduce gradually as the function of vertical height, so for example approach slit W ₂Its width D ₁Less than at the width that is higher than the point on the slit.Can (perhaps interchangeable) make discontinuous anchor ring 474 in addition; For example, use along its one or more zones of circumference to punctuate, increase in the slit on its circumference, for example realizing by removing of material in these zones as shown in Fig. 4 f.

Aforesaid concentric arrangement also has been convenient to the use of center adjusting device, for example be to announce on September 14th, 1999 be entitled as " blind hole pot core device for transformer " and transfer Pulse Engineering, the U.S. Patent number 5 of Inc, 952, the split pin arrays of openings of describing in detail in 907 all is included in here as a reference at this.This arrangement used in each the newel that is formed on first and second core components a cover center bore and before core is joined in commentaries on classics in one of aperture the opening friction pin of reception.When the combination core components, receive the free end of split pin within the aperture that does not get clogged in other core components, thereby adjust two core components accurately.

For newel 406 many other different structures is possible, has manyly produced different inductance performance characteristics.In addition, discuss as previous theory, the difform slit of illustrated embodiment is arranged and can be applied at an easy rate in other cored structure, for example comprise " E " and " U " core.

The embodiment that should be realized that Fig. 4 a-4f can low cost make, this be since (as below in greater detail) they can use useful at an easy rate or " need not customize " low-cost gyalectiform iron core, this core is as described can simply the modification so that the inductance characteristic of expectation to be provided here.Because difform slit is completely contained within the device inner volume, therefore, these devices advantageously no longer require than traditional gyalectiform iron core more space.

With reference now to Fig. 5,, second exemplary embodiment of improvement inductance device of the present invention has been described, in this embodiment, used drum (or bobbin) core 502 that typically is known in the art in conjunction with controlled saturation parts 508.Drum core 502 comprises centerline axis zone 504 and two end fittings (for example flange) 506a that is distributed on spool areas 504 ends, 506b.Spool areas 504 comprises winding 510, and this winding is wrapped in around the bobbin concentrically.As in Fig. 4 embodiment, core 502 is made of the saturating material of magnetic.Although be appreciated that to be replaced by many cores, in order to reduce cost, or, other reason, the core 502 of illustrated embodiment textural be single-piece.The controlled saturation parts 508 of graphic display unit comprise thin (about 0.001 inch, or 0.0254 millimeter, thick) elongated band of Ni-Fe (Ni-Fe) alloy, and this alloy is vertically arranged along core 502, so as two end fitting 506a of its energy bridge joint, 506b.In the present embodiment, parts 508 glue together by adhesive or are bonded on two end fittings 506.Because (i) because iron content it be magnetic saturating (and conduction), and (ii) because nickel content and physics is reinforced and enough hard, so select Ni-Fe to be used as controlled saturation parts 508.Although can be replaced by other alloy based on desired characteristics, illustrated parts 508 has 80% nickel and 20% iron is arranged.For example, can use the nickel and the iron of different weight percentage.Interchangeable, dissimilar alloys for example Ni-Fe-Cr (being commonly referred to be Inconel) or so-called " stainless steel " (mainly be Fe-C-Cr, or martensitic or other) may be by separately or be used in combination.Contain a passivation that advantage is parts 508 of chromium, thereby eliminated the influence of the iron degradation mechanism that comprises ferriferous oxide form (" iron rust ") and etch state greatly.

Controlled saturation parts 508 may advantageously be configured to the band in big thin slice, comprise as the previous application that is glued to the there in the more detailed description below, thereby because their existing serviceabilities are convenient to easily and cost is made effectively.

The cross-sectional view and the thickness that will recognize that controlled saturation parts 508 can influence the saturated point of device generation, also can influence the relative inductance value for different electric currents.Therefore, though use about 0.001 inch (0.0254 millimeter) thick flat rubber belting in the illustrated embodiment,, also can use other thickness and/or cross-sectional view.For example, can expect to utilize one or more circular sections basically alloy wire (not shown) as controlled saturation parts.

It should also be understood that in the one or more controlled saturation parts 508 that on setter, use can materials used composition.For example, device 500 can be with placing two or more around the device to equip than minor diameter band 508, thereby (see Fig. 5 a) at two end fittings 506 of a plurality of positions bridge joint.

Interchangeable as another, can replace with the one or more serialgrams of alloy " band " 561 and be with 508 shown in Fig. 5, the extension of this alloy " band " part or be centered around fully each end fitting 506 around (Fig. 5 b).The heat-shrinkable tube 563 of the known model in this area (for example by the Raychem Corporation of Menlo Park, CA makes) can use replacement alternatively or add that aforesaid adhesive comes efficient cost and the saturated parts 508 of lasting pressure welding to rousing core end 506.Other connecting scheme is fine, and comprises brazing/location welding, soldering, clamp or the like.

Interchangeable as another, can use synthetic saturation parts 508, discrete basically, parallel or folding up and down band has for example been formed in the use of can interosculating of wherein two or more different alloys.

Do not have suitable controlled saturation parts 508, the inductance of core 502 (and whole device) is mainly determined by the space between end fitting 506.Yet by using suitable saturation parts 508, the space between terminal 506 is bridged, thereby improves the inductance of device 500 when low or no current state (for example on-hook) basically.Yet when connecting the expanding unit off-hook of inductance device 500, the dc electric current raises, thereby has increased the flux density at thin parts 508.This has caused parts 508 saturated fast, thereby has reduced the inductance (" stepping ") of device basically.

The inductance device 500 of Fig. 5 can comprise alternatively that also for example being used for the above-mentioned aforementioned winding of describing about Fig. 4 is connected to terminal arrays such as the external device (ED) of PCB pad or vestige.Alternatively, terminal 529 can directly be installed to the inside of core or outside (as shown in), like this by friction and/or gluedly they are embedded in the aperture 535 of core components 502 into, and stop there the free end of winding 413.Referring to the replaced embodiment of Fig. 5 c, wherein rouse core and comprise the recess 588 that is suitable for receiving L-type terminal 586 again.The free end 580 of terminal winding 513 is placed within the recess 588 and ends at terminal 586 to permit electricity.Being used for terminal and their installs (or directly or indirectly) and has for example known spherical grating array approach, or pin (for example being used in the pin-grid array) to many other structures of core 502.Those of ordinary skill is recognized interchangeable like this structure at an easy rate.

As the embodiment of Fig. 4, because major part makes and is used for the simplification of device of control device inductance curve, the cost of the inductance device of shop drawings 5-5c is very efficient.This is different from complicated (and expensive) prior-art devices that is used to provide the customization inductance characteristic.

With reference now to Fig. 6,, another embodiment of improvement inductance device of the present invention has been described.In this embodiment, device 600 comprises and has the first and second parts 602a, the twin drum core 602 of 602b and place two central modules (for example flange) 605 between the end fitting 602.Each of two spool areas 604 offers and comprises one or overlap concentric winding winding 610 more.Along axle single controlled saturation parts 608 of vertical placement of 611 of device and with three parts 602a, 602b, each of 605 connects, thereby bridge joint is formed on two spaces between the there.

Yet, should be realized that two discrete saturation parts 608 (not shown)s can be used to two spaces of bridge joint dual-spool core 602.In addition, above-described single spool drum core about Fig. 5 can have various alternative structures, for example uses different-alloy, band continuously, and many saturations parts or the like can be applied to the dual-spool core of Fig. 6 in the same manner.

Filter circuit is described

With reference now to Fig. 7-9,, the improvement filter circuit that utilizes above-mentioned inductance device is disclosed.Just as discussed previously, inductance device of the present invention has solved the inductance characteristic of efficient cost establishment inductance device so that the two or more problems of discrete inductance value basically as the dc current function to be provided.In the exemplary environments of family or user DSL filter circuit, this discrete basically characteristic takes into account the obvious higher input inductance of the filter that is used for when hook state.When being coupled with the dynamic switch filter circuit, example as described in Figure 7, the high stop band loss of low shunt capacitance and expectation advantageously provides in single circuit.In other words, improvement inductor of the present invention, when combining with the dynamic filter circuit of Fig. 7, provide one low-impedance filter to be provided and to provide the single filter circuit of high-impedance filter, also advantageously kept the frequency cutoff performance of identical (or similar) at hook state at off hook state.Therefore, created synergy by the combination of these two parts (that is to say " stepping " inductance device and dynamic switch filter circuit).When inductance device of the present invention combines with Fig. 8 and 9 filter circuits,, provide fabulous Stopband Performance with extremely low cost by in the combination of other Fig. 6 or the use of dual-spool inductor device.

With reference now to Fig. 7,, first embodiment with dynamic micro filter ripple device structure of improving inductance device has been described.Should be understood that, though the embodiment of Fig. 7 comprises the exemplary design that is suitable for satisfying instructions for use in a plurality of countries with some performance requirement, Britain (UK) for example, but select and configuration by correct member, dynamic filter of the present invention can be suitable for accurately using in any application equally., be easy to determine such alternative application and cooperation for those of ordinary skill based on existing disclosure, therefore, here do not further describe.

Should also realize that, though (that is to say according to being used for a plurality of discrete electrons parts of built-up circuit, resistor, inductor, capacitor, switch, or the like) when drawing following discussion, but the part of circuit can be implemented with the form of combining integrated component (for example integrated circuit) or having other model parts of expectation function and electrical characteristics.

Just as shown in FIG. 7, filter circuit 700 comprises the importation 702 of (line side socket) 704 and two input inductors 706,708 that have a plurality of input terminals usually.In the present embodiment this two input inductors 706,708 each all comprise a previous controlled saturation inductor of describing model here.This just provides the circuit with expectation input inductance characteristic with previous discussion.Output 720 comprise two additional electrical sensors 724,726 (L3, L4) three electric capacity 727,228,730 (C4, C9, C6).(L1 L2) 706,708 be connected to line side socket 704, and the electric capacity importation 720 of filter is connected to the phone side socket 740 of filter to the input of filter " stepping " inductor.Circuit and phone side socket 704,740 though be the modularization socket of the general type of use in telecommunications is used, it should further be appreciated that the modularization connector and the connector that can be replaced by other type.Filter 700 further comprises DSL socket 750, and in the illustrated embodiment, this socket comprises a RJ-11 type DSL socket, although other also can be replaced.DSL socket 750 directly leads to line side socket 704 (connector) with DSL or home phone network (HPN) socket that facilitates by electronics path 752.

The primary filter that provides by Fig. 7 circuit be by two input inductors 706,708 (L1, L2), two output inductors 724,726 (L3, L4) and three bridge joint electric capacity 727,728, the oval low pass filter of the level Four that 730 (C4, C9 and C6 divide other) form.Input inductor 706,708 provide the input inductance characteristic of expectation and have prevented load on the DSL circuit, though two electric capacity 734 in importation 720,736 (C1, C7) (L3 is L4) to be created in the resonance on the 30KHz rank to be added to output inductor 724,726, but it should also be understood that in order to obtain other resonance frequency and can select other reactance and capacitance.Correspondingly, the embodiment of Fig. 7 is a level Four elliptic filter that produces rapid 30KHz burble point.This ellipse stopband feature permit such design with minimum overall electric capacity to common＜40nF off-hook and 5nF on-hook (that is to say＜40E-09 farad off-hook and the on-hook of 5E-09 farad), this has minimized the capacitive effect on the call voice band performance.

Carry out from installing for the multi-filter of each phone in order to make filter 700 mobilism and to take into account by the user, (K1 is K2) to remove the most of filter capacity for on-hook (free time) phone so increase by two reed switches 762,764.In the embodiment of Fig. 7, reed switch 762,764 all magnetically are coupled to two inductors 770 (L5A), be entitled as " modulus of impedance blocking filter circuit " and transfer assignee's U.S. Patent number 6 about this point as what announce respectively at January 30 calendar year 2001 and April 3 calendar year 2001,181, described respectively in 777 and 6,212,259.Especially, the winding coupled that reed switch 762,764 relies on their physics to approach inductor arrives inductor 770, and has therefore produced magnetic field.

Two inductors and two reed switches 762,764 are formed and comprised to inductor/reed switch 766 in the present embodiment by the framework of cylinder.It is obvious to the person skilled in the art that two inductor/reed switch arrangement 766 can replace so that implement identical functions with two single inductors/switch element (not shown).In the illustrated embodiment, reed switch 762,764 along they in fact with the device the parallel longitudinal axis horizontal arrangement of the bobbin longitudinal axis.This structure provide between the winding of inductor 770 and switch aforesaid magnetic coupling with the operation latter.Device 766 is selected at (for example about 6-16mA) excitation on the predetermined loop circuit threshold value.If the loop circuit threshold value is too low, reed switch can vibrate during circuit operation, and can therefore shorten the useful life of switch.On the other hand, if the loop current threshold value is too high, the loop current amount is energizing switch in bad situation condition inadequately.

When not having loop current to flow through (because phone on-hook), just, to open not from the magnetic field and the reed switch 762,764th of two inductance 770, this switch has been opened electric capacity 727,730 (C4 and C6) from circuit interruption.In this embodiment, for each on-hook filter, this total electric capacity reduces to 4.7nF from about 37.7nF.The value of this 4.7nF is to force arbitrary on-hook phone resonance to be lower than the required minimum value of electric capacity of 30KHz.In addition; in order to protect reed switch 262; 264 avoid ringing voltage, power crossover voltage and the infringement of the instantaneous voltage that is exceedingly fast; as as shown in Figure 7; comprise and cross reed switch 762; 764 one or two voltage stabilizing didoes 776,778 (D1, D2) with peak limiting voltage to being lower than 12V.Because electric capacity connects with diode, the single diode 776,778 of illustrated embodiment can gratifying work, and will make single diode self-bias when the AC signal occurs.Replacedly, however aforesaid diode is arranged and is substitutable for two back-to-back 6-12V voltage stabilizing didoes, single voltage stabilizing didoe, or or even low electric capacity rheostat.The structure of such parts and selection, this current purpose of minimum capacity is consistent with providing in device, also is known at electronic applications, therefore, does not here further correspondingly describe.

When reed switch is closed, for the spiking that prevents reed switch 762,764 switch currents by C9 capacitor 728 and C4 capacitor 727 (and C1, C7 capacitor 734.736) (R5 R6) is lower than the minimum current quota of switch with the limit switch electric current with 726,730 series connection of C4 and C6 capacitor, to increase by two resistors 780,782.For the Stopband Performance that does not influence filter is selected enough low R5, the resistor values of R6.

The dynamic component of aforesaid filter 700 improves with an urgent demand of satisfying previous discussion (for example those of Europe/Britain's standard) also not exclusively enough to enough return loss is provided.In order to address this problem, by two inductor 770 (L5A, L5B), parallel network capacitors 790,792 (C2, C3), correct circuit with the resonance impedance that parallel network resistor 794,796 (R4 and R1) constitutes and improve voice band return loss to 10db by in the 2-3KHz frequency band, increasing positive phase of impedance.(L5A L5B) realizes dual purpose to two inductors 770; Just as discussed previously except driving the reed switch during off-hook, two inductors 770 (with network capacitors C2, C3 790,792 combinations) have also been formed the differential resonance impedance of connecting with the circuit input.(R3 R4) is restricted to this impedance greatly about 700 ohm of resonance parallel network resistor 794,796, and this also has been restricted to receivable level (that is to say, on the 2db level) to maximum insertion.

The circuit 700 of Fig. 7 further provides the ring electric capacity 791 (C10) of 1 microfarad on the pin 4 and 5 of telephone jack.In using, some (for example Britain) need to use such filter to come some three-way telephone device of ring.Yet, should be realized that this electric capacity optionally depends on the specific application of filter circuit used in the present invention.

The circuit 700 of further noticing Fig. 7 embodiment advantageously with the separate inductive coil form various circuit inductance devices 706,708,724,726 (L1, L2, L3, L4) rather than, for example, normally used pair of EP13 type inductor in many prior aries designs.This device provides vertical modularization impedance and differential impedance, and this is all to require like this in some application (comprising for example European Telecommunication Standard).Traditional design based on EP does not have effective longitudinal impedance, therefore needs extra coil.Interpole coil has increased extra dc resistance, and in order to compensate the impedance of increase, often requires bigger coil, thereby improved and filter cost related and space requirement.Opposite, with separate winding design of the present invention, the size that there is no need to increase longitudinal coil or improve filter inductance.In the illustrated embodiment, by using controlled saturation inductor and/or dual-spool, and aforementioned longitudinal impedance can be provided and provide magnetic field to drive reed switch (as applicatory) such as the double shield inductor of assignee's manufacturing.

Dynamic filter circuit 700 disclosed herein means " dynamically " filter construction that state is provided by the operating condition that provides (i) can rely on relevant expanding unit on telecommunication line; (ii) provide the impedance of the return loss performance or the like of enhancing to correct circuit and solve inadequate stopband and voice band performance.Especially, in telecommunication line situation with voice and DSL signal component, when one of on the line phone off-hook (one of phone off-hook when mostly just being time in office), the dynamic circuit of off-hook filter has just improved its electric capacity, and all other on-hook phones on same circuit keep a low electric capacity with respect to circuit for answering.Because corresponding for existing of the polarity protection diode bridge of the main needs of the DSL stopband that strengthens and off-hook phone and phone, therefore, this dynamic capacity feature be acceptable and with the existing application compatibility.DSL high level this diode bridge in off-hook phone of overdriving of stream energy that makes progress, thus unwanted inter-modulation distortion produced.Therefore, need the DSL stopband of enhancing to stop such overdrive condition.When phone or other expanding unit on-hook, diode bridge removes from circuit, and needs less filter D SL stopband attenuation.Therefore in the filter circuit relevant, can use very little electric capacity with the on-hook phone.This has just permitted off-hook phone and has had a bigger electric capacity, and therefore dynamic filter can have approaching splitter performance.

Yet, should be realized that the most of electric capacity that removes during hook state also can reduce stop band loss, this can go wrong concerning the mode of operation of some on-hook stop band loss that need increase (for example calling out ID).Merging in the circuit 700 of controlled saturation inductance device 400,500 of the present invention has advantageously solved this problem, yet, only by improving input inductance value at the hook state median filter; That is to say, by " stepping " inductance with respect to the dc current characteristics is provided.Therefore, the combination of dynamic switch filter circuit and controlled saturation input side inductor provides in widespread adoption with very low cost and (has comprised and have many expanded application of calling out ID or similar functions) near perfect performance.

With reference now to Fig. 8 and 9,, other embodiment with the filter circuit that improves inductance device has been described.The circuit of Fig. 8 comprises to have and is connected to two line or the input sides of the input 866,868 of input inductor 840,842 separately.The exemplary circuit 800 of Fig. 8 has been utilized such as Fig. 6 dual-spool inductor device here so that this two inductance 840,842 to be provided, although different structure (for example two single spool drum core apparatus 500) can be replaced.The higher inductance that is provided by dual-spool inductor device 600 has advantageously produced enough inductance to permit filter 800 by the on-hook stop band loss for the filter more than 10, and allow bigger off-hook electric capacity to improve stopband (for example in order to call out the function of ID or the higher like this stopband of other requirement) simultaneously, also still satisfy the requirement of return loss.The use of having replaced the dual-spool device 600 of inductor 840,842 provides the important cost interests equally, and this is that the manufacturing cost of dual-spool device is normally extremely low because compare with making two single spool parts.In addition, the manufacturing of the circuit of Fig. 8 is also extremely simple, only needs two inductors 840,842 (that is to say a dual-spool inductor device), thus considered have fabulous stopband and performance of filter high cost-effectively circuit.

The circuit 900 of Fig. 9, similar to above-mentioned Fig. 8, comprise to have and be connected to two circuit or the input sides of the input 966,968 of input inductor 940,942 separately, also comprise distribution and optional three grades of filter circuits 960,972 communications of lateral surface socket.Be to expect three grades of such filter parts in some environment.

Manufacture method

With reference now to Figure 10 a and 10b,, the method that is used to make previous described inductance device here can go through and with the form diagram of logical flow chart.

Though will be appreciated that according to previous described embodiment and (that is to say, kettle core and drum core apparatus) draw following description here, it is various in this disclosed other structure and embodiment that but method of the present invention can be applied to by suitable modification usually, and this change is to be within the ken of those of ordinary skill in electronic installation manufacturing territory.

At first, the method 1000 of shop drawings 4 improved kettle core apparatus has been described with reference to figure 10a.In the first step 1002 of method 1000, obtain or make the second parts 402b of kettle core.The for example material preparation of the core many methods of suitably being familiar with of 402 preferential uses of the exemplary means of Fig. 4, compacting and sintering are formed by the saturating material of magnetic.Core 402 is manufactured, and these performances comprise the magnetic flux performance to have specific performance properties, section type and area, highly, and column diameter, owing to be known in the art thereby do not have further corresponding description here.

The first core components 402a can directly constitute (step 1004) by previous described shape-variable gap structure here, for example is used for assembling mould or the moulding that comprises the first core components 402a that expects gap characteristic by manufacturing.Interchangeable, can constitute the mirror image (step 1007) of the first core components 402a effectively through step 1006, and handle (step 1008) to produce the different shape slit of expectation as the second parts 402b.The part that the such processing of process step 1008 is included in the newel 406 of the machining at least the first core components 402a (for example has gap width W to desired results ₁90%/10% structure with W2) among the embodiment.Such machining comprises the required part of for example polishing stem stem 406 accurately.Replacedly, so as an example processing can comprise little cutting or grind, or or even by laser energy cutting or ablation.

Next, through step 1010, core components 402a, 402b can coat one layer of polymeric insulating material (for example parylene) or other material alternatively on some or all of surfaces, so that the protection winding is avoided damaging or insulation.When the winding that uses standard very or when having the winding of the thin-film covering layer that is being easy to wear and tear during very thin the winding, this cover layer is particularly useful.

Next, through step 1012, described core is twined by the wire shape with expectation.Such wire shape for example can comprise in annular " doughnut " mode basically thin specification magnet-wire is wrapped on the newel 406 of core concentrically, although can use the lead (insulating or other) and the canoe of other type.

Next assemble two core components 402 and use, for example, mate in the adjustment of they expectations (step 1014) as gluing mixing.Winding is captured in the recess that is formed in the core 402, with their free end route by being formed on the interior aperture 409 of core components 402 (or other similar a penetrating) side.

Next pass through step 1016, provide or make terminal arrays 425 and/or terminal 429.Terminal arrays structure 427 is used ideally to inject from suitable polymers or shift the mould process and is formed, although can replace with other material and method.Terminal 429 can comprise the feature of expectation, for example is used for the rich recess that connects and contacts attenuator with substrate on their bottoms, and advanced by pressing mold or be embedded into subsequently in the framework 427.The electronic applications that is manufactured on of terminal arrays is known like this, so here do not further describe.

Next pass through step 1018, the wire harness iron core is inserted or is installed in the terminal arrays 425 of previous described model.For example, in the exemplary embodiment, use the magnetic bead or the line of fall of suitable adhesive, for example epoxy resin adheres to core 402 on the framework 427 of terminal arrays.

Next winding terminal is received on the terminal 429,, for example use the welding process (step 1020) of advancing to be formed on the recess in the terminal end by solderless wrapped connection.

The inductance device 400 of assembling detects through step 1022 then alternatively, thereby has finished manufacture process.

Next with reference to figure 10b, the method that is used for shop drawings 5 and 6 improvement drum core apparatus has been described, for simplicity, with particular reference to the single spool core of Fig. 5.In the first step 1052 of this method 1050, obtain or make the drum core.The core 502 of the exemplary means of Fig. 5 is preferably from having used many processes of being familiar with very much, and for example material preparation forms in the saturating material of magnetic of compacting and sintering.Generation has the core 502 that comprises magnetic flux characteristic, section type and area, height and column diameter special properties, owing to be known in this area, does not therefore further describe at this.

Next,, avoid damaging or wearing and tearing, on some or all of surfaces, can cover core 502 with one deck alloy insulating material (for example parylene) or other material alternatively in order to protect winding through step 1054.

Next, the wire shape with expectation twines core through step 1056.Such wire shape for example can comprise in spirality strand mode basically thin magnet-wire is wrapped in the spool areas of core concentrically, although can use the lead (insulating or other) and the canoe of other type.

Next provide or construct terminal 529 through step 1058.As previous indicated, terminal 429 can comprise the feature of expectation, and the recess that for example is used for solderless wrapped connection on their bottom contacts attenuator with substrate.The electronic applications that is configured in of this terminal is known, does not therefore here further describe.

Next through step 1060 terminal 529 is embedded or is welded on the wire harness iron core 502.For example, in the exemplary embodiment, with one or strain for example the suitable adhesive of epoxy resin terminal 529 is adhered in the groove 535 of core 502.During step 1060, in groove 535 and under the terminal 529, winding is terminated on the terminal 529, thereby formed with it and to be electrically connected by their free end of route.Can use other method for example solderless wrapped connection and welding (consistent) in addition or as an alternative with the terminal structure of selecting.

Next, through step 1062, construct one or more controlled saturation parts 508.In the exemplary embodiment of Fig. 5, parts 508 comprise the Ni-Fe band.This band is (step 1064) made by the Ni-Fe alloy sheet of the desired thickness that at first forms.Through step 1066, use suitable aggressivity adhesive (or replacedly a kind of) infiltration subsequently a side of described, and use cutting machine with described band that cuts into suitable dimension through step 1068 based on epoxy resin binder.

Next in step 1070 from above-mentioned step 1062, obtain one or more with 508 along it axle vertically be fixed on the core 502 in case bridge joint in two end fitting 502a, the space between the 502b.Such connection can be by automatics (for example being suitable for parts 508 accurately are placed into machine on the core 502), or manually finishes.

The inductance device 500 of assembling detects through step 1072 subsequently alternatively, thereby finishes manufacture process.

Alternatively, using Ni-Fe continuously among the embodiment of the bulging core apparatus of band or similar alloy, can revise aforementioned process so that can cut the band of suitable dimension and be applied on the core 502.Use thermal contraction axle sleeve or pipeline (if use) outer peripheral areas then, cover controlled saturation band 508, and expose then and be with 508 to be attached to bulging core flange with contraction axis cover handle tightly to enough heat at least to the end flange of core.

With reference now to Figure 11 and 11a,, another embodiment according to controlled inductance device of the present invention is disclosed.In the embodiment of Figure 11 and 11a, device 1100 comprises the saturating core components 1102 of " drum " type magnetic basically and at the bifilar winding 1104 of the known model in electronic unit field, winding places on (being wound into) latter core 1106 core components 1102 on every side.Be different from the position of (here, less than) body portion flange 1112 diameters from last core flange 1110 diameters, the core components of illustrated embodiment is asymmetric basically.In this embodiment, the diameter of upper flange 1110 approximately is 0.256 inch (6.52 millimeters), however lower flange 1112, and in antelabium 1124 inside, about 0.346 inch of diameter (8.79 millimeters) is although can select other value.Core components 1102 usefulness Ferrite Materials in the present embodiment are formed, and can use other material (MN-Zn or the like) although should be realized that.A plurality of apertures 1110 or hole also form in the substrate flange, place the inductor terminal 1119 within core components 1102 substrates thereby allow finally to bind (for example welding) at the described bifilar inductor of inner volume outside route of device 1100.Inductor terminal 1119 welding advances to be formed at (not shown) in the recess below the substrate flange 1112, for example uses adhesive (for example ferrite adhesive) or potting compound.Also can use other structure that is used for these terminals, as those of ordinary skill should be realized that and can realize.Route makes the easier manufacturing of device in the lead-in wire of inner volume outside, consistently with the present invention can use other structure (being included in the interior terminal of inner volume of device 1100) although should be realized that if expect.

One basically cylindrical cap (screen) parts 1120 be positioned in basically near most windings 1104 and the core components 1102, the customization cap 1120 size with the upper surface that is formed on substrate sections flange 1112 on antelabium or edge 1124 match.Therefore, in fact cap 1120 relies on the antelabium of flange 1112 when two parts of combination.The inward flange 1123 of the cap of cutting sth. askew in the illustrated embodiment coupling face 1127 is so that form a slit that narrows down gradually near the periphery of substrate flange 1112, cutting sth. askew of even now do not require in putting into practice the present invention.

Aspect overcoat, cap 1120 further provides great benefit, and for example, the external electronic of the most approaching device 1100 of protection avoids the EMI of generation in device 1100 during operation.The effect major part of this overcoat effect comes from by cap 1120 guiding or forces space within the inner volume of cap.In illustrated embodiment, cap about 0.067 inch (1.7 millimeters) is thick, although can use other value.

Cap 1120 finally is connected on the substrate flange 1112, for example uses adhesive or even welding.Yet, before cap 1120 is attached on the core components 1102, controlled inductance parts 1130 be placed between the substrate of cap 1120 and core components 1102 in case can be between two parts of at least two diverse locations of base flange 1112 peripheries " clamping " controlled inductance parts 1130; That is to say, within aforementioned gradually narrow slot.

In the illustrated embodiment, controlled inductance parts 1130 comprise nickel (Ni) the alloy band (for example, within the scope of 0.001-0.005 inch, although can use other value) with predetermined thickness.Although should be realized that the combination that can use different bandwidth and tape thickness so that the electric and inductance characteristic for device 1100 expectations to be provided, the width with 1130 also controls to a desired value (about 5.08 nanometers (0.200 inch)) here.As what will be appreciated that, width that raises before saturated and/or thickness have improved the current-carrying electric capacity with 1130.In addition, as its function of length, with 1130 width and/or the thickness that can have disunity or a variation, as shown in Figure 11 b.Such type can the band electric current/saturation characteristic in desired advantages is provided, this be because, for example, vortex flow that in material, produces or surface effect.It also can comprise a plurality of less band 1130a, and 1130b is for example shown in Figure 11 c.Can use that to be used to provide many different structure controlled inductances (be based on " band " or other) consistent with the present invention.At the single unified band shown in the embodiment of Figure 11, yet, this is found to go to provide converging of desired character by the assignee; That is to say, low cost, good electric property and the simplification made (be with on the whole and installed) are especially owing to the reason of band.

During manufacture, with 1130 tops that place core components (and distortion) as requested upper flange 1110 symmetrically, so that it hangs down into the substrate horizontal plane of flange 1112 at least along a side of core components core.Also can use a silicones or adhesive with position alternatively with respect to core components 1102 fixed bands 1130.Therefore, when placement cap member 1120 is on the top of core 1102, partly be captured between the inward flange and base flange 1112 of cap 1120 at their ends with 1130 hanging portions, thereby when cap 1120 is absorbed in its last application position, is easy to tension force is increased to and is with on 1130.When assembling, easily mate flange 1112 and cap 1120 for convenience, can place two groups of bools 1180 with 1130 end portion alternatively.

In another optional embodiment, inductance component 1130 can be pre-formed and glue together or be placed in addition within covering or the cap 1120, and it can correctly be placed when being distributed on the wire core parts 1102 with convenient cap 1120.

Should be realized that the inductance device 1100 of Figure 11 can have multiple different purposes, comprise inductance that rising for example is provided and be reduced in such as recess frequency in the tuned part of this previous described elliptic filter.Such performance allows improved device 1100 to observe stricter or overcritical regulation, prior-art devices can not meet this regulation (at least by identical performance level provided by the invention, simplicity and low-cost aspect), for example aforesaid ETSI TS 952-1-5 standard.

With reference now to Figure 12,, an exemplary embodiment making the method for Figure 11 device 1100 has been described.Just as shown in Figure 12, core components 1102 and the cap 1120 (step 1202) that at first provides is provided method 1200, the both by the saturating material of identical (or similar) magnetic for example ferrite form.The formation of these type components is known, therefore is not described further.As the part of construction process, just as discussed previously, in substrate flange 1112, form two or more apertures 1117 and be used for terminal 1,119 four recesses.

Next, in step 1204, conduction terminal 1119 is provided and places in the aforementioned recess.This can use epoxy resin or colloid frictionally to receive, bind, if or other expectation remove to improve mechanical rigid then be attached to core components.

Next, in step 1206, (bifilar) winding is wrapped near the degree of depth/length of core of core components 1102 with layer mode to expectation.As the part of this step, peel off any insulating material, thereby make things convenient for winding to terminate to their terminals 1119 separately subsequently in the free end outside of winding.

The freedom of winding (being peelled off) termination route by the aperture and down to terminal 1119, their electric terminating (step 1208) at this.Such terminating can comprise welding, and epoxy resin connects, solderless wrapped connection, brazing filler metal or similar, or arbitrary combination thus.

Next,, provide inductance component (band) 1130 and shaping on the upper flange 1110 of core components 1102 through step 1210, as shown in Figure 11, so that terminal fore-and-aft tilt along core.As discussed above, can use adhesive or silicones to fix position alternatively with 1130.

Next cap 1120 is assemblied on the top of device 1100, and to gliding with engagement substrate flange 1112, (step 1212) just as discussed previously like that.With the residue length of " stop " band on the slit that is formed between these parts in fact, this has just caught the end with 1130 between two parts 1120,1112.If expect to be used for auxiliary retention portion part position, also cap (for example using so-called " ferrite gummed ") can be glued together or is attached to core components 1102, although also can substitute with other technology, for example come design part so that frictional engagement is enough to parts 1120,1102 are kept together with severe tolerance sufficiently.

At last, through step 1214, with the effective end of repairing with 1130 that washes of the sidewall of cap.If desired, this device also can detect (step 1216) alternatively.

Gapped anchor ring

With reference now to Figure 13-14b,, discloses and improved gapped anchor ring device.Figure 13 has showed the top orthogonal view of first embodiment of gapped anchor ring.In this embodiment, device 1300 comprises the saturating core 1302 of the magnetic with torus shape usually.Slit 1304 extends through a section of core 1302 up to inside radius from outer radius, can use whole in some applications or the part gap although will be appreciated that for magnetic that expectation is provided and/or the performance of electricity.The slit makes the function of the inductance of anchor ring parts as load current.The one or more conductive winding 1313 of placed around that begin about 30 degree and finish from about 30 degree of second side in slit from first side in slit at core 1302 are although will estimate the angular relationship that can use other (no matter be that symmetry asymmetric for the slit).Around 300 rough degree circumference of core residue, be evenly distributed winding, although also can utilize skimble-scamble winding space (density) for the characteristic that is provided at the variation in the device.In the exemplary embodiment, winding is made up of so-called " magnet-wire " in the electronic applications known type; So both also used this line because of it has good electric and mechanical performance because of its low relatively cost.Extend out from core in order to allow to be terminated to external device (ED) winding leads 1306.

With reference now to Fig. 4,, showed the sectional view (gap area is amplified a little with the clearer displaying details of energy) of first embodiment of gapped anchor ring device 1300 here.What place in slit 1304 is the saturating parts 1308 of magnetic that extend into slit 1304 to small part.Magnetic characteristic and the electrical property of the degree of depth that can control assembly 1308 so that expectation to be provided; Used in the illustrated embodiment and on anchor ring core outward flange, made the about 0.08 inch degree of depth of extending fast in parts 1308 tops.

Parts 1308 are made of common selection permalloy sheet or the band bigger a little than core that (see Figure 14 a), in this illustrated embodiment big (maximum), rough is 0.06 inch wide thoroughly.Should be realized that other material (or be used in combination with the permalloy of describing, for example in the compound device of bimetallic or layering, do not illustrate) of appropriate electrical and the magnetic characteristic that to select to have model known in this field equally here.This material can comprise, for example, and nickel, copper nickel, inconel, or accurate saturating any other metal or the conductive material of magnetic.Showed the cross section of the saturating parts 1308 of " U type " magnetic although also should be realized that Fig. 4, parts 1308 also can be formed by having other cross sectional shape, for example " V-type " (seeing Figure 14 b) or or even clip most advanced and sophisticated V-type (Figure 14 c).This structure provides the magnetic that passes the core slit " bridge ".In one embodiment, use the epoxy resin 1312 of a side of the parts that are distributed in core components outer radius surface simultaneously and are connected to above-mentioned outer radius surface that parts 1308 are bonded on the core components.Also can use other method for parts 1308 are bonded on the core components 1302, and be not limited to the restriction of other adhesive, raised surface feature or CONTACT WITH FRICTION.

Insulation spacer 1310 is separated the inboard of the saturating parts 1308 of magnetic.In one embodiment, pad 1310 comprises Mylar ^TMParts, although will recognize that can be with imagining to using other insulating material (polymer or other), and be not limited to polyamide (Kapton ^TM), fluoropolymer (for example, Tefzel ^TM), pottery and or even dispersed-power magnetic tape or brown paper and their composition.Pad 1310 has been avoided the shortening of the saturating parts 1308 of magnetic, high inductance and the low inductance when high electric current of this ability that will greatly reduce in addition unstable gap anchor ring when maintaining low current.Except separating the inboard of the saturating parts 1308 of magnetic, pad 1310 has also been guaranteed the physics contact between the wall of the slit of parts 1308 and adjacency.In one embodiment, use friction,, pad 1310 is bonded on the parts 1308 although also can use other such as the adhesive binding method.

With reference now to Figure 15,, the manufacture method of Figure 13 and 14 gap anchor ring has been described.Just as shown in Figure 15, the method 1500 of summary comprises the seamless anchor ring (step 1502) that at first is provided at model described here.It should be noted and to twine core in advance, or replacedly, finish said method and twine afterwards.

Next, through step 1504, construct apertured anchor ring (being desired size perhaps alternatively) to the existing slot arrangement within anchor ring according to desired size.This can finish by using the known mechanical technique of any amount.Alternatively, should be understood that the slit that can use expectation during its manufacture process constitutes anchor ring, thereby removed separation that step is formed in machining subsequently or slit.

Selecting after suitable material (for example, permalloy) is used for thoroughly parts 1308 and insulating element 1310, in the slit that step 1504 forms, passing through the shape and size that step 1506 is configured to these objects to expect in order to meet (when the assembling).At least in each of the part of permalloy parts 1308 and slit (side) surperficial direct physical contact be necessary, thereby allow to form one from the slit one side by the conducting path of material arrival slit opposite side thoroughly.The thickness (for example, always 0.0005 inch of illustrated embodiment) and the thickness/shape of insulating element 1310 of correct alternative pack 1308 help to implement this requirement, although can realize such connection by other method equally.

Next, parts 1308 thoroughly and insulating element 1310 are embedded slit (step 1508) reach the degree of depth of expectation, and use epoxy resin 1312 to connect in position.Only be illustrated in the peripheral placed around epoxy resin 1312 in slit 1304 though should be understood that Figure 14, fasten different parts and can use epoxy resin or sealant to cover whole slit/thoroughly parts/insulating element or its arbitrary part in order to tighten in the relative position of each other.

With reference now to Figure 16 and 16a,, another embodiment of gap of the present invention anchor ring device has been described.In this embodiment, the permalloy band 1602 that uses the most approaching slit 1604 relative the to place core slit of crossing device 1600 with the insertion parts of Figure 13.In this illustrated embodiment, in order to produce the overall inductance of 8.4mH, select the core slit 1604 of about 6,000 minutes (0.006 inch), although can use other value (and gap structure) far and away, only demonstration below.

In its basic structure, device 1600 comprises and the direct permalloy band 1602 of coupling of core material on the opposite side in slit 1604, thereby by with 1602 conducting paths that maintain between the both sides.In a distortion (Figure 16), band only bonds or snaps into outer peripheral areas near the core in slit.Can cover the core and the band (using for example silicones or parylene sealant) of assembling if desired, and twine.Replacedly, can twine core in advance, and 1602 (and covering if desired) are with in increase subsequently.

(Figure 16 a) uses short cylinder or not winding and gapped core 1654 partly with permalloy band 4652 and heat shrink tunnel 1656 in another distortion of device 1650.Use the thermal contraction of polyolefin irradiation in the illustrated embodiment, can use other material and material structure although will recognize that.For example, can use responsive to the exposure of other type or the material that reacts (for example, UV or electromagnetism or particular radiation, chemistry/catalyst, or the like other form).

In the illustrated embodiment, the part that the cylinder of thin permalloy band is divided into just size is to cross the slit and to be wound at least a portion of the periphery on each side in slit.Utilize banded cylinder alternatively, thereby help cutting apart of minimum number with expectation thickness.In thermal contraction cylinder 1656, place this band, and core is embedded wherein so that the slit of core is direct and permalloy band 1652 meets.This assembling is heated to correct temperature (or other cause contraction) around core 1654 then.Shrink like that as heat-shrinkage material, it is compressed in the gap area against the edge 1652 band tightly, periphery of core, thereby has finished " bridge " that passes through the slit, and on the appropriate location of core lasting this band of fixing.This assembling is wound then.

(not shown) in another embodiment, permalloy (or other) is connected to core and strides across the slit so that electricity/magnetic connects thereon, for example by use micro-adhesive (or replacedly fix it in position some install for example marginal belt) on the top that is connected a little.Whole assembling is with rear-inclined, atomizing, or vacuum/vaporization covers in the polymer, for example deposit of parylene.This covering is in fact in position gone up and " has been solidified " band, and provides the device winding can twine top seat.Previous discuss and whole as a reference disclosed quoted here on September 13rd, 2000, the Application No. 09/661 that is entitled as " advanced electronic microminiature coil and manufacture method thereof ", 628, be U.S. Patent number 6 now, 642,847, the illustrative methods that this covering is applied to the anchor ring device is disclosed.

With reference now to Figure 17 a-17d,, other embodiment that the present invention improves inductance device is disclosed.First and last, for inductance characteristic and saturation control that expectation is provided, each has utilized the gapped core (for example, anchor ring) of combination with the external control component of core pairing these embodiment.Other desired character of these embodiment is relevant with the manufacturing simplification with cost; As what go through in the paragraph below, in order to produce inductance device, external control component can comprise low-cost preproduction parts, for example simply snaps into core, and with the packing ring of one or more windings windings.

As shown in Figure 17 a-17b, first embodiment of aforementioned means 1700 is included in the gap anchor ring core 1701 of this previous described model.Shown core 1701 has the slightly seemingly cross section (seeing Figure 17 b) of rectangle, can use the accurately arbitrary cross sectional shape consistent with the present invention although should be understood that.Use adhesive or other adhesive, for example epoxy resin, acrylate adhesive, silicone glue, or or even fusing (welding or brazing filler metal) process, controlled saturation parts 1703 are matched with core 1701.Alternatively, parts 1703 can mechanically be snapped on the core (for example by rivet, post, friction fit, clamping plate, or other fixer device), although the solution of these back often increases the complexity of cost and device fabrication.Optional as another, only can be positioned at parts 1703 on the desired locations and direction near core, and in order to fix the relative position of these parts, whole assembling (core 1701 and parts 1703) then is coated with outward or outer mold (for example with silicones or based on sealant or other material of parylene).Yet even other method also is fine, so the description of front is stated as just demonstration.

In the embodiment of Figure 17 a-17b, parts 1703 are included in standard metal " flat " packing ring of mechanical field ubiquity model.Packing ring 1703 has one to help the center bore 1704 (no matter being by craft or automated process) that winding 1702 twines.This packing ring occurs by the metal alloy manufacturing that depends on the different weight percentage that its machinery requires and with the difformity and the size of surplus usually, and has therefore represented an important attribute; That is to say, diameter, thickness, aperture size, material or the like with low cost wide arrange commercial applicability.Therefore, the producer of inductance device 1700 only can find the application ideal dimensions, the shape that are used to expect of packing ring with experiment, or the like, and then with low cost commercial acquisition they.Alternatively, packing ring can be by forming with core 1701 identical materials, for example by horizontal cut-out core to produce a series of stacked " packing ring ".Equally also can use the washer part 1703 in many other sources.

As understand, thickness (with other physical parameter of the less degree of packing ring 1703) has determined the saturation characteristic of core 1701, however the outstanding contribution of permeability its inductance performance.Especially, rely on the application's illustrated embodiment to have one from every meter? (H/m) about 1k is to the permeability of 10k Henrys variation.Parts 1703 permeability are high more, and the difference between no current (for example on-hook) and operating current (for example off-hook) value is just big more.For example, selecting the thickness 1705 of packing ring approximately is 20% of packing ring 1703 and anchor ring core 1701 gross thickness; This ratio can change to adjust saturation factor when the electric current by device 1700 raises.Packing ring is thick more, needs the electric current of saturation device just big more.Thickness 1705 variations of packing ring 1703 are used for specific purposes; Should center on most of any application from 5% to 40% of gross thickness (core adds packing ring).

It is further to be understood that the thickness of parts 1703, shape (comprising width), or or even material blends do not need unified, but the particular characteristic or the changing features that can obtain along with expectation.For example, in a distortion, can use the packing ring of multilayer to arrange (not shown), wherein in order to provide magnetic flux figure about the layering of core variable thickness and/or infiltrative two or more packing ring on a side of core 1701 in fact to be sandwiched in together.As another alternatively, parts radially and/or can make different types of packing ring 1703 thickness and/or permeability on the axial location, " embedding " part that constitutes packing ring 1701 by the different-thickness and/or the infiltrative remainder of parts 1703 for example, and this embedded part is configured in the place in nearest in-core slit.Therefore, if desired, can make feature and the performance of parts 1703 so that expectation to be provided.

At manufacture view, come the exemplary means 1700 of shop drawings 17a-17b by the gapped core that previous described model at first is provided.Select one or more parts 1703 (for example packing ring), use adhesive, overlap joint process or other described mechanical devices to be connected on one or two face of core (face Figure 17 d is discussed as follows) then.If desired, these two parts also can keep not connecting till outer mold.

Next, if desired, through the mold core and the washer part outside a plurality of standard procedures of dip-coating, spraying, vacuum/evaporation deposition or the like of comprising of any amount.This step produces (insulation) cover layer on parts, winding finally is wrapped on the parts top.

Figure 17 c is the sectional view of device 1710 another embodiment, has showed crooked (hemisphere) washer part 1713 and the use of complementary core 1711.In this embodiment, select the curvature of washer part 1713 to approach the curvature of core 1711 parts, at least on its inner surface.This embodiment is useful when use has the cross section of more circles (with less rectangle).In a distortion, the conventional mechanical processing of flat gaskets is provided for fear of having to, used known Belleville packing ring; That is to say that assembler is only selected prefabricated Belleville packing ring and used for example previous described adhesive 1716 to be connected to core.As the embodiment of Figure 17 a-17b, if desired, assembling can be by outer mold, and twines with the winding 1712 of expectation model and quantity at last.As previous embodiment was described, the thickness 1715 of packing ring 1713 also influenced the saturation and the inductance characteristic of device 1710; Yet because the curvature of packing ring, magneto-elasticity is slightly different.

Figure 17 d is the perspective view of another embodiment of inductance device 1720, two plane control parts 1723a wherein, and 1723b is dispensed on the opposite of anchor ring core 1721.As what be appreciated that, can use this structure (comprising for example core 1711 and the central portion 1713 of Figure 17 c) with arbitrary shape core.These two parts 1723 on physical characteristic (size, thickness, permeability, etc.) can all fours, perhaps in the magnetic flux figure of asymmetry introducing device, selectively similar on a plurality of characteristics.For example, compare, wish first early than saturated first parts 1723a and/or core 1721 during the electric current rising with another part; In this case, can use thin packing ring 1723a as the first parts 1723a, and use thicker relatively packing ring as the second parts 1723b.Consistent with the arrangement of Figure 17 d, can use many other such variations (comprising those previous described single packing ring embodiment) about Figure 17 a-17b.

Interchangeable as another, use spring washer, as shown in Figure 17 e in the known model of mechanical field.Spring washer is on-plane surface basically, but does not have the slit.Therefore, packing ring in height changes from the teeth outwards as the function of polar angle.Correspondingly, when placing near core, spring washer provides a series of interrupted contact point 1737 between packing ring 1733 and core 1731.Then in continuous basically mode, or on core and packing ring, twine the winding (not shown) in isolated mode (for example, consistent with aforesaid contact point 1737, wherein high density winding occurs in " cave " 1738 of packing ring 1733) alternatively.

It should also be understood that consistent with previous embodiment, the packing ring that can use plane clearance or split.This slit can place the position near the core slit, or alternatively, at another polar angle away from the slit.

In addition, wherein in height there is difference in the slit that can use on-plane surface to split in some applications, as known in mechanical field between the gasket materials of first side in packing ring slit and the gasket materials on the other side.Therefore, when such packing ring placed on the face of core, it uneven surface occurred, thereby was causing on the device as the gradient in the magnetic flux figure of the function of polar angle.Winding only optionally is wrapped on some zone, and even some zone below packing ring in twine (that is to say that the face of packing ring plane and core is adjacency not).

(Figure 17 f) in another embodiment, the structure of one or more packing rings of use or similar packing ring between the part of anchor ring core.In the exemplary embodiment of Figure 17 f, core 1750 comprises two core segments 1751,1752.In illustrated embodiment, core segment comprises half of whole core 1750, although can use other relation, for example at this, two parts are the whole segments that do not wait.Packing ring 1753 comprises high osmosis ferrite packing ring, and places basically between two parts 1751,1752.Yet on ferritic appropriate location, can use other material with suitable permeability and physical characteristic.

For the magnetic coupling degree of expectation is provided, can adjust the interior and/or external diameter and/or the core segment 1751,1752 of packing ring 1753.And, for example in stacked structure, by using the magnetic characteristic that many packing rings 1753 can modifier.In such structure, packing ring is similarly (that is to say identical model, size, permeability and material), or interchangeable can be different types of, for example at thickness, permeability, or change on the material.

And the material of blind is inserted in packing ring 1753 between independent two, or between washer face and the core segment, so that control the magnetic characteristic in these slits.Can use band and/or adhesive with the spatial relationship between the fixing different parts, can be the external seal agent in the known model of electronic applications.Yet because its mechanical strength is preferably used adhesive usually.

In addition, should be understood that, can produce the crack to the device of Figure 17 f alternatively,, on one of two core segments 1751,1752 or both, all form the slit as shown in Figure 17 f.Though can after core 1750 is cut off or before, form the slit, the easiest formation before one piece core forms two core components 1751,1752.Because core segment is actually each other freely, for each other, can rotates this part (and because of their slit), thereby if desired, can have the slit skew each other.Alternatively, for the magnetic/electrical property that obtains to thirst for, if desired, the slit can form in washer part 1753.By given current open, those of ordinary skill will recognize that many various combinations of slit and slot placement.

Though should be realized that by a kind of particular order step of method and described some aspect of the present invention, these descriptions only are the demonstrations of broad method of the present invention, and can make amendment according to the demand of application-specific.Some step can be implemented unnecessary or alternatively under some environment.In addition, some step or function can be added among the disclosed embodiment, perhaps can change the execution sequence of two or more steps.All such variations here all are considered as included within this disclosed and right of the present invention of requiring.

In being applied to different embodiment, though the novel features of the present invention that foregoing detailed description has shown, described and points out, should be appreciated that, without departing from the invention, those skilled in the art can or handle graphic display unit and make various omissions, replacement in form and details and change.The description of front is a best mode of the present invention of carrying out current expection.This description never means restricted, but should be as the demonstration of comprehension principle of the present invention.Scope of the present invention should be determined with reference to claim.

Claims (31)

1. inductance device comprises:

Have and form the saturating core of apertured magnetic therein;

At least one places the locational winding of the most approaching described core; With

At least one places the saturating parts of magnetic on the plane basically on the most approaching described gap position;

Wherein said at least one transmissibility parts and core cooperation provide the expectation inductance characteristic as current function.

2. according to the inductance device of claim 1, the saturating parts of wherein said at least one magnetic comprise metal alloy.

3. according to the inductance device of claim 1, wherein on the predetermined distance in described slit, placing described winding.

4. according to the inductance device of claim 1, wherein said slit comprises " V " type basically.

5. according to the inductance device of claim 1, wherein said inductance characteristic comprises the inductance value relevant with first state, and this inductance value is basically greater than the inductance value relevant with second state.

6. according to the inductance device of claim 5, wherein said device is suitable for use in the telecommunication circuit, and described first state comprises the on-hook electric current and above-mentioned second state comprises " off-hook " electric current.

7. according to the inductance device of claim 1, wherein place described at least one basically the parts on plane so that the vector vertical with described parts plane is arranged essentially parallel to the central shaft of described core.

8. according to the inductance device of claim 7, wherein said at least one basically the parts on plane comprise flat and the packing ring of annular basically.

9. according to the inductance device of claim 1, wherein said at least one basically the parts on plane comprise the packing ring of annular basically with crooked inner surface, described inner surface places on the position of at least one face of approaching described core.

10. according to the inductance device of claim 9, the wherein said packing ring of annular in fact comprises the Belleville packing ring.

11. according to the inductance device of claim 1, wherein said at least one basically the saturating parts of magnetic on plane comprise and place the most approaching described slit and at described core components two parts on the opposite separately.

12. according to the inductance device of claim 11, wherein said two basically each of parts on plane comprise flat and the packing ring of annular basically, described packing ring is differing from each other aspect at least one.

13. according to the inductance device of claim 12, wherein said at least one aspect comprises thickness.

14. according to the inductance device of claim 12, wherein said at least one aspect comprises permeability.

15. according to the inductance device of claim 1, the parts on wherein said plane basically comprise the multi-layered devices with at least the first and second layers, described ground floor has at least one characteristic that is different from the second layer.

16. a method of making controlled inductance device comprises:

Provide magnetic saturating toroidal cores with the slit that extends through its at least a portion;

On the position of the most approaching described slit and core, place the saturating parts of magnetic; With

Around described core and described parts, twine a plurality of conduction wire turns.

17. according to the method for claim 16, wherein said placement step comprises:

The face of (i) described core at least (ii) one of the pairing face of described parts go up and place adhesive; With

Described transmissibility parts are placed on the position of the most approaching described core so that described adhesive snaps into above-mentioned parts on the described core.

18., further be included in described winding action at least a portion of the described core of sealing within polymer before according to the method for claim 17.

19., further be included in described winding action at least a portion of the described parts of sealing within polymer before according to the method for claim 18.

20., further be included in and place the saturating parts of second magnetic, at least a portion that described second parts are also surrounded in the action of a plurality of wire turns of described winding on the position of the most close described slit and described core according to the method for claim 16.

21. an inductance device that is suitable for use in the telecommunication circuit, described device has the controlled inductance characteristic, comprises:

Have one and form the saturating toroidal cores of apertured magnetic within it;

Be applicable to that magnetic bridge is connected to less the saturating parts of at least one magnetic of a described slit part; With

At least one is wrapped in described core and described at least one winding on the parts thoroughly;

Wherein said inductance characteristic comprises the inductance value relevant with the on-hook electric current basically greater than the inductance value relevant with " off-hook " electric current.

22. according to the device of claim 21, wherein:

Described at least one parts form by the saturating material of magnetic and with first predetermined structure; With

Described slit is formed in second predetermined structure;

Described first and second predetermined structures and described material cooperation provide described inductance characteristic.

23. according to the device of claim 22, wherein said first predetermined structure comprises ring-like basically parts, and described second predetermined structure comprises specific gap width and shape.

24. a telecommunication installation has:

Be used for first port with the external call line interface;

Be used between described first port and first user's set, transmitting second port of first signal;

Be used between described first port and second user's set, transmitting the 3rd port of secondary signal; With

Filter circuit, described filter circuit is suitable for optionally blocking described first signal and is sent to described second port, described filter circuit comprises at least one the ring-like core apparatus with inductance characteristic, this inductance characteristic to small part is determined by the thickness that places the close saturating parts of the described locational magnetic of at least one ring-like core

Wherein above-mentioned inductance characteristic comprises the inductance value relevant with the on-hook electric current basically greater than the inductance value relevant with " off-hook " electric current.

25. an inductance device comprises:

Have and form the saturating core of apertured magnetic within it;

At least one winding of on the position of the most close described core, placing; With

The saturating parts of on the most close described gap position, placing of at least one magnetic;

Wherein said at least one transmissibility parts and core cooperation are to provide the expectation inductance characteristic as current function, described inductance characteristic comprises described at least one parts at its saturated ratio, and this ratio is relevant with the thickness of described at least one parts at least in part.

26. a low-cost inductance device comprises:

Have and form the saturating and ring-like basically core of apertured magnetic within it;

At least one places and uses the packing ring on the plane basically that at least one face of adhesive and described core overlaps on the position in the most close described slit, described at least one packing ring has the magnetic transmissibility and has the thickness of selection, and the thickness of described selection is the saturated ratio of decision during the electric current between on-hook and the off hook state changes at least in part; With

Wherein said at least one transmissibility parts and core cooperation are to provide the expectation inductance characteristic as above-mentioned current function.

27. an inductance device comprises:

Have and form apertured magnetic transmissibility core within it, described core has a cross section, and this cross section is circular at least in part at least the first side that is close to described core in its periphery;

On the position in the most close described first and described slit, place the saturating parts of at least one magnetic, described parts have the inner surface that contains at least one bending area, and described bending area is fit to and being coupled so that the sealing between them to be provided to the conglobate peripheral cooperation of small part of described core basically; With

Twine a plurality of winding wire turns of at least a portion of described core and described parts;

Wherein said at least one transmissibility parts and core cooperation are to provide the expectation inductance characteristic as current function.

28. an inductance device comprises:

The saturating core of magnetic that comprises first and second core segments that separate basically; With

Place saturating parts of at least one magnetic between described first and second core segments to small part;

Wherein said at least one transmissibility parts and core cooperation are to provide the expectation inductance characteristic as current function.

29. according to the device of claim 28, the shape of wherein said core is ring-like basically, and described first and second parts comprise the part by the face decision of main the crossing described core that is parallel to described core.

30. according to the device of claim 29, wherein said at least one parts comprise the annular component of locational at least one similar packing ring between described first and second parts that place described core basically.

31., comprise one of at least the slit that forms diametrically basically in wherein said core segment and the described similar washer part within it according to the device of claim 30.

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