[go: up one dir, main page]

EP2946174A1 - Arrangement de bobines comportant deux bobines - Google Patents

Arrangement de bobines comportant deux bobines

Info

Publication number
EP2946174A1
EP2946174A1 EP13814498.5A EP13814498A EP2946174A1 EP 2946174 A1 EP2946174 A1 EP 2946174A1 EP 13814498 A EP13814498 A EP 13814498A EP 2946174 A1 EP2946174 A1 EP 2946174A1
Authority
EP
European Patent Office
Prior art keywords
coil
coils
longitudinal direction
position sensor
winding
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP13814498.5A
Other languages
German (de)
English (en)
Inventor
Alexander Graf
Florian WEINL
Michael Pantke
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ZF Friedrichshafen AG
Original Assignee
ZF Friedrichshafen AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by ZF Friedrichshafen AG filed Critical ZF Friedrichshafen AG
Publication of EP2946174A1 publication Critical patent/EP2946174A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
    • G01D5/12—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means
    • G01D5/14—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage
    • G01D5/20—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage by varying inductance, e.g. by a movable armature
    • G01D5/204—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage by varying inductance, e.g. by a movable armature by influencing the mutual induction between two or more coils
    • G01D5/2046—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage by varying inductance, e.g. by a movable armature by influencing the mutual induction between two or more coils by a movable ferromagnetic element, e.g. a core
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
    • G01D5/12—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means
    • G01D5/14—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage
    • G01D5/20—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage by varying inductance, e.g. by a movable armature
    • G01D5/2006—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage by varying inductance, e.g. by a movable armature by influencing the self-induction of one or more coils
    • G01D5/2013—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage by varying inductance, e.g. by a movable armature by influencing the self-induction of one or more coils by a movable ferromagnetic element, e.g. a core
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
    • H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
    • H01F41/04—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets for manufacturing coils
    • H01F41/06—Coil winding
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F5/00—Coils
    • H01F5/04—Arrangements of electric connections to coils, e.g. leads
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49002—Electrical device making
    • Y10T29/4902—Electromagnet, transformer or inductor
    • Y10T29/49073—Electromagnet, transformer or inductor by assembling coil and core

Definitions

  • the invention relates to a coil arrangement having a first coil and a second coil, which are electrically connected to one another and are arranged substantially coaxially to each other, wherein the first coil has a winding density increasing in the longitudinal direction of the coil arrangement. Furthermore, the invention relates to a position sensor, as well as to a manufacturing method of the coil arrangement.
  • non-contact linear position sensors are known.
  • the main representatives use magnetic fields for sensing. These include sensors that use the Hall effect or the law of induction.
  • the latter in turn, can be divided into two groups according to their mode of action. Common to both is an arrangement of coil and donor element, which must be electrically conductive in the first group and in the second group must be a soft magnetic material.
  • the first group uses the induction to build up an opposing field in an electrically conductive material which attenuates the excitation field.
  • the encoder element is used to change the degree of damping proportionally to the path.
  • the energy needed to sustain the excitation field can be used as a measure.
  • the path-giving element does not enter the coil.
  • the second group differs from this in that the magnetic field in the coil is directly influenced by the soft-magnetic sensor element.
  • the inductance of the coil is measured, whereby there are different methods.
  • position sensing relies on the utilization of the relative permeability of soft magnetic iron and the associated fact that the inductance of a coil is proportional to the relative permeability of the spool core.
  • the coil core is used as an element giving away, which leads to a change in the inductance and thus to a path proportional to the measured variable. For this simple linear coils are used or simple coils in several chambers to influence the sensitivity.
  • LVDT Linear Variable Differential Transformer
  • PLCD Permanent Magnetic Linear Contactless Displacement
  • a primary coil and two secondary coils are used, these being arranged along the path to be sensed.
  • the long primary coil sits midway between the short secondary coils at both ends of the sensor. All three coils sit on a soft magnetic rod, which is arranged parallel to the measuring path.
  • a magnet which serves as a donor element, the field distribution of the primary to the secondary coils can be influenced.
  • a disadvantage of these known sensors is that they are constructed very expensive.
  • the position sensor described in the document DE 38 01 779 C2 or the coil assembly underlying the sensor is simple and essentially requires only two coaxial coil, with a movable magnetically conductive element inside the coil. In this case, one of the coils has a variable winding density in the longitudinal direction.
  • the object of the invention is therefore to provide a coil arrangement by means of which a high-precision position sensor can be realized.
  • the object is achieved by a coil arrangement with the features of claim 1 and by a position sensor having the features of claim 9 and by a manufacturing method having the features of claim 12. Particularly preferred embodiments thereof are the respective dependent claims.
  • the invention relates to a coil assembly, in particular for a position sensor.
  • the coil arrangement has a first coil and an ne second coil, which are electrically connected to each other and which are arranged substantially coaxially to each other, wherein the first coil has an increasing in the longitudinal direction of the coil assembly winding density.
  • the second coil has a winding density decreasing in the longitudinal direction of the coil arrangement.
  • the winding density of the first winding increases in the longitudinal direction of the coil assembly, while at the same time the winding density of the second winding decreases in this longitudinal direction.
  • the winding densities of the coils thus develop in opposite directions along the coil longitudinal direction.
  • the second coil no longer serves only as a reference coil for the first coil, but now also the inductance of the second coil is dependent on the position of a magnetically conductive donor element when the coil assembly is used in a position sensor with such a donor element.
  • the winding density is in particular the number of windings per unit length in the longitudinal direction of the coil arrangement.
  • a change in the winding density is caused by an increase or decrease in the radial number of winding layers.
  • the fill factor of the coils in the longitudinal direction of the coil assembly remains constant, whereby a constant good measurement resolution of the position sensor or the coil assembly is effected in the longitudinal direction.
  • the coils are each wound in particular orthocyclic, which also a particularly good filling factor can be achieved.
  • the coils particularly preferably have an opposite sense of winding. They thus build up a mutually influencing magnetic field when electrical current is applied.
  • the distribution of the electrical voltage within the coil arrangement during electrical energization of the same is dependent on the ohmic and inductive portion of the coils.
  • a coil-associated, magnetically conductive donor element thereby significantly influences the inductance of the individual coils, wherein this influence is dependent on the position of the gerber element due to the changing winding density along the coil longitudinal direction.
  • the winding density of the first coil in the longitudinal direction of the coil arrangement increases substantially as the winding density of the second coil decreases.
  • the winding density of the first and second coil changes linearly.
  • the linear change may in this case only be present within a longitudinal section of the coil arrangement in the longitudinal direction or extend over the entire length of the coil arrangement in the longitudinal direction.
  • the inductance depends essentially linearly on the position of a magnetically conductive transmitter element with respect to the coil arrangement, whereby the inductance of the coil arrangement can then be used to close the position of the transmitter element with respect to the coil arrangement in a particularly simple manner.
  • the winding density of the first and second coil changes in sections by leaps and bounds.
  • the coil arrangement has at least two longitudinal sections in the coil longitudinal direction, which have different winding densities at the directly adjoining sides.
  • the inductance of the coil arrangement changes abruptly when a magnetically conductive donor element is moved relative to the coil arrangement from one of the longitudinal sections into the other of the longitudinal sections. This sudden change in the inductance is very clearly detected, whereby the position of the donor element when passing the density change, ie the transition between the longitudinal sections, very clearly and accurately determined is.
  • one or more reference points along the coil longitudinal direction can be marked by one or more transitions between two directly consecutive longitudinal sections, having different winding densities.
  • several or a plurality of longitudinal sections may be provided with mutually different winding densities, which cause an incremental change in the winding density in the coil longitudinal direction.
  • the position of the magnetically conductive donor element with respect to the coil arrangement is clearly recognizable incrementally. The more such lengths are present, the more accurate the position of the donor element in the longitudinal direction can then be determined incrementally.
  • the winding density of the first and second coil changes in a first longitudinal section of the coil arrangement, wherein this change is in particular linear.
  • the winding density of the first and second coils is constant.
  • the winding density of the first and second coils changes, and this change is also particularly linear. This results in a high measuring sensitivity and easy evaluability of the coil arrangement in the first and third longitudinal section, while a relatively low measuring sensitivity is effected in the second longitudinal section. In particular, this is a section of length within which no accurate measurement is required.
  • Such a design of the coil arrangement can also be used to linearize the sensor characteristic curve when using the coil arrangement in a position sensor.
  • the two coils are electrically connected in series directly one behind the other, with a Meßabgriff between the coils.
  • the structure of the coil assembly is particularly simple.
  • the coils in this case form a voltage divider.
  • the two coils are each electrically connected in series with a comparison resistor, wherein each of the coils forms a branch of a Wheatstone measuring bridge circuit together with the comparison resistor connected in series.
  • a measuring tap is provided between each of the coils and the comparison resistor connected in series with the coil.
  • the two coils are thus electrically connected in parallel with each other, wherein each of the coils is electrically connected in series with the respective comparison resistor.
  • a magnetically conductive housing is provided, for example made of a ferromagnetic material, within which the coils are arranged, for magnetically influencing the magnetic flux within the coil arrangement.
  • the position sensor according to the invention has a coil arrangement according to the invention as described above, as well as a magnetically conductive transmitter element, which is arranged to be movable along the longitudinal direction of the coil arrangement as a position sensor.
  • the transmitter element can thus be arranged either movably in an interior of the coil arrangement along the coil longitudinal direction, in particular coaxially to the coil arrangement, or alternatively movably arranged around an exterior of the coil arrangement along the coil longitudinal direction, in particular coaxially with the coil arrangement, thus enclosing the coil arrangement in an annular manner.
  • the position sensor can also be used as an actuator and thus can be referred to as such alternative.
  • This force can be tapped on the encoder element and can be manipulated of devices, such as switching elements of a vehicle transmission or valves, are used.
  • the generated force can be increased and influenced by providing a magnet yoke.
  • the shape of the magnetic yoke can be such that the position sensor forms a so-called proportional magnet.
  • the coil arrangement is designed in the longitudinal direction at least circular segment-shaped, wherein the encoder element is at least circular segment-shaped movable as angular position encoder along the longitudinal direction of the coil assembly, so that the position sensor forms an angular position sensor.
  • the coil assembly is straight in the longitudinal direction, wherein the encoder element is linearly movable as a linear position encoder along the longitudinal direction of the coil assembly, so that the position sensor forms a linear position sensor.
  • the coil arrangement is particularly preferably first energized with one or more voltage jumps. Subsequently, the step response of the coil arrangement (current and / or voltage curve) is evaluated and finally determines the position of the encoder element.
  • the step response of the coil arrangement is dependent on the position of the encoder element, since this affects the inductance of both coils. Since, in the embodiment of the coil arrangement according to the invention, both coils have a winding density which varies in opposite directions, the step response changes particularly strongly as a function of the position of the transmitter element, as a result of which the position of the transmitter element with respect to the coil arrangement can be evaluated particularly accurately.
  • the method disclosed in DE DE 1 0200501 8012 A1 and DE 102008043340 A1 and DE 1 0201 1 083007 A1 have proved the Applicant.
  • the manufacturing method according to the invention for the above-mentioned coil arrangement according to the invention is characterized by a first manufacturing step, in which the first radially inner coil is wound, and by a second manufacturing step, in which the second, radially outer coil is wound, and by a third manufacturing step, wherein the first coil is electrically connected to the second coil.
  • the manufacturing steps are preferably carried out in this time staggering. This production method results in a particularly simple and cost-effective production of the coil arrangement.
  • the winding of the second coil preferably takes place in such a way that the mutually opposite ends of the winding layers of the first and second coils lie directly against one another.
  • voids in the coil assembly are avoided and the fill factor of the entire coil assembly is optimized.
  • Fig. 1 a first preferred embodiment of the coil assembly
  • Fig. 2 a second preferred embodiment of the coil assembly
  • Fig. 3 a third preferred embodiment of the coil assembly
  • Fig. 4 a preferred embodiment of the coil assembly with a
  • FIG. 5 shows a first preferred electrical connection of the coil arrangement
  • Fig. 6 a second preferred electrical interconnection of the coil assembly
  • Fig. 7a-c preferred driving method of the coil assembly
  • Fig. 8a-c preferred manufacturing steps for producing a coil assembly.
  • each show a coil arrangement with a first coil 1 and a second coil 2 in a longitudinal section along the coil longitudinal direction X.
  • a lower half of the coils 1, 2 is not shown for the sake of clarity.
  • the coil longitudinal direction X preferably simultaneously forms an axis of symmetry of the coil arrangement.
  • the coils 1, 2 thus form a common hollow cylinder around the coil longitudinal direction X.
  • the first coil 1 forms a radially inner coil
  • the second coil 2 forms a radially externa ßere coil.
  • the coils 1, 2 are thus arranged substantially coaxially to the coil longitudinal direction X into each other.
  • the individual windings of the coil 2 are shown by way of example. They are orthogonal to the plane of the figures. As shown, the windings of the coils 1, 2 are preferably arranged orthocyclically with respect to one another in order to maximize the fill factor of the coils 1, 2. It can also be seen that the coils 1, 2 consist of several radial layers of windings. The steps for preferred manufacture of the coil assembly are shown in Figures 8a-c and the associated description.
  • a coil 1, 2 associated magnetic conducting element is indicated by the reference numeral 3.
  • the encoder element 3 is designed to be movable along the coil longitudinal direction X. Since it is designed to be magnetically conductive, it influences the inductance of the two coils 1, 2.
  • the tanning element 3 is made, for example, of soft or other ferromagnetic material. Together with the coil arrangement thus results in a position sensor, by means of which a position of the encoder element 3 with respect to the coil assembly, in particular a position along the coil longitudinal direction X, can be determined.
  • the transmitter element 3 is arranged in an inner space of the coils 1, 2 substantially coaxially with these. Alternatively, it may be arranged annularly around an outer surface of the coils 1, 2 substantially coaxially therewith.
  • the first coil 1 has an increasing coil in the longitudinal direction X winding density (seen from left to right).
  • the second coil 2 has a winding density decreasing in the coil longitudinal direction X in this coil longitudinal direction X (seen from left to right).
  • the number of windings per unit length in the coil longitudinal direction X is to be understood as the winding density. hen.
  • the winding densities of the coils 1, 2 change in opposite directions along the coil longitudinal axis X.
  • a winding density (windings per coil volume) related to the coil volume can therefore remain constant in the coil longitudinal direction X, which can be seen from the windings of the second coil 2 shown by way of example.
  • the overall winding density of the coil arrangement - ie both coils 1, 2 together - (windings per unit length in the coil longitudinal direction X) remain constant by the coils 1, 2 are wound so that the winding density of the first coil 1 in the coil longitudinal direction X increases as the winding density of the second coil 2 decreases.
  • the winding density of the first and second coils 1, 2 changes linearly in the coil longitudinal direction X.
  • the inductance of the first and second coils 1, 2 changes substantially in proportion to the position of the transmitter element 3 along the Coil longitudinal direction X. This allows a simple evaluation of the position.
  • the first coil 1 in this case has a substantially conical outer surface, while the second coil 2 has a substantially conical inner surface, which bears directly against the conical outer surface of the second coil 2.
  • the winding density of the first and second coils 1, 2 changes abruptly.
  • the coils 1, 2 each have different longitudinal sections 4 (in FIG. 2 in each case a total of 4 longitudinal sections), within which the winding density in the coil longitudinal direction X remains constant.
  • Each longitudinal section 4 has a different winding density compared to the directly adjacent longitudinal section 4. If the transmitter element 3 passes through a transition Ü from one longitudinal section to a directly adjoining another longitudinal section 4, the inductance of the coils 1, 2 suddenly changes, which is easily and clearly ascertainable. Thus, it can be very robust to determine at which transition Ü of the longitudinal sections 4, the donor element 3 is currently.
  • a sudden change in the winding density in the coil longitudinal direction X can also serve to represent reference points.
  • a sudden change in the winding density in the axial center of the coils 1, 2 may be provided to mark a center position of the donor element 3 and to make the achievement of this center position easily detectable. This means that defined end positions or other defined reference positions can be created as desired.
  • the coils 1, 2 each have three longitudinal sections 4a, 4b, 4c, wherein the winding density in the first and third longitudinal section 4a, 4c changes linearly, while it remains constant in the second longitudinal section 4b.
  • the winding density is the same in each case.
  • the winding density at the transition Ü does not change abruptly in the case shown.
  • the winding density at one or more of the transitions Ü changes abruptly.
  • the inductance in the second longitudinal section 4b is constant, the inductance barely changes when the transmitter element 3 is moved within the second longitudinal section 4b; the detection of the position of the transmitter element 3 in this longitudinal section 4b is correspondingly more difficult.
  • a linearization of the sensor characteristic is possible. This means that the inductance of the coil arrangement of the position sensor is linearly dependent on the position of the transmitter element 3 with respect to the coil arrangement along the coil longitudinal direction X.
  • the coil arrangement according to FIG. 4 has a coil housing 5 which is magnetically conductive. As a result, the magnetic flux in the interior of the coil arrangement in the region of the encoder element 3 is significantly improved.
  • the coils 1, 2 in Fig. 4 correspond to those from Fig. 1.
  • the housing 5 can of course be used in any type of coil arrangement according to the invention, as for example in the embodiments of FIG. 2 or 3.
  • the housing 5 can also be designed specifically as a magnetic yoke.
  • a force generated by the magnetic field of the coils 1, 2 force can be amplified or caused on the donor element 3, when the coil assembly is electrically energized accordingly.
  • the position sensor formed from the coil assembly and the encoder element 3 can then serve as an actuator by the magnetic force acting on the donor element 3 is used for actuating a device, such as a valve or affygetriebeschalt- element.
  • the two coils 1, 2 are connected electrically in series directly one behind the other, wherein a measuring tap 6, that is to say an electrical measuring connection, is provided between the coils.
  • the series-connected coils 1, 2 are in this case connected between two electrical potentials, in detail a voltage source Ub and a ground or ground Gnd.
  • One of the coils 1, 2 is thus located between the measuring tap 6 and the voltage source Ub and the other of the coils 1, 2 is located between the measuring tap 6 and the ground or ground Gnd.
  • An electric current flowing through the coils 1, 2 is indicated by i.
  • the coil arrangement forms a voltage divider through the series connection.
  • the total voltage between Ub and Gnd divides on the coils 1, 2, depending on the electrical resistance of the coils.
  • the coils 1, 2 are energized with a voltage jump or with an alternating voltage, it is in turn dependent on the inductance of the respective coil 1, 2, which on the other hand depends on the position of the encoder element 3 with respect to the coil arrangement.
  • the position of the transmitter element 3 can be determined on the basis of the voltage potential at the measuring tap 6.
  • the coils 1, 2 are each connected electrically in series with a comparison resistor 7.
  • One or both of the comparison resistors 7 can have a variable electrical resistance (ohmic resistance) have, for example, these are potentiometers.
  • the series circuits of comparison resistor 7 and coil 1, 2 are connected in parallel to each other between two electrical potentials, in detail a voltage source Ub and a ground or ground Gnd.
  • each series circuit of comparison resistor 7 and coil 1, 2 form a separate branch of a so-called Wheatstone measuring bridge circuit, wherein in each case a Meßabgriff 6 between each of the coils 1, 2 and the series resistance comparison 7 is provided.
  • the total electric current i flowing through the coil arrangement divides onto the two branches.
  • a voltage divider is formed by the respective coil 1, 2 and the comparison resistor 7.
  • a specific voltage potential is formed at each measuring tap 6 as a function of the inductance of the coil 1, 2.
  • the resulting voltage potential between the two Meßabgriffen 6 is denoted by dU. Based on dU then the position of the donor element 3 can be determined with respect to the coil assembly.
  • FIGS. 7a to 7c each show possibilities for electrical energization (activation) of the coil arrangement, for example the electrically interconnected coil arrangement according to FIG. 5 or 6.
  • the ordinate axis plots the electrical voltage U, the time ti is plotted on the abscissa axis.
  • the duty cycle of the voltage oscillations ie the ratio between pulse duration t and period T can be suitably selected.
  • the duty cycle is about 50%, which is only an example.
  • FIGS. 8a to 8c show preferred production steps for producing a coil arrangement according to the invention.
  • a first production step (FIG. 8a) the first coil 1 is wound, which forms the radially inner coil of the coil arrangement.
  • first an innermost layer of the windings is helically wound along the coil longitudinal direction X, for example on a cylindrical carrier element (not shown) which remains in the coil arrangement or is removed after its production.
  • the first six rows of the first winding layer are shown by way of example in cross section in FIG. 8a.
  • the second layer of the windings in the opposite direction to the first layer is helically wound along the coil longitudinal direction X, radially spaced from the first layer.
  • each layer is wound in the opposite direction to the directly preceding winding layer helically along the coil longitudinal axis X.
  • the windings are arranged orthocyclically.
  • the winding layers are designed to have different lengths in the coil longitudinal direction X.
  • the length l of the winding layers of the first coil 1 decreases continuously, ie each winding layer is shorter by a predetermined amount than the directly preceding winding layer.
  • the winding density of the first coil 1 increases substantially linearly.
  • the length I of each individual winding layer with respect to the immediately preceding layer is shortened continuously until the desired number of windings or the desired outer diameter is reached.
  • the second coil 2 is wound, which forms the radially outer coil of the coil arrangement.
  • an innermost layer of the windings is also initially helically wound along the coil longitudinal direction X.
  • the second layer is helically wound in the opposite direction along the coil longitudinal direction X, radially spaced from the first layer.
  • the production of the other winding layers is done analogously, ie each layer is wound in the opposite direction to the directly preceding winding layer helically along the coil longitudinal axis X. In order to achieve the largest possible fill factor, the windings are arranged orthocyclically.
  • the winding length l of the second coil increases, and preferably to the extent to which the winding length of the first coil 1 decreases.
  • the winding of the layers of the second coil 2 preferably takes place in such a way that the mutually assigned turned ends of the winding layers of the first and second coil 1, 2 abut directly against each other. This avoids gaps in the coil assembly and optimizes the fill factor.
  • the wires of the coils 1, 2 are basically made as thick as possible.
  • a third production step (FIG. 8c) the two finished wound coils 1, 2 are electrically connected to one another.
  • This can, as shown in Fig. 8c, by electrical contacting two adjacent free ends of the wires of the coils 1, 2 take place directly on the coil assembly (by means of the connecting conductor 8) or alternatively such that the free ends of the wires 1, 2 electrically into a directly adjacent or remotely spaced electronics, where they are electrically connected according to the desired interconnection (see Fig. 5 and 6), optionally together with other electrical and / or electronic components.
  • the electrical connection of the coils 1, 2 shown in FIG. 8c results in the series connection of the coils 1, 2 illustrated in FIG. 5 by means of the connecting conductor 8.
  • the connecting conductor 8 is accordingly designed to be electrically contactable to form the measuring tap 6 (indicated by the right-hand arrow), while the remaining ends of the coil wires are each made electrically contactable with an electrical potential (indicated by the two left-hand arrows).

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Manufacturing & Machinery (AREA)
  • Transmission And Conversion Of Sensor Element Output (AREA)
  • Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)

Abstract

L'invention concerne un arrangement de bobines, en particulier pour un capteur de position, comportant une première bobine (1) et une deuxième bobine (2) qui sont électriquement reliées ensemble et sont disposées sensiblement coaxialement l'une par rapport à l'autre, la première bobine (1) présentant une densité de spires croissante dans la direction longitudinale (X) de l'arrangement de bobines, alors que la deuxième bobine (2) présente une densité de spires décroissante dans ladite direction longitudinale (X) de l'arrangement de bobines. L'invention concerne en outre un capteur de position comportant un tel arrangement de bobines et un procédé de fabrication pour un tel arrangement de bobines.
EP13814498.5A 2013-01-18 2013-12-17 Arrangement de bobines comportant deux bobines Withdrawn EP2946174A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102013200698.5A DE102013200698A1 (de) 2013-01-18 2013-01-18 Spulenanordnung mit zwei Spulen
PCT/EP2013/076833 WO2014111218A1 (fr) 2013-01-18 2013-12-17 Arrangement de bobines comportant deux bobines

Publications (1)

Publication Number Publication Date
EP2946174A1 true EP2946174A1 (fr) 2015-11-25

Family

ID=49885229

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13814498.5A Withdrawn EP2946174A1 (fr) 2013-01-18 2013-12-17 Arrangement de bobines comportant deux bobines

Country Status (5)

Country Link
US (1) US20150354991A1 (fr)
EP (1) EP2946174A1 (fr)
CN (1) CN104903684A (fr)
DE (1) DE102013200698A1 (fr)
WO (1) WO2014111218A1 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102015222400A1 (de) * 2015-11-13 2017-06-08 Schaeffler Technologies AG & Co. KG Multilayer-Platine und Verfahren zu deren Herstellung
CN105719829B (zh) * 2016-04-25 2017-09-19 安徽感航电子科技有限公司 一种三线制lvdt的绕线工艺
GB201608207D0 (en) * 2016-05-10 2016-06-22 Gill Corporate Ltd A pulse-induction displacement transducer
CN106091919B (zh) * 2016-06-08 2019-08-13 爱德森（厦门）电子有限公司 一种金属导线材偏心度快速检测装置及方法
US10955263B2 (en) 2019-04-18 2021-03-23 Honeywell International Inc. Apparatuses, systems, and methods for improved sensor devices
EP3812708B1 (fr) * 2019-10-21 2022-08-31 Hamilton Sundstrand Corporation Transducteur différentiel linéaire variable
CN118969466B (zh) * 2024-10-16 2025-01-24 四川永星电子有限公司 一种lvdt线圈结构

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0855018A2 (fr) * 1995-09-19 1998-07-29 Czarnek And Orkin Laboratories, Inc. Capteur inductif pour surveiller le niveau et du deplacement d'un fluide et de deplacements

Family Cites Families (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3113280A (en) * 1960-02-01 1963-12-03 Hobley Peter Electro-magnetic means for measuring a mechanical excursion
SE406642B (sv) * 1977-02-16 1979-02-19 Aga Ab Elektromekanisk legesgivare
DE3518772A1 (de) * 1985-05-24 1986-11-27 Robert Bosch Gmbh, 7000 Stuttgart Sensoranordnung
IE59150B1 (en) * 1986-05-16 1994-01-12 Kollmorgen Ireland Limited Transducers for hostile environments
ATE153443T1 (de) * 1988-01-22 1997-06-15 Data Instr Inc Weggeber mit gegenüberliegenden spulen für verbesserte linearität und temperaturkompensation
DE3801779C2 (de) 1988-01-22 1997-10-23 Vdo Schindling Wegsensor
JP2000337808A (ja) * 1999-05-26 2000-12-08 Matsushita Electric Works Ltd センサ
US6605939B1 (en) * 1999-09-08 2003-08-12 Siemens Vdo Automotive Corporation Inductive magnetic saturation displacement sensor
DE10044839B4 (de) * 1999-09-27 2004-04-15 Siemens Ag Induktiver Positionssensor
DE10255710A1 (de) * 2002-11-29 2004-06-09 Hella Kg Hueck & Co. Induktiver Wegesensor
DE10322447A1 (de) * 2003-05-19 2004-12-09 Bayerische Motoren Werke Ag Positionsmessvorrichtung und Verfahren zur Positionsermittlung
DE10342473B4 (de) * 2003-09-15 2011-04-28 Sick Ag Magnetischer Wegsensor
JP4451111B2 (ja) * 2003-10-20 2010-04-14 株式会社荏原製作所 渦電流センサ
ATE398765T1 (de) * 2004-03-01 2008-07-15 Sagentia Ltd Positionssensor
DE202004013916U1 (de) * 2004-09-07 2006-01-12 Haimer Gmbh Gerät zum Spannen eines Rotationswerkzeugs in einem Werkzeughalter
DE102005018012A1 (de) 2005-04-18 2006-10-19 Zf Friedrichshafen Ag Sensorlose Positionserkennung in einem elektromagnetischen Aktuator
DE102006061771B4 (de) * 2006-12-28 2014-12-31 Sick Ag Magnetischer Wegsensor mit linearer Kennlinie des Ausgangssignals
DE102008043340A1 (de) 2008-10-31 2010-05-06 Zf Friedrichshafen Ag Verfahren zur Positionserfassung des Magnetankers eines elektromagnetischen Aktuators
CN101876526B (zh) * 2009-04-30 2012-06-27 西门子（中国）有限公司 一种位移传感测量的方法和位移传感装置
DE102011083007B4 (de) 2011-09-20 2022-12-01 Zf Friedrichshafen Ag Verfahren und Ansteuervorrichtung zum Ansteuern eines elektromagnetischen Aktuators
GB201117201D0 (en) * 2011-10-04 2011-11-16 Howard Mark A Detector

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0855018A2 (fr) * 1995-09-19 1998-07-29 Czarnek And Orkin Laboratories, Inc. Capteur inductif pour surveiller le niveau et du deplacement d'un fluide et de deplacements

Also Published As

Publication number Publication date
DE102013200698A1 (de) 2014-07-24
WO2014111218A1 (fr) 2014-07-24
CN104903684A (zh) 2015-09-09
US20150354991A1 (en) 2015-12-10

Similar Documents

Publication Publication Date Title
EP2946174A1 (fr) Arrangement de bobines comportant deux bobines
EP1832851B1 (fr) Indicateur de position pour un élément de commande, moteur linéaire et procédé de fabrication d'un moteur linéaire
EP3198233B1 (fr) Capteur de position
WO2012022300A2 (fr) Procédé et dispositif pour détecter des champs magnétiques
EP2359097B1 (fr) Ensemble capteur et procédé pour déterminer la position et/ou le changement de position d'un objet de mesure
EP2149784B1 (fr) Système de capteur de trajectoire magnétique
EP3108210B1 (fr) Dispositif de détection et procédé de détermination d'une position et/ou d'un changement de position d'un objet à mesurer
EP0554417B1 (fr) Dispositif de mesure pour la determination sans contact du deplacement ou de l'angle de rotation d'un composant
EP3417245B1 (fr) Capteur
DE102006061771B4 (de) Magnetischer Wegsensor mit linearer Kennlinie des Ausgangssignals
DE102012005344B4 (de) Berührungsloser weggeber nach dem plcd-prinzip
DE102015212497A1 (de) Vorrichtung zur Überwachung eines Magnetkerns und Verfahren zur Erfassung eines Sättigungsverhaltens eines zu überwachenden Magnetkerns
DE10342473B4 (de) Magnetischer Wegsensor
DE102012218605A1 (de) Induktiver Schaltpunktsensor, insbesondere für eine Kolben-Zylinder-Anordnung einer Kupplungsbetätigungsvorrichtung
EP3417244B1 (fr) Capteur
EP1516160A2 (fr) Bobine de detection et capteur de mesure de deplacement
DE102011010682B3 (de) Spulenanordnung und Sensor
WO1986007145A1 (fr) Agencement a capteur
EP3070436B1 (fr) Systeme de mesure de position comprenant des moyens d'etalonnage
DE102008011971A1 (de) Magnetisches Wegsensorsystem
DE102018209216A1 (de) Positionsbestimmung für einen von einem Zweipunktregler bestromten Aktuator
DE102019132963B4 (de) Strommessanordnung
DE102017202421A1 (de) Induktiver Positionssensor mit koaxialer Spulenanordnung
WO2016008481A1 (fr) Système de détecteur et ensemble piston-cylindre
DE10253107B4 (de) Sensorspule und Wegmesssensor

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20150603

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

AX Request for extension of the european patent

Extension state: BA ME

DAX Request for extension of the european patent (deleted)
17Q First examination report despatched

Effective date: 20160803

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20170214