CN104700988A - Three-phase broadband composite inductor and EMI filtering electric appliance device with the same - Google Patents
Three-phase broadband composite inductor and EMI filtering electric appliance device with the same Download PDFInfo
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- CN104700988A CN104700988A CN201510119531.7A CN201510119531A CN104700988A CN 104700988 A CN104700988 A CN 104700988A CN 201510119531 A CN201510119531 A CN 201510119531A CN 104700988 A CN104700988 A CN 104700988A
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Abstract
The invention provides a three-phase broadband composite inductor and an EMI filtering electric appliance device with the three-phase broadband composite inductor. The three-phase broadband composite inductor comprises a main magnetic core, three coils and a Y-shaped magnetic bridge. Three notches formed in an annular array mode are formed in the inner side wall of the main magnetic core. The three ends of the Y-shaped magnetic bridge are installed and inserted in the three notches of the main magnetic core in a one-to-one corresponding mode. The three coils are wound between the three notches of the main magnetic core. Protruding blocks used for preventing the three coils from making contact with one another are arranged on the two sides of each notch respectively. Gaps are formed between the ends of the Y-shaped magnetic bridge and the notches. According to the three-phase broadband composite inductor, the main magnetic core and the Y-shaped magnetic bridge are of a separable structure, the main magnetic core and the Y-shaped magnetic bridge can be separated firstly and then combined after winding is completed in the winding process, the winding difficulty can be lowered, and the winding efficiency can be improved; in addition, the protruding blocks on the two sides of the notches of the main magnetic core can effectively prevent the three coils from making contact with one another, the coils can be easily obtained through winding, the positions of the coils are limited, it is ensured that an enough electrical gap is formed between every two adjacent coils, and the quality of the inductor is greatly improved.
Description
Technical field
The invention belongs to inductance field, particularly relate to a kind of three-phase wideband compound inductance and adopt the EMI filtered electrical apparatus of this inductance.
Background technology
Along with popularizing of circuit high frequency, present various threephase switch power supply, UPS, particularly photovoltaic parallel in system, frequency converter, power electronic equipment, network communication apparatus, automatic control equipment, Three-phase electric-wave filter all will be used to suppress Conducted Electromagnetic Interference in the front end of the circuit such as robot, the electromagnetic interference making itself produce is unlikely to pollute electromagnetic environment, also makes the electromagnetic interference from environment be unlikely to affect it and normally works.Electromagnetic interference often comprises common and different mode, and be mix together, be difficult to explanation, and frequency range is more and more wider, therefore the Three-phase electric-wave filter of high-quality, all requirement can filtering common mode interference, again can filtering differential mode interference, and therefore common mode inductance has become the requisite magnetic element of high-Q filter with differential mode inductance.Existing common mode inductance has again the filter volume of poor inductance large, and cost is high, and thus finding a kind of three-phase wideband compound inductance having common and different mode concurrently becomes inevitable, and magnetic core is the core of inductance.
The magnetic core of existing three-phase common mode inductance is generally ring type magnetic core 1 as shown in Figure 1 or EI type magnetic core 2 as shown in Figure 2.Although ring type magnetic core 1 has high magnetic permeability, on magnetic core, three groups of coils of direct coiling easily cause electric clearance not enough because contacting with each other, and affect the quality of inductance.And with the three-phase common mode inductance that EI type magnetic core 2 designs and produces, need an E type and an I type magnetic core to be combined, due to the seamed gap of contact end face of the two, so permeability is relatively low, be difficult to the three-phase common mode inductance designing high-quality.In addition, the three-phase common mode inductance designed and produced with ring type magnetic core 1 or EI type magnetic core 2, its differential-mode component is all very little, only has less than 1% of common mode inductance through actual measurement.
Summary of the invention
The object of the present invention is to provide and be a kind ofly easy to coiling, inductance quality can be improved, cost is low, have the three-phase wideband compound inductance of enough differential-mode components.
For achieving the above object, the invention provides a kind of three-phase wideband compound inductance, comprise main magnetic core, three groups of coils and Y shape magnetic bridge; The madial wall of described main magnetic core is provided with the recess of three circular array, and three ends of described Y shape magnetic bridge assign in three recesses of main magnetic core one to one; Described three groups of coils are wrapped between two recesses of main magnetic core respectively, and the both sides of the recess of described main magnetic core are respectively equipped with a projection for preventing three groups of coils from contacting with each other; Gap is provided with between the end of described Y shape magnetic bridge and recess.
Wherein, the cross section of described main magnetic core is octagon, and the outer surface of main magnetic core is provided with chamfering.
Wherein, described main magnetic core is the wide band manganese-zinc magnetic ferrite magnetic core that initial permeability is greater than 4000 μ, and the surface spraying of main magnetic core has insulating barrier; Described Y shape magnetic bridge is Mn-Zn soft magnetic ferrite magnetic bridge or Ni-Zn soft magnetic ferrite magnetic bridge.
Wherein, three recesses on described main magnetic core and the gap between three ends of Y shape magnetic bridge are 0.05mm ~ 0.8mm.
Wherein, the width of described recess is 1.5mm ~ 5mm, and the degree of depth of described recess is 1/5 ~ 3/5 of main magnetic core thickness; Described projection is 0.2mm ~ 1.5mm by the height of the madial wall projection of main magnetic core.
For achieving the above object, the present invention also provides a kind of EMI filtered electrical apparatus adopting three-phase wideband compound inductance, and the three-phase wideband compound inductance of employing comprises main magnetic core, three groups of coils and Y shape magnetic bridge; The madial wall of described main magnetic core is provided with the recess of three circular array, and three ends of described Y shape magnetic bridge assign in three recesses of main magnetic core one to one; Described three groups of coils are wrapped between two recesses of main magnetic core respectively, and the both sides of the recess of described main magnetic core are respectively equipped with a projection for preventing three groups of coils from contacting with each other; Gap is provided with between the end of described Y shape magnetic bridge and recess.
Wherein, the cross section of described main magnetic core is octagon, and the outer surface of main magnetic core is provided with chamfering.
Wherein, described main magnetic core is the wide band manganese-zinc magnetic ferrite magnetic core that initial permeability is greater than 4000 μ, and the surface spraying of main magnetic core has insulating barrier; Described Y shape magnetic bridge is Mn-Zn soft magnetic ferrite magnetic bridge or Ni-Zn soft magnetic ferrite magnetic bridge.
Wherein, three recesses on described main magnetic core and the gap between three ends of Y shape magnetic bridge are 0.05mm ~ 0.8mm.
Wherein, the width of described recess is 1.5mm ~ 5mm, and the degree of depth of described recess is 1/5 ~ 3/5 of main magnetic core thickness; Described projection is 0.2mm ~ 1.5mm by the height of the madial wall projection of main magnetic core.
The invention has the beneficial effects as follows: three-phase wideband compound inductance provided by the invention, main magnetic core and Y shape magnetic bridge are separable structure, and can be first separated with Y shape magnetic bridge by main magnetic core during coiling, coiling terminates rear recombinant, can reduce coiling difficulty, improve winding efficiency; And the projection in main magnetic core recess both sides effectively can prevent three groups of coils from contacting with each other and cause electric clearance not enough, and be not only easy to coiling, also limit the position of coil, both guarantees have enough electric clearances, substantially increase inductance quality; And, be provided with gap between the end of Y shape magnetic bridge and recess, under the effect of Y shape magnetic bridge, form a point magnetic circuit, because of the existence in gap, a point magnetic circuit all the time can not be saturated, thus ensure that product had both had enough common mode inductances, there is again enough differential-mode components, form a kind of wideband compound inductance.
In addition, with the Three-phase electric-wave filter that this three-phase wideband compound inductance makes, without the need to arranging three independently differential mode inductances save three X electric capacity, simplify circuit structure, save the space of pcb board, reduce the loss of filter, also reduce product cost simultaneously, and have better EMI filtering performance.
Accompanying drawing explanation
Fig. 1 is the structure chart of three-phase common mode inductance of the prior art ring type magnetic core used;
Fig. 2 is the structure chart of three-phase common mode inductance of the prior art EI type magnetic core used;
Fig. 3 is the structure chart of three-phase wideband compound inductance of the present invention;
Fig. 4 is the structure chart of the ring-type main magnetic core of three-phase wideband compound inductance of the present invention;
Fig. 5 is the structure chart of the Y shape magnetic bridge of three-phase wideband compound inductance of the present invention;
Fig. 6 is the cutaway view of Fig. 4 along A-A line;
Fig. 7 is the electrical schematic diagram of the filter using three-phase wideband compound inductance provided by the invention;
Fig. 8 is the electrical schematic diagram of the filter using common mode inductance of the prior art;
The structure chart of the subtriangular main magnetic core of Fig. 9 three-phase of the present invention wideband compound inductance.
Main element symbol description is as follows:
1, ring type magnetic core 2, EI type magnetic core
3, main magnetic core 4, Y shape magnetic bridge
5, coil 6, projection
7, recess.
Embodiment
Consult Fig. 3-5, three-phase wideband compound inductance provided by the invention, comprise main magnetic core 3, three groups of coils 5 and Y shape magnetic bridge 4; The madial wall of main magnetic core 3 is provided with the recess 7 of three circular array, and three ends of Y shape magnetic bridge 4 assign in three recesses 7 of main magnetic core 3 one to one; Three groups of coils 5 are wrapped between two recesses 7 of main magnetic core 3 respectively, and the both sides of the recess 7 of main magnetic core 3 are respectively equipped with a projection 6 for preventing three groups of coils 5 from contacting with each other; Gap is provided with between the end of Y shape magnetic bridge 4 and recess 7.
Main magnetic core 3 both can be ring-type, as shown in Figure 4, also can be subtriangular, as shown in Figure 9.
Compared to prior art, three-phase wideband compound inductance provided by the invention, main magnetic core 3 and Y shape magnetic bridge 4 are separable structure, and can be first separated with Y shape magnetic bridge 4 by main magnetic core 3 during coiling, coiling terminates rear recombinant, can reduce coiling difficulty, improve winding efficiency; And effectively can prevent three groups of coils 5 from contacting with each other at the projection 6 of main magnetic core 3 recess 7 both sides and cause electric clearance not enough, be not only easy to coiling 5, also limit the position of coil 5, both guarantees have enough electric clearances, substantially increase inductance quality; And, be provided with gap between the end of Y shape magnetic bridge 4 and recess 7, under the effect of Y shape magnetic bridge 4, form a point magnetic circuit, because of the existence in gap, a point magnetic circuit all the time can not be saturated, thus ensure that product had both had enough common mode inductances, there is again enough differential-mode components, form a kind of wideband compound inductance.
Consult Fig. 7 and Fig. 8, in addition, with the Three-phase electric-wave filter that this three-phase wideband compound inductance makes, without the need to arranging three independently differential mode inductances save three X electric capacity, simplify circuit structure, save the space of pcb board, reduce the loss of filter, also reduce product cost simultaneously, and have better EMI filtering performance.
Consult Fig. 6, in the present embodiment, the cross section of main magnetic core 3 is octagon, and the outer surface of main magnetic core 3 is provided with chamfering.When coiling, coil 5 can be close to the outer surface of main magnetic core 3 and can not arch upward, thus reaches the object shortening length of wires, save wire rod, and drawn by actual measurement, the present embodiment compares existing product can save wire rod 3% ~ 10%.
Certainly, this is only a specific embodiment of the present invention, and the shape of the cross section of main magnetic core 3 of the present invention is not limited in this, also can be the shape that other are easy to coiling.
In the present embodiment, main magnetic core 3 is wide band manganese-zinc magnetic ferrite magnetic cores that initial permeability is greater than 4000 μ, and the surface spraying of main magnetic core 3 has insulating barrier.Y shape magnetic bridge 4 is Mn-Zn soft magnetic ferrite magnetic bridge or Ni-Zn soft magnetic ferrite magnetic bridge: when Y shape magnetic bridge 4 is for Mn-Zn soft magnetic ferrite magnetic bridge, equally need at surface spraying insulating barrier with main magnetic core 3; In addition, also can use and not need through spray insulation process, but have the Ni-Zn soft magnetic ferrite of more than 1000V dielectric voltage withstand performance.
Main magnetic core 3 selects initial permeability to be greater than the wide band manganese-zinc soft magnetic ferrite of 4000 μ as material, thermal sintering is carried out with the high temperature of 1300 ~ 1450 DEG C, there is good broadband properties, and then form three-phase wideband compound inductance, through actual measurement, compared to existing technologies, the differential-mode component of the compound common mode inductance of this wideband octuple about higher than the differential-mode component of common common mode inductance.
Certainly, this is only a specific embodiment of the present invention, and the concrete material of main magnetic core 3 of the present invention and Y shape magnetic bridge 4 is not limited thereto, and also can be other materials.
In the present embodiment, three recesses 7 on main magnetic core 3 and the gap between three ends of Y shape magnetic bridge 4 are 0.05mm ~ 0.8mm.The width of recess 7 is 1.5mm ~ 5mm, and the degree of depth of recess 7 is 1/5 ~ 3/5 of main magnetic core 3 thickness; Projection 6 is 0.2mm ~ 1.5mm by the height of the madial wall projection of main magnetic core 3.
Above size is all through the optimum value of repeatedly testing and drawing, but this does not also mean that the size limitations of above-mentioned parts of the present invention is in this, certainly, numerically can fluctuate above-mentioned yet.
Three-phase wideband compound inductance provided by the invention, the number of turns of three groups of coils 5 on main magnetic core 3 is identical, phase place is identical and winding mode is identical, and both can be common winding, also can be that advanced flat wire founds winding.
These are only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the prerequisite not departing from the technology of the present invention principle; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (10)
1. a three-phase wideband compound inductance, is characterized in that, comprises main magnetic core, three groups of coils and Y shape magnetic bridge; The madial wall of described main magnetic core is provided with the recess of three circular array, and three ends of described Y shape magnetic bridge assign in three recesses of main magnetic core one to one; Described three groups of coils are wrapped between two recesses of main magnetic core respectively, and the both sides of the recess of described main magnetic core are respectively equipped with a projection for preventing three groups of coils from contacting with each other; Gap is provided with between the end of described Y shape magnetic bridge and recess.
2. three-phase wideband compound inductance according to claim 1, is characterized in that, the cross section of described main magnetic core is octagon, and the outer surface of main magnetic core is provided with chamfering.
3. three-phase wideband compound inductance according to claim 1, it is characterized in that, described main magnetic core is the wide band manganese-zinc magnetic ferrite magnetic core that initial permeability is greater than 4000 μ, and the surface spraying of main magnetic core has insulating barrier; Described Y shape magnetic bridge is Mn-Zn soft magnetic ferrite magnetic bridge or Ni-Zn soft magnetic ferrite magnetic bridge.
4. three-phase wideband compound inductance as claimed in claim 1, it is characterized in that, three recesses on described main magnetic core and the gap between three ends of Y shape magnetic bridge are 0.05mm ~ 0.8mm.
5. three-phase wideband compound inductance as claimed in claim 1, it is characterized in that, the width of described recess is 1.5mm ~ 5mm, and the degree of depth of described recess is 1/5 ~ 3/5 of main magnetic core thickness; Described projection is 0.2mm ~ 1.5mm by the height of the madial wall projection of main magnetic core.
6. adopt an EMI filtered electrical apparatus for three-phase wideband compound inductance, it is characterized in that, the three-phase wideband compound inductance of employing comprises main magnetic core, three groups of coils and Y shape magnetic bridge; The madial wall of described main magnetic core is provided with the recess of three circular array, and three ends of described Y shape magnetic bridge assign in three recesses of main magnetic core one to one; Described three groups of coils are wrapped between two recesses of main magnetic core respectively, and the both sides of the recess of described main magnetic core are respectively equipped with a projection for preventing three groups of coils from contacting with each other; Gap is provided with between the end of described Y shape magnetic bridge and recess.
7. the EMI filtered electrical apparatus of employing three-phase wideband compound inductance according to claim 6, it is characterized in that, the cross section of described main magnetic core is octagon, and the outer surface of main magnetic core is provided with chamfering.
8. the EMI filtered electrical apparatus of employing three-phase wideband compound inductance according to claim 6, it is characterized in that, described main magnetic core is the wide band manganese-zinc magnetic ferrite magnetic core that initial permeability is greater than 4000 μ, and the surface spraying of main magnetic core has insulating barrier; Described Y shape magnetic bridge is Mn-Zn soft magnetic ferrite magnetic bridge or Ni-Zn soft magnetic ferrite magnetic bridge.
9. the EMI filtered electrical apparatus of employing three-phase wideband compound inductance according to claim 6, is characterized in that, three recesses on described main magnetic core and the gap between three ends of Y shape magnetic bridge are 0.05mm ~ 0.8mm.
10. the EMI filtered electrical apparatus of employing three-phase wideband compound inductance according to claim 6, it is characterized in that, the width of described recess is 1.5mm ~ 5mm, and the degree of depth of described recess is 1/5 ~ 3/5 of main magnetic core thickness; Described projection is 0.2mm ~ 1.5mm by the height of the madial wall projection of main magnetic core.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510119531.7A CN104700988A (en) | 2015-03-15 | 2015-03-15 | Three-phase broadband composite inductor and EMI filtering electric appliance device with the same |
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| CN201510119531.7A CN104700988A (en) | 2015-03-15 | 2015-03-15 | Three-phase broadband composite inductor and EMI filtering electric appliance device with the same |
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| CN104700988A true CN104700988A (en) | 2015-06-10 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106158250A (en) * | 2016-09-18 | 2016-11-23 | 田村（中国）企业管理有限公司 | A kind of ring-shaped inductors |
| CN106601431A (en) * | 2016-11-08 | 2017-04-26 | 合肥博微田村电气有限公司 | Common-mode and differential-mode inductor |
| CN107293389A (en) * | 2017-07-03 | 2017-10-24 | 华为技术有限公司 | Integrated inductor |
| US10566897B2 (en) | 2018-03-29 | 2020-02-18 | Delta Electronics, Inc. | DC converter, DC converter group and method of connecting the same |
| US20200253002A1 (en) * | 2017-10-25 | 2020-08-06 | Electrolux Appliances Aktiebolag | Induction hob comprising an electromagnetic interference filter |
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| JP2013074084A (en) * | 2011-09-28 | 2013-04-22 | Mitsubishi Electric Corp | Filter reactor and method for manufacturing the same |
| CN204204550U (en) * | 2014-12-05 | 2015-03-11 | 钟显华 | The compound inductance of a kind of wideband |
| CN204424050U (en) * | 2015-03-15 | 2015-06-24 | 钟显华 | Three-phase wideband compound inductance |
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2015
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Patent Citations (7)
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| DE2259153A1 (en) * | 1971-12-02 | 1973-06-07 | Lucas Aerospace Ltd | METHOD OF MANUFACTURING A CONVERTER |
| JPS5373352A (en) * | 1976-12-13 | 1978-06-29 | Fujitsu Ltd | Multiiphase choke coil |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106158250A (en) * | 2016-09-18 | 2016-11-23 | 田村（中国）企业管理有限公司 | A kind of ring-shaped inductors |
| CN106601431A (en) * | 2016-11-08 | 2017-04-26 | 合肥博微田村电气有限公司 | Common-mode and differential-mode inductor |
| CN107293389A (en) * | 2017-07-03 | 2017-10-24 | 华为技术有限公司 | Integrated inductor |
| CN107293389B (en) * | 2017-07-03 | 2019-06-21 | 华为技术有限公司 | Integrated inductor |
| US20200253002A1 (en) * | 2017-10-25 | 2020-08-06 | Electrolux Appliances Aktiebolag | Induction hob comprising an electromagnetic interference filter |
| US10566897B2 (en) | 2018-03-29 | 2020-02-18 | Delta Electronics, Inc. | DC converter, DC converter group and method of connecting the same |
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