CN105590719A - Common-mode filter and iron core thereof - Google Patents
Common-mode filter and iron core thereof Download PDFInfo
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- CN105590719A CN105590719A CN201410580118.6A CN201410580118A CN105590719A CN 105590719 A CN105590719 A CN 105590719A CN 201410580118 A CN201410580118 A CN 201410580118A CN 105590719 A CN105590719 A CN 105590719A
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Abstract
The invention discloses a common-mode filter and an iron core thereof. The common-mode filter comprises an iron core body, and a first wall and a second wall on two sides the iron core body, and a first coil, and a second coil. The first wall is provided with a first projection portion and a second projection portion. The second wall is provided with a third projection portion and a fourth projection portion. The iron core body is further provided with a U-shaped projection portion. The U-shaped projection portion divides the iron core body into a first winding portion, an overline portion, and a second winding portion. The first coil is winded on the first winding portion, the overline portion, and the second winding portion. The second coil is winded on the first winding portion, the overline portion, and the second winding portion. The number of turns of the first coil and the second coil winded on the overline portion is lower than 1.
Description
Technical field
The invention relates to a kind of espespecially a kind of common-mode filter and iron core thereof that can simultaneously suppress high frequency noise and low frequency noise.
Background technology
Common-mode filter (commonmodefilter) is two inductors that magnetic intercouples, for the transmission path that inserts circuit to eliminate or to reduce the common mode noise electric current (common-modenoisecurrent) of circuit. Figure 1 shows that known common-mode filter the first embodiment, it is mainly on an iron core axis 100, to be arranged with one first coil 10 and one second coil 20, and wherein this first coil 10 and this second coil 20 are simultaneously parallel and be around in the individual layer of this iron core axis 100 winding structure around (single-layerwithpairofwires). The end of this first coil 10 and the second coil 20 is connected on the two side ends electrode of iron core axis 100. In the time that the common mode current containing in the electric current of noise passes through this common-mode filter, this common mode current can produce magnetic field in the same way on the first coil 10 and the second coil 20, thereby the inductance that increases this first coil 10 and the second coil 20 resists (inductivereactance), and then make this common-mode filter present high impedance characteristic, also can produce higher common code impedance (commonmodeimpedance), with attenuation common-mode noise electric current, and then can reach the object of filtering common mode noise.
The first embodiment of this known common-mode filter, though can reach the object of filtering common mode noise, but this first coil 10 and the second coil 20 are set around on this iron core axis 100, to making this iron core axis 100 deficiencies, the maybe essential volume that increases this iron core axis 100, and then cause the volume of this common-mode filter and weight cause more greatly applicability limited outside, and increase cost.
Figure 2 shows that known common-mode filter the second embodiment. Known common-mode filter the second embodiment is arranged with one first coil 10 and one second coil 20 on an iron core axis 100, the end of this first coil 10 and the second coil 20 is connected on the two side ends electrode of iron core axis 100, wherein, this first coil 10 and this second coil 20 are that the bilayer that these the second coil 20 lap wounds are located on this first coil 10 divides the winding structure around (double-layerwithseparateofwires) for after this first coil 10 is first set around this iron core axis 100.
Although this second embodiment that commonly uses common-mode filter can reduce volume and the weight of this common-mode filter iron core in a large number, but because the first coil 10 and second coil 20 of this common-mode filter are overlapped, except increasing the stray capacitance of common-mode filter, and increase the layer capacitance of the first coil 10 and the second coil 20. Thus, this common-mode filter is poor for the inhibition ability of high frequency noise, so cause product practicality and applicability limited.
Figure 3 shows that known common-mode filter the 3rd embodiment. Known common-mode filter the 3rd embodiment is arranged with one first coil 10 and one second coil 20 on an iron core axis 100, the end of this first coil 10 and the second coil 20 is connected on the two side ends electrode of iron core axis 100, wherein, this first coil 10 is for the while is parallel and be set around the double-deck of this iron core axis 100 and the winding structure around (double-layerwithpairofwires) with this second coil 20.
Similar to this second embodiment that commonly uses common-mode filter, this 3rd embodiment that commonly uses common-mode filter also reduces volume and the weight of this common-mode filter iron core in a large number. But because the first coil 10 and second coil 20 of this common-mode filter are overlapped, except increasing the stray capacitance of common-mode filter, and increase the layer capacitance of the first coil 10 and the second coil 20. Thus, this common-mode filter is poor for the inhibition ability of high frequency noise, so cause product practicality and applicability limited.
Because the shortcoming of above-mentioned known common-mode filter, it does not reach perfection inventor's thoughts, hereat, how to be improved for above-mentioned disappearance, is the technical difficulties place that this case inventor institute wish solves.
Summary of the invention
For solving the problems of the technologies described above, the invention discloses a kind of common-mode filter, comprise: an iron core axis, both sides are provided with one first body of wall and one second body of wall, and wherein, this first body of wall is provided with one first protuberance and one second protuberance; This second body of wall is provided with one the 3rd protuberance and one the 4th protuberance, this iron core axis is further provided with a U-shaped protuberance, wherein this iron core axial area is divided into one first winding section, a cross-line portion and one second winding section by this U-shaped protuberance, one first coil, be set around this first winding section, this cross-line portion and this second winding section, and one second coil, be set around this first winding section, this cross-line portion and this second winding section, wherein, the number of turns that this first coil and this second coil are set around this cross-line portion is less than 1.
The present invention also provides a kind of common-mode filter iron core, comprises: an iron core axis, and both sides are provided with one first body of wall and one second body of wall, and wherein, this first body of wall is provided with one first protuberance and one second protuberance; This second body of wall is provided with one the 3rd protuberance and one the 4th protuberance; This iron core axis is further provided with a U-shaped protuberance, and wherein, this iron core axial area is divided into one first winding section, a cross-line portion and one second winding section by this U-shaped protuberance.
Main purpose of the present invention is providing the common-mode filter iron core axis of the U-shaped protuberance of a kind of tool, to promote the inhibition ability of common-mode filter for high frequency noise, and then improving product practicality and applicability.
Of the present invention time an object is providing the common-mode filter iron core axis of the U-shaped protuberance of tool, and itself and common-mode filter iron core are one-body molded, and overall structure is simple.
Brief description of the drawings
Fig. 1 is the schematic diagram of known common-mode filter the first embodiment;
Fig. 2 is the schematic diagram of known common-mode filter the second embodiment;
Fig. 3 is the schematic diagram of known common-mode filter the 3rd embodiment;
Fig. 4 is the schematic diagram of the first embodiment of common mode filtering body of the present invention;
Fig. 5 is the floor map of the first embodiment of common mode filtering body of the present invention, and it comprises (a) top view; (b) front view; (c) side view; (d) lower view;
Fig. 6 is the schematic diagram of the second embodiment of common mode filtering body of the present invention;
Fig. 7 is the floor map of the second embodiment of common mode filtering body of the present invention, and it comprises (a) top view; (b) front view; (c) side view; (d) lower view;
Fig. 8 is the schematic diagram of the 3rd embodiment of common mode filtering body of the present invention;
Fig. 9 is the 3rd embodiment floor map of common mode filtering body of the present invention, and it comprises (a) top view; (b) front view; (c) side view; (d) lower view.
Figure number explanation:
10: the first coils
20: the second coils
10-1,10-2,20-1,20-2: line end
100: iron core axis
101: the first bodies of wall
102: the second bodies of wall
103: the first protuberances
104: the second protuberances
105: the three protuberances
106: the four protuberances
107:U type protuberance
108: the first winding sections
109: cross-line portion
110: the second winding sections
400: the schematic diagram of common-mode filter the first embodiment of the present invention
600: the schematic diagram of common-mode filter the second embodiment of the present invention
800: the schematic diagram of common-mode filter of the present invention the 3rd embodiment.
Detailed description of the invention
To embodiments of the invention be provided to detailed explanation below. Although the present invention sets forth in connection with embodiment, should understand this and not mean to limit the invention to these embodiment. On the contrary, the invention is intended to contain defined various variations, amendment and equipollent in the spirit and scope of the invention being defined by front attached claim.
Should understand diagram and proportionally not draw, and only describe wherein part-structure, and show each layer of these structures of stroke.
In addition, also can be in conjunction with other processing procedure and step processing procedure and the step of place discussion therewith, that is, herein before the shown and step described, middle and/or can have afterwards multiple processing procedure and a step. Importantly, embodiments of the invention can be in conjunction with other processing procedures and steps and are implemented it, can't cause significant impact to it. Generally speaking, the present invention's various embodiment can replace some part of conventional process, and can not cause significant impact to its periphery processing procedure and step.
For fully understanding object, feature and effect of the present invention, hereby by following specific embodiment, and coordinate appended graphicly, the present invention is described in detail, be described as follows. As shown in Figure 4, for according to the schematic diagram of first embodiment of the invention common-mode filter 400. For clarity sake, the floor map of first embodiment of the invention common-mode filter 400, as shown in Figure 5, it comprises (a) top view; (b) front view; (c) side view; (d) lower view.
First embodiment of the invention common-mode filter 400 comprises an iron core axis 100, and both sides are provided with one first body of wall 101 and one second body of wall 102, and wherein, this first body of wall 101 is provided with one first protuberance 103 and one second protuberance 104; This second body of wall 102 is provided with one the 3rd protuberance 105 and one the 4th protuberance 106. In one embodiment, the material of this iron core axis 100 is a ferrous oxide (Ferrite). In one embodiment, the material of this ferrous oxide (Ferrite) is nickel zinc (Ni-Zn), MnZn (Mn-Zn) or aluminium oxide ceramics (Ceramic).
This iron core axis 100 is further provided with a U-shaped protuberance 107, and this U-shaped protuberance 107 is arranged between this first body of wall 101 and this second body of wall 102, and this iron core axis 100 is divided into one first winding section 108, a cross-line portion 109 and one second winding section 110.
In one embodiment, this first body of wall 101, this second body of wall 102, this iron core axis 100 are one-body molded with this U-shaped protuberance 107, this first protuberance 103, this second protuberance 104, the 3rd protuberance 105 with the 4th protuberance 106, therefore, common-mode filter overall structure is quite simple.
One first coil 10 and one second coil 20, simultaneously behind parallel the first winding section 108 that is set around this iron core axis 100, through follow-up parallel this second winding section 110 that is set around simultaneously of this cross-line portion 109. In one embodiment, this first coil 10, be set around in order this first winding section 108, this cross-line portion 109 and this second winding section 110, and this second coil 20, be set around in order this first winding section 108, this cross-line portion 109 and this second winding section 110, and this first coil 10 is less than 1 with the number of turns that this second coil 20 is set around this cross-line portion 109.
In another embodiment, this first coil 10 and this second coil 20 are set around the surface of this iron core axis 100, and wherein the number of turns of this first coil 10 and the number of turns essence of this second coil 20 equate.
This first protuberance 103, this second protuberance 104, the 3rd protuberance 105 are provided with a metallization terminal (not shown) with the 4th protuberance 106. In one embodiment, the material of this metallization terminal is made up of silver, nickel, gold or silver, nickel, tin. The line end 10-1 of this first coil 10 and 10-2 respectively with this first protuberance 103 on this metallization terminal and this metallization terminal on the 3rd protuberance 105 couple, the line end 20-1 of this second coil 20 and 20-2 respectively with this second protuberance 104 on this metallization terminal and this metallization terminal on the 4th protuberance 106 couple. In one embodiment, this first coil 10 equates with the number of turns essence that this second coil 20 is set around this iron core axis 100.
As shown in Figure 6, for according to the schematic diagram of second embodiment of the invention common-mode filter 600. For clarity sake, the floor map of second embodiment of the invention common-mode filter 600, as shown in Figure 7, it comprises (a) top view; (b) front view; (c) side view; (d) lower view.
Second embodiment of the invention common-mode filter 600 comprises an iron core axis 100, and both sides are provided with one first body of wall 101 and one second body of wall 102, and wherein, this first body of wall 101 is provided with one first protuberance 103 and one second protuberance 104; This second body of wall 102 is provided with one the 3rd protuberance 105 and one the 4th protuberance 106. In one embodiment, the material of this iron core axis 100 is ferrous oxide (Ferrite). In one embodiment, the material of this ferrous oxide (Ferrite) is nickel zinc (Ni-Zn), MnZn (Mn-Zn) or aluminium oxide ceramics (Ceramic).
This iron core axis 100 is further provided with a U-shaped protuberance 107, and this U-shaped protuberance 107 is arranged between this first body of wall 101 and this second body of wall 102, and this iron core axis 100 is divided into one first winding section 108, a cross-line portion 109 and one second winding section 110.
In one embodiment, this first body of wall 101, this second body of wall 102, this iron core axis 100 are one-body molded with this U-shaped protuberance 107, this first protuberance 103, this second protuberance 104, the 3rd protuberance 105 with the 4th protuberance 106, therefore, common-mode filter overall structure is quite simple.
One first coil 10, is set around behind this first winding section 108 of this iron core axis 100 after this cross-line portion 109, is continuously set around this second winding section 110 to form a wire winding layer. One second coil 20 is set around behind this first winding section 108 on this wire winding layer, after this cross-line portion 109, continuous this second winding section 110 that is set around this wire winding layer. In one embodiment, this first coil 10 number of turns of being set around this cross-line portion 109 parallel with this second coil 20 is less than 1.
In one embodiment, this the first coil 10 is set around the surface of this iron core axis 100, and be set around in order this first winding section 108, this cross-line portion 109 and this second winding section 110, and this second coil 20, be set around in order this first winding section 108, this cross-line portion 109 and this second winding section 110, and the number of turns of this first coil 10 equates with the number of turns essence of this second coil 20.
This first protuberance 103, this second protuberance 104, the 3rd protuberance 105 are provided with a metallization terminal (not shown) with the 4th protuberance 106. In one embodiment, the material of this metallization terminal is made up of silver, nickel, gold or silver, nickel, tin. The line end 10-1 of this first coil 10 and 10-2 respectively with this first protuberance 103 on this metallization terminal and this metallization terminal on the 3rd protuberance 105 couple, the line end 20-1 of this second coil 20 and 20-2 respectively with this second protuberance 104 on this metallization terminal and this metallization terminal on the 4th protuberance 106 couple.
As shown in Figure 8, for according to the schematic diagram of third embodiment of the invention common-mode filter 800. For clarity sake, the floor map of third embodiment of the invention common-mode filter 800, as shown in Figure 9, it comprises (a) top view; (b) front view; (c) side view; (d) lower view.
Third embodiment of the invention common-mode filter 800 comprises an iron core axis 100, and both sides are provided with one first body of wall 101 and one second body of wall 102, and wherein, this first body of wall 101 is provided with one first protuberance 103 and one second protuberance 104; This second body of wall 102 is provided with one the 3rd protuberance 105 and one the 4th protuberance 106. In one embodiment, the material of this iron core axis 100 is ferrous oxide (Ferrite). In one embodiment, the material of this ferrous oxide (Ferrite) is nickel zinc (Ni-Zn), MnZn (Mn-Zn) or aluminium oxide ceramics (Ceramic).
This iron core axis 100 is further provided with a U-shaped protuberance 107, and this U-shaped protuberance 107 is arranged between this first body of wall 101 and this second body of wall 102, and this iron core axis 100 is divided into one first winding section 108, a cross-line portion 109 and one second winding section 110.
In one embodiment, this first body of wall 101, this second body of wall 102, this iron core axis 100 and this U-shaped protuberance 107, this first protuberance 103, this second protuberance 104, the 3rd protuberance 105 and the 4th protuberance 106, be one-body molded, therefore, common-mode filter overall structure is quite simple.
One first coil 10 and one second coil 20, simultaneously and be set around behind the first winding section 108 of this iron core axis 100, after this cross-line portion 109, continuous be also set around this second winding section 110, and this first coil 10 and this second coil 20 number of turns that is set around this cross-line portion 109 are less than 1 simultaneously. In one embodiment, at least one part of this second coil is set around on this first coil, and the number of turns of this first coil 10 equates with the number of turns essence of this second coil 20.
This first protuberance 103, this second protuberance 104, the 3rd protuberance 105 are provided with a metallization terminal (not shown) with the 4th protuberance 106. In one embodiment, the material of this metallization terminal is made up of silver, nickel, gold or silver, nickel, tin. The line end 10-1 of this first coil 10 and 10-2 respectively with this first protuberance 103 on this metallization terminal and this metallization terminal on the 3rd protuberance 105 couple, the line end 20-1 of this second coil 20 and 20-2 respectively with this second protuberance 104 on this metallization terminal and this metallization terminal on the 4th protuberance 106 couple.
Above detailed description of the invention and accompanying drawing are only conventional embodiment of the present invention. Obviously, under the prerequisite that does not depart from the present invention's spirit that claims define and invention scope, can there be various supplements, amendment and replacement. It should be appreciated by those skilled in the art that the present invention can change to some extent in form, structure, layout, ratio, material, element, element and other side according to concrete environment and job requirement in actual applications under the prerequisite that does not deviate from invention criterion. Therefore, be only illustrative rather than definitive thereof at the embodiment of this disclosure, scope of the present invention is defined by claims and legal equivalents thereof, and is not limited to description before this.
Claims (10)
1. a common-mode filter, is characterized in that, comprises:
One iron core axis, both sides are provided with one first body of wall and one second body of wall, and this first body of wall is provided with one first protuberance and one second protuberance; This second body of wall is provided with one the 3rd protuberance and one the 4th protuberance, and wherein, this iron core axis is further provided with a U-shaped protuberance, and wherein, this iron core axial area is divided into one first winding section, a cross-line portion and one second winding section by this U-shaped protuberance;
One first coil, is set around this first winding section, this cross-line portion and this second winding section in order; And
One second coil, is set around this first winding section, this cross-line portion and this second winding section in order;
Wherein, the number of turns that this first coil and this second coil are set around this cross-line portion is less than 1.
2. common-mode filter as claimed in claim 1, is characterized in that, this first coil and this second coil are located at this iron core axis surface around simultaneously, and this first coil equates with the number of turns essence of this second coil.
3. common-mode filter as claimed in claim 1, it is characterized in that, this first coil is set around this iron core axis surface to form a coiling stratification, and at least one part of this second coil is set around in this coiling stratification, and this first coil equates with the number of turns essence of this second coil.
4. common-mode filter as claimed in claim 1, is characterized in that, the material of this iron core axis is ferrous oxide, and the material of this ferrous oxide is nickel zinc, MnZn or aluminium oxide ceramics.
5. common-mode filter as claimed in claim 1, is characterized in that, this first protuberance, the 3rd protuberance, this second protuberance and the 4th protuberance are provided with a metallization terminal, and wherein, the material of this metallization terminal is made up of silver, nickel, gold or silver, nickel, tin.
6. common-mode filter as claimed in claim 5, it is characterized in that, two line ends of this first coil respectively with this first protuberance on this metallization terminal and this metallization terminal on the 3rd protuberance couple, two line ends of this second coil respectively with this second protuberance on this metallization terminal and this metallization terminal on the 4th protuberance couple.
7. a common-mode filter iron core, is characterized in that, comprises:
One first body of wall, is provided with one first protuberance and one the 3rd protuberance;
One second body of wall, is provided with one second protuberance and one the 4th protuberance;
One iron core axis, couples this first body of wall and this second body of wall, and this iron core axis is further provided with a U-shaped protuberance;
Wherein, this iron core axial area is divided into one first winding section, a cross-line portion and one second winding section by this U-shaped protuberance.
8. common-mode filter iron core as claimed in claim 7, is characterized in that, the material of this common-mode filter iron core is ferrous oxide.
9. common-mode filter iron core as claimed in claim 8, is characterized in that, the material of this ferrous oxide is nickel zinc, MnZn or aluminium oxide ceramics.
10. common-mode filter iron core as claimed in claim 7, it is characterized in that, this first protuberance, the 3rd protuberance, this second protuberance and the 4th protuberance are provided with a metallization terminal, and wherein, the material of this metallization terminal is made up of silver, nickel, gold or silver, nickel, tin.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410580118.6A CN105590719A (en) | 2014-10-24 | 2014-10-24 | Common-mode filter and iron core thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410580118.6A CN105590719A (en) | 2014-10-24 | 2014-10-24 | Common-mode filter and iron core thereof |
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| CN105590719A true CN105590719A (en) | 2016-05-18 |
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| CN201410580118.6A Pending CN105590719A (en) | 2014-10-24 | 2014-10-24 | Common-mode filter and iron core thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108346501A (en) * | 2017-01-23 | 2018-07-31 | Tdk株式会社 | Common-mode filter and its manufacturing method |
| CN110098815A (en) * | 2018-01-29 | 2019-08-06 | 乾坤科技股份有限公司 | The common-mode filter of inductive sensor and distribution capacity can be balanced |
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| CN202034160U (en) * | 2011-02-23 | 2011-11-09 | 西北台庆科技股份有限公司 | Common mode filter |
| JP2013219088A (en) * | 2012-04-04 | 2013-10-24 | Koa Corp | Winding type coil |
| CN103887040A (en) * | 2012-12-19 | 2014-06-25 | Tdk株式会社 | Common mode filter |
| CN204130297U (en) * | 2014-10-24 | 2015-01-28 | 千如电机工业股份有限公司 | Common-mode filter and iron core thereof |
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| CN1536591A (en) * | 2003-04-03 | 2004-10-13 | Tdk株式会社 | Common mode wave filter |
| CN101499363A (en) * | 2007-10-31 | 2009-08-05 | Tdk股份有限公司 | Common mode filter, and manufacturing method of common mode filter |
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