JP2022012061A - Winding device and common mode choke coil - Google Patents

Abstract

To provide a winding device and a common mode choke coil that have improved characteristics.SOLUTION: A winding device comprises a magnetic core 11, first winding 121, second winding 122, a first terminal 131, a second terminal 132, a third terminal, and a fourth terminal. The magnetic core 11 has a winding core part 111. The first winding 121 is wound around the winding core part 111. The second winding 122 is wound on the first winding 121 in the winding core part 111. The first terminal 131 has a first connection part 1313 connected with a first end 1215 of the first winding 121. The second terminal 132 has a second connection part 1323 connected with a second end 1216 of the first winding 121. The third terminal has a third connection part connected with a first end of the second winding 122. The fourth terminal has a fourth connection part connected with a second end of the second winding 122. The first winding 121 and the second winding 122 cross each other at least once in each turn to the winding core part 111.SELECTED DRAWING: Figure 4

Description

The present disclosure generally relates to winding devices and common mode choke coils. More specifically, the present disclosure relates to winding devices and common mode choke coils with magnetic cores and windings.

Patent Document 1 discloses a common mode filter including a drum core, a plate-shaped core attached to the drum core, and first and second wires wound around the drum core.

In the common mode filter described in Patent Document 1, the first and second wires are wound with the first space-corresponding portion wound with a space between adjacent turns and the adjacent turns in close contact with each other. It has the first and second tightly wound portions, and the like.

Japanese Unexamined Patent Publication No. 2014-75533

The common mode filter (common mode choke coil) described in Patent Document 1 can suppress the mode conversion characteristic, but requires a space for dividing the winding region of the first and second wires. , There was a possibility that the inductance would deteriorate.

An object of the present disclosure is to provide a winding device and a common mode choke coil capable of improving the characteristics.

The winding device according to one aspect of the present disclosure includes a magnetic core, a first winding, a second winding, a first terminal, a second terminal, a third terminal, and a fourth terminal. .. The magnetic core has a winding core portion. The first winding is wound around the core portion. The second winding is wound on the first winding at the winding core portion. The first terminal has a first connection portion to which the first end of the first winding is connected. The second terminal has a second connecting portion to which the second end of the first winding is connected. The third terminal has a third connection portion to which the first end of the second winding is connected. The fourth terminal has a fourth connection to which the second end of the second winding is connected. The first winding and the second winding intersect at least once in each turn with respect to the core portion.

The common mode choke coil according to one aspect of the present disclosure includes the winding device.

According to the present disclosure, it is possible to improve the characteristics.

FIG. 1A is a front view showing a state in which the winding device according to the first embodiment is mounted on a mounting board. FIG. 1B is a side view showing a state in which the winding device of the same is mounted on a mounting board. FIG. 1C is a bottom view of the winding device of the same as above. FIG. 2 is a schematic view showing how to wind the first winding and the second winding when the magnetic core of the winding device of the same is viewed from the first direction. FIG. 3 is a schematic view showing how to wind the first winding and the second winding when the magnetic core of the winding device of the same is viewed from the second direction. FIG. 4 is a schematic view showing how to wind the first winding and the second winding when the magnetic core of the winding device of the same is viewed from the third direction. FIG. 5 is a schematic view showing how to wind the first winding and the second winding when the magnetic core of the winding device of the same is viewed from the fourth direction. FIG. 6 is a schematic view showing a part of the locus of the first winding when the magnetic core of the winding device of the same is viewed from the fifth direction. FIG. 7 is a schematic view showing a part of the locus of the second winding when the magnetic core of the winding device of the same is viewed from the fifth direction. FIG. 8A is a front view showing a main part of the winding device according to the comparative example. FIG. 8B is a front view showing a main part of the winding device according to the first embodiment. 9A to 9C are schematic views showing the shape of the winding core portion of the winding device according to the first modification of the first embodiment. FIG. 10A is a front view showing a state in which the winding device according to the second embodiment is mounted on a mounting board. FIG. 10B is a side view showing a state in which the winding device of the same is mounted on a mounting board. FIG. 10C is a bottom view of the winding device of the same as above. FIG. 11A is a perspective view showing the first winding and the second winding of the winding device according to the comparative example. FIG. 11B is a perspective view showing the first winding and the second winding of the winding device according to the second embodiment. FIG. 12A is a front view showing a state in which the winding device according to the third embodiment is mounted on a mounting board. FIG. 12B is a side view showing a state in which the winding device of the same is mounted on a mounting board. FIG. 12C is a bottom view of the winding device of the same as above.

(Embodiment 1)
Hereinafter, the winding device 1 and the common mode choke coil 10 according to the first embodiment will be described with reference to FIGS. 1A to 9C.

In the following, each direction of "up", "down", "left", "right", "front", and "rear" is defined in the directions shown in FIGS. 1A to 9C. That is, in the winding device 1 according to the first embodiment, the direction in which the pair of flange portions 112 and 113 are arranged is the left-right direction, and the direction in which each of the pair of flange portions 112 and 113 and the magnetic plate 14 are arranged is the vertical direction. Yes, the direction orthogonal to both the left-right direction and the up-down direction is the front-back direction. However, these directions are not intended to define the installation direction of the winding device 1. In addition, the arrows indicating each direction in the drawing are shown only for the sake of explanation, and are not accompanied by an entity.

Further, FIGS. 1A to 9C referred to in the first embodiment are schematic views, and the ratio of the size and the thickness of each component in the figure does not necessarily reflect the actual dimensional ratio. Not necessarily.

(1) Structure of Winding Device First, the structure of the winding device 1 according to the first embodiment will be described with reference to FIGS. 1A to 1C.

The winding device 1 according to the first embodiment is, for example, a common mode choke coil 10. That is, the common mode choke coil 10 according to the first embodiment includes the winding device 1 according to the first embodiment. As shown in FIGS. 1A to 1C, the winding device 1 according to the first embodiment includes a magnetic core 11, a pair of windings 12, a plurality of (four in the illustrated example) terminals 13, and a magnetic plate 14. , Equipped with.

(1.1) Magnetic Core The magnetic core 11 has a winding core portion 111 and a pair of flange portions 112 and 113. The pair of flange portions 112 and 113 are provided at both ends of the winding core portion 111 in the left-right direction. The winding core portion 111 has, for example, a rectangular parallelepiped shape that is long in the left-right direction. That is, as shown in FIGS. 6 and 7, the winding core portion 111 has a rectangular tubular shape having a first surface 1111, a second surface 1112, a third surface 1113, and a fourth surface 1114. .. The material of the magnetic core 11 is, for example, a magnetic material such as Mn—Zn-based ferrite or Ni—Zn-based ferrite. Each of the pair of flange portions 112 and 113 has a rectangular shape when viewed from the left-right direction. Further, the outer shape of each of the pair of flange portions 112 and 113 is a rectangular parallelepiped shape.

(1.2) Winding The pair of windings 12 includes a first winding 121 and a second winding 122. In the winding device 1 according to the first embodiment, the first winding 121 is directly wound around the winding core portion 111, and the second winding 122 is mainly wound around the winding core portion 111. It is wound on the wire 121. The first winding 121 may be indirectly wound around the core portion 111, for example, via a film or the like. Each of the first winding 121 and the second winding 122 is, for example, an insulating coated conductor made of an insulating coated copper.

The first winding 121 has a first portion 1211, a second portion 1212, a third portion 1213, and a fourth portion 1214. The first portion 1211 is a portion arranged along the first surface 1111 of the winding core portion 111. The second portion 1212 is a portion arranged along the second surface 1112 of the winding core portion 111. The third portion 1213 is a portion arranged along the third surface 1113 of the winding core portion 111. The fourth portion 1214 is a portion arranged along the fourth surface 1114 of the winding core portion 111. Further, the first winding 121 further has a first end 1215 and a second end 1216. The first end 1215 is a portion of the first winding 121 at the end of winding to the core portion 111. The second end 1216 is a portion of the first winding 121 where the winding starts to be wound around the core portion 111.

The second winding 122 has a first portion 1221, a second portion 1222, a third portion 1223, and a fourth portion 1224. The first portion 1221 is a portion arranged along the first surface 1111 of the winding core portion 111. The second portion 1222 is a portion arranged along the second surface 1112 of the winding core portion 111. The third portion 1223 is a portion arranged along the third surface 1113 of the winding core portion 111. The fourth portion 1224 is a portion arranged along the fourth surface 1114 of the winding core portion 111. Further, the second winding 122 further has a first end 1225 and a second end 1226. The first end 1225 is a portion of the second winding 122 where winding to the core portion 111 begins. The second end 1226 is a portion of the second winding 122 at the end of winding to the core portion 111.

In the winding device 1 according to the first embodiment, the number of turns N1 of the first winding 121 with respect to the winding core portion 111 and the number of windings N2 of the second winding 122 with respect to the winding core portion 111 are equal.

The winding method of the first winding 121 and the second winding 122 with respect to the winding core portion 111 will be described in the column of "(2) Winding method of winding".

(1.3) Terminals The plurality of terminals 13 include a first terminal 131, a second terminal 132, a third terminal 133, and a fourth terminal 134.

The first terminal 131 has a first main portion 1311, a first extending portion 1312, and a first connecting portion 1313. The first main portion 1311 is a rectangular plate whose shape is long in the vertical direction when viewed from the left-right direction. The first extending portion 1312 projects to the right from the lower end edge of the first main portion 1311. The first connecting portion 1313 projects to the right from the rear end edge at the upper end portion of the first main portion 1311. As shown in FIG. 1C, the first end 1215 of the first winding 121 is connected to the first connecting portion 1313. The first end 1215 of the first winding 121 is connected to the first connecting portion 1313 by welding, for example.

The second terminal 132 has a second main portion 1321, a second extending portion 1322, and a second connecting portion 1323. The second main portion 1321 is a rectangular plate whose shape is long in the vertical direction when viewed from the left-right direction. The second extending portion 1322 projects to the left from the lower end edge of the second main portion 1321. The second connecting portion 1323 projects to the left from the trailing edge of the upper end of the second main portion 1321. As shown in FIG. 1C, the second end 1216 of the first winding 121 is connected to the second connecting portion 1323. The second end 1216 of the first winding 121 is connected to the second connecting portion 1323 by welding, for example.

The third terminal 133 has a third main unit 1331, a third extension unit 1332, and a third connection unit 1333. The third main portion 1331 is a rectangular plate whose shape is long in the vertical direction when viewed from the left-right direction. The third extending portion 1332 projects to the right from the lower end edge of the third main portion 1331. The third connection portion 1333 projects to the right from the front end edge at the upper end portion of the third main portion 1331. As shown in FIG. 1C, the first end 1225 of the second winding 122 is connected to the third connection portion 1333. The first end 1225 of the second winding 122 is connected to the third connecting portion 1333 by welding, for example.

The fourth terminal 134 has a fourth main portion 1341, a fourth extension portion 1342, and a fourth connection portion 1343. The fourth main portion 1341 is a rectangular plate whose shape is long in the vertical direction when viewed from the left-right direction. The fourth extending portion 1342 projects to the left from the lower end edge of the fourth main portion 1341. The fourth connecting portion 1343 projects to the left from the front edge at the upper end of the fourth main portion 1341. As shown in FIG. 1C, the second end 1226 of the second winding 122 is connected to the fourth connecting portion 1343. The second end 1226 of the second winding 122 is connected to the fourth connecting portion 1343 by welding, for example.

The material of each of the first terminal 131, the second terminal 132, the third terminal 133, and the fourth terminal 134 is, for example, copper. A plating layer (not shown) is formed on the surfaces of each of the first terminal 131, the second terminal 132, the third terminal 133, and the fourth terminal 134.

The first terminal 131 is attached, for example, by an adhesive 15 at the rear end of the flange 112 on one side (left side of FIG. 1A). The second terminal 132 is attached at the rear end of the flange 113 on the other side (right side of FIG. 1A), for example, by an adhesive 15. At the front end of the third terminal 133, one of the flanges 112 (on the left side of FIG. 1A), it is attached, for example, by an adhesive 15. The fourth terminal 134 is attached, for example, by an adhesive 15 at the front end of the flange 113 on the other side (right side of FIG. 1A).

(1.4) Magnetic plate The magnetic plate 14 has a rectangular plate shape that is long in the left-right direction. The magnetic plate 14 is joined to the pair of flange portions 112, 113 so as to straddle the pair of flange portions 112, 113. Specifically, the magnetic plate 14 is joined to the upper surfaces of the pair of flange portions 112 and 113 at both ends in the left-right direction. The material of the magnetic plate 14 is, for example, a magnetic material such as Mn—Zn-based ferrite or Ni—Zn-based ferrite.

(1.5) Size of winding device The winding device 1 (common mode choke coil 10) has, for example, a length dimension (dimension in the left-right direction) of about 3.2 mm and a width dimension (dimension in the front-rear direction) thereof. The dimension) is about 2.5 mm, and the height dimension (dimension in the vertical direction) is about 2.2 mm. The thickness dimension (vertical dimension) of the magnetic plate 14 is, for example, about 0.6 mm. Further, as each of the first winding 121 and the second winding 122, for example, an insulating coated conductor having a diameter of about 0.05 mm is used.

Further, each of the pair of flange portions 112 and 113 has, for example, a width dimension (dimension in the front-rear direction) of about 2.5 mm and a height dimension (dimension in the vertical direction) of about 1.6 mm. Its thickness dimension (dimension in the left-right direction) is about 0.7 mm. Further, the winding core portion 111 has, for example, a width dimension (dimension in the front-rear direction) of about 1.0 mm, a height dimension (dimension in the vertical direction) of about 1.0 mm, and a length dimension (dimension) thereof. The dimension in the left-right direction) is about 1.6 mm.

(2) Winding Method of Winding Next, the winding method of the first winding 121 and the second winding 122 with respect to the winding core portion 111 of the magnetic core 11 will be described with reference to FIGS. 2 to 7. The circled numbers in FIGS. 2 to 5 indicate the number of turns of the first winding 121 and the second winding 122, respectively. Further, in FIGS. 2 to 5, the magnetic plate 14 is not shown.

FIG. 2 is a schematic view showing how to wind the first winding 121 and the second winding 122 when the magnetic core 11 of the winding device 1 according to the first embodiment is viewed from the first direction (front). FIG. 2 shows how to wind the first winding 121 and the second winding 122 with respect to the second surface 1112 of the winding core portion 111.

Specifically, in the second surface 1112 of the winding core portion 111, when n is a natural number of 1 or more, the n + 1th turn 4th portion 1214 of the first winding 121 and the n turns of the second winding 122. The second part 1222 of the eye intersects (crosses). That is, on the second surface 1112 of the winding core portion 111, the first winding 121 and the second winding 122 intersect (cross).

FIG. 3 is a schematic view showing how to wind the first winding 121 and the second winding 122 when the magnetic core 11 of the winding device 1 according to the first embodiment is viewed from the second direction (upper side). FIG. 3 shows how to wind the first winding 121 and the second winding 122 with respect to the third surface 1113 of the winding core portion 111.

Specifically, in the third surface 1113 of the winding core portion 111, when n is a natural number of 1 or more, the third portion 1223 of the nth turn of the second winding 122 is n of the first winding 121. It is arranged between the first portion 1211 of the turn and the first portion 1211 of the n + 1 turn of the first winding 121.

FIG. 4 is a schematic view showing how to wind the first winding 121 and the second winding 122 when the magnetic core 11 of the winding device 1 according to the first embodiment is viewed from the third direction (rear). FIG. 4 shows how the first winding 121 and the second winding 122 are wound around the fourth surface 1114 of the winding core portion 111. Further, in FIG. 4, the winding positions of the first winding 121 and the second winding 122 are turned upside down in order to correspond to FIGS. 2, 3 and 5.

Specifically, in the fourth surface 1114 of the winding core portion 111, when n is a natural number of 1 or more, the second portion 1212 of the nth turn of the first winding 121 and the n turns of the second winding 122. The fourth part of the eye, 1224, intersects (crosses). That is, on the fourth surface 1114 of the winding core portion 111, the first winding 121 and the second winding 122 intersect (cross).

FIG. 5 is a schematic view showing how to wind the first winding 121 and the second winding 122 when the magnetic core 11 of the winding device 1 according to the first embodiment is viewed from the fourth direction (downward). FIG. 5 shows how to wind the first winding 121 and the second winding 122 with respect to the first surface 1111 of the winding core portion 111.

Specifically, in the first surface 1111 of the winding core portion 111, when n is a natural number of 1 or more, the first portion 1221 on the nth turn of the second winding 122 is n of the first winding 121. It is arranged between the third part 1213 of the turn and the third part 1213 of the n + 1 turn of the first winding 121.

In the winding device 1 according to the first embodiment, as described above, the first winding 121 and the second winding 122 intersect with each other on the second surface 1112 and the fourth surface 1114 of the winding core portion 111 (as described above). Cross). That is, in the winding device 1 according to the first embodiment, the first winding 121 and the second winding 122 intersect at least once in each turn with respect to the winding core portion 111.

FIG. 6 is a schematic view showing a part of the locus of the first winding 121 when one flange 113 of the winding device 1 according to the first embodiment is viewed from the fifth direction (left side). The alternate long and short dash line in FIG. 6 shows the locus of the first winding 121. The first winding 121 is drawn out from the first connection portion 1313 of the first terminal 131 and wound around the square winding core portion 111.

The first winding 121 drawn from the first connection portion 1313 of the first terminal 131 is wound around the winding core portion 111 along the first surface 1111, the second surface 1112, the third surface 1113, and the fourth surface 1114. Then, it is counted as one turn at the corner of the first surface 1111 and the fourth surface 1114. After that, similarly, it is wound along the first surface 1111, the second surface 1112, the third surface 1113, and the fourth surface 1114, and one turn is added for each round.

FIG. 7 is a schematic view showing a part of the locus of the second winding 122 when one flange 112 of the winding device 1 according to the first embodiment is viewed from the fifth direction (left side). The alternate long and short dash line in FIG. 7 shows the locus of the second winding 122. The second winding 122 is drawn out from the third connection portion 1333 of the third terminal 133 and wound around the square winding core portion 111.

As shown in FIGS. 6 and 7, the first winding 121 and the second winding 122 start to be wound from a diagonal position (position shifted by 1/2 turn) with respect to the core portion 111. That is, in the winding device 1 according to the first embodiment, the winding start position of the first winding 121 and the winding start position of the second winding 122 are deviated by 1/2 turn.

(3) Arrangement of connection portions Next, the first connection portion 1313 of the first terminal 131, the second connection portion 1323 of the second terminal 132, the third connection portion 1333 of the third terminal 133, and the fourth of the fourth terminal 134 The arrangement of the connecting portion 1343 will be described with reference to FIGS. 1A to 1C.

In a state where the winding device 1 according to the first embodiment is mounted on the mounting surface 21 of the mounting board 2, as shown in FIGS. 1A and 1B, the first connecting portion 1313, the second connecting portion 1323, and the third connecting portion 1333 are mounted. Each of the fourth connecting portion 1343 and the fourth connecting portion 1343 is arranged on the opposite side of the mounting board 2 in the direction (vertical direction) intersecting with the mounting surface 21 of the mounting board 2. In other words, each of the first connection portion 1313, the second connection portion 1323, the third connection portion 1333, and the fourth connection portion 1343 becomes a magnetic plate 14 rather than the mounting substrate 2 between the mounting substrate 2 and the magnetic plate 14. It is located close to each other.

As a result, the solder 3 used when the winding device 1 is mounted on the mounting board 2, the scattered flux, and the like are collected from the first connection portion 1313, the second connection portion 1323, the third connection portion 1333, and the fourth connection portion. It is possible to suppress the adhesion to 1343.

(4) Adhesive Structure of Terminals Next, the adhesive structure of the plurality of terminals 13 to the pair of flange portions 112 and 113 will be described with reference to FIGS. 8A and 8B. Here, the third terminal 133 among the plurality of terminals 13 will be described as an example, but the same applies to the first terminal 131, the second terminal 132, and the fourth terminal 134.

FIG. 8A is a front view showing a main part of the winding device 1 according to the comparative example. In the winding device 1 according to the comparative example, as shown in FIG. 8A, the adhesive 15 is applied to the entire third main portion 1331 and the third extending portion 1332 of the third terminal 133, and the third terminal 133 is coated with the adhesive 15. The entire surface of the main portion 1331 and the third extension portion 1332 is fixed to the flange portion 112.

For example, when bending, twisting, heat shrinkage, or the like occurs in the mounting board 2 on which the winding device 1 according to the comparative example is mounted, stress is applied to the third terminal 133 fixed to the mounting surface 21 of the mounting board 2. Occurs. In the winding device 1 according to the comparative example, since the third terminal 133 is fixed to the flange portion 112 on the entire surface of the third main portion 1331 and the third extension portion 1332, the stress generated in the third terminal 133 is generated. The stress is transmitted to the magnetic core 11 and the stress is concentrated on the boundary portion between the winding core portion 111 and the flange portion 112. As a result, the desired characteristics may not be obtained, and the reliability of the winding device 1 may decrease.

On the other hand, in the winding device 1 according to the first embodiment, as shown in FIG. 8B, the third terminal 133 is fixed to the flange portion 112 by the adhesive 15 applied only to the upper portion of the third main portion 1331. Has been done. That is, the third terminal 133 is fixed to the magnetic core 11 only at the portion opposite to the mounting board 2 in the direction intersecting the mounting surface 21 of the mounting board 2 on which the winding device 1 is mounted.

In the winding device 1 according to the first embodiment, the lower portion of the third main portion 1331 and the third extending portion 1332 are in a free state with respect to the flange portion 112. Therefore, even if stress is generated in the winding device 1 due to bending, twisting, heat shrinkage, etc. of the mounting substrate 2, the lower portion of the third main portion 1331 and the third extending portion 1332 (that is, the adhesive 15 is applied). By deforming the non-existing portion), it becomes possible to relieve the stress. As a result, the stress transmitted to the magnetic core 11 is also reduced, and it is possible to obtain desired characteristics, so that it is possible to suppress a decrease in reliability of the winding device 1.

(5) Summary In the winding device 1 according to the first embodiment, as described above, the winding start position of the first winding 121 and the winding start position of the second winding 122 are deviated by 1/2 turn. There is. On the third surface 1113 of the winding core portion 111, the third portion 1223 of the nth turn of the second winding 122 is the n + 1 turn of the first portion 1211 of the nth turn of the first winding 121 and the first winding 121. The second winding 122 is wound and wound between the first portion 1211 of the eye and the second surface 1112 and the fourth surface 1114 of the winding core portion 111 so as to intersect (cross) the first winding 121. On the first surface 1111 of the core portion 111, the first portion 1221 of the nth turn of the second winding 122 is the third portion 1213 of the nth turn of the first winding 121 and the n + 1th turn of the first winding 121. By winding between the third part 1213 and the first winding 121, the impedance deviation of the second winding 122 with respect to the first winding 121 for 1/2 turn becomes substantially zero in each turn, and the first winding in each turn The first winding 121 and the second winding 122 are almost in equilibrium. This makes it possible to suppress the mode conversion characteristic of the winding device 1. The "mode conversion characteristic" referred to in the present disclosure means that the differential mode component replaces the common mode component, and the lower the mode conversion characteristic, the more the generation of common mode noise is suppressed.

(6) Modification Example 1 is only one of various embodiments of the present disclosure. The first embodiment can be changed in various ways depending on the design and the like as long as the object of the present disclosure can be achieved. Hereinafter, modified examples of the first embodiment are listed. The modifications described below can be applied in combination as appropriate.

(6.1) Modification 1
The winding device 1 according to the first modification of the first embodiment will be described with reference to FIGS. 9A to 9C. Regarding the winding device 1 according to the modification 1, the same components as those of the winding device 1 according to the first embodiment are designated by the same reference numerals, and the description thereof will be omitted.

In the winding device 1 according to the first embodiment, as described above, the shape of the winding core portion 111 of the magnetic core 11 is a square cylinder, and the angle of each corner portion of the winding core portion 111 is about 90 degrees. When winding the conductor constituting the winding 12 around the winding core portion 111, the conductor is wound while applying tension to the winding core portion 111, so that stress is concentrated on the conducting wire at the corner portion of the winding core portion 111. As a result, if the conductor is thin, it may break.

Therefore, in order to suppress the disconnection of the conducting wire constituting the winding 12, the shape of the winding core portion 111 is preferably cylindrical, for example, as shown in FIG. 9A. Further, the shape of the winding core portion 111 is not limited to a columnar shape, and may be, for example, an elliptical columnar shape as shown in FIG. 9B. In these cases, since the stress is not concentrated on the conducting wire constituting the winding 12, it is possible to suppress the disconnection even when the conducting wire is thin.

Further, if the angle of each corner of the core 111 is larger than 90 degrees, it is possible to reduce the concentration of stress at the corners of the core 111. Therefore, the shape of the core 111 is, for example, , As shown in FIG. 9C, it may be a hexagonal columnar shape. Further, the shape of the winding core portion 111 is not limited to a hexagon, and may be a polygonal columnar shape having five or more sides such as a pentagon.

(6.2) Other Modifications The other modifications of the first embodiment are listed below.

If the arrangement of the first winding 121 and the second winding 122 is substantially the same, the winding directions of the first winding 121 and the second winding 122 may be opposite to each other.

Further, in FIG. 2, the final turn of the second winding 122 is directly wound around the core portion 111, but the present invention is not limited to this. The final turn of the second winding 122 may be wound, for example, between the final turn of the first winding 121 and the flange portion 113, or one of the final turns of the flange portion 113 and the second winding 122. It may be wound between the winding and the winding before the turn.

As described above, if the arrangement of the other turns of the first winding 121 and the second winding 122 excluding the final turn of the second winding 122 is substantially the same as the positions shown in FIGS. Since the impedance equilibrium state of the first winding 121 and the second winding 122 does not change so as to affect the characteristics, the final turn of the second winding 122 does not have to be the above-mentioned winding position.

The number of turns N1 of the first winding 121 and the number of turns N2 of the second winding 122 may be different.

(Embodiment 2)
The winding device 1A according to the second embodiment will be described with reference to FIGS. 10A to 11B. Regarding the winding device 1A according to the second embodiment, the same components as those of the winding device 1 according to the first embodiment are designated by the same reference numerals and the description thereof will be omitted.

In the winding device 1A according to the second embodiment, the first connection portion 1313 of the first terminal 131A to which the first end 1215 of the first winding 121 is connected and the second end 1226 of the second winding 122 are connected. It differs from the winding device 1 according to the first embodiment in that the fourth connection portion 1343 of the fourth terminal 134A is arranged on the lower side.

In the following, in the directions shown in FIGS. 10A to 11B, each direction of "up", "down", "left", "right", "front", and "rear" is defined. That is, in the winding device 1A according to the second embodiment, the direction in which the pair of flange portions 112 and 113 are arranged is the left-right direction, and the direction in which each of the pair of flange portions 112 and 113 and the magnetic plate 14 are arranged is the vertical direction. Yes, the direction orthogonal to both the left-right direction and the up-down direction is the front-back direction. However, these directions are not intended to define the installation direction of the winding device 1A. In addition, the arrows indicating each direction in the drawing are shown only for the sake of explanation, and are not accompanied by an entity.

Further, FIGS. 10A to 11B referred to in the second embodiment are schematic views, and the ratio of the size and the thickness of each component in the figure does not necessarily reflect the actual dimensional ratio. Not necessarily.

As shown in FIGS. 10A to 10C, the winding device 1A according to the second embodiment includes a magnetic core 11, a pair of windings 12, a plurality of terminals 13A (four in the illustrated example), and a magnetic plate 14. , Equipped with. The pair of windings 12 includes a first winding 121 and a second winding 122. The plurality of terminals 13A include a first terminal 131A, a second terminal 132A, a third terminal 133A, and a fourth terminal 134A.

The first terminal 131A has a first main portion 1311, a first extending portion 1312, and a first connecting portion 1313. The first main portion 1311 is a rectangular plate whose shape is long in the vertical direction when viewed from the left-right direction. The first extending portion 1312 projects to the right from the lower end edge of the first main portion 1311. The first connection portion 1313 projects to the right from the rear end edge at the lower end portion of the first main portion 1311. That is, the first connection portion 1313 is arranged at one end (lower end) in the direction (vertical direction) intersecting the mounting surface 21 of the mounting board 2 on which the winding device 1A is mounted. As shown in FIG. 10C, the first end 1215 of the first winding 121 is connected to the first connecting portion 1313. The first end 1215 of the first winding 121 is connected to the first connecting portion 1313 by welding, for example. The first end 1215 of the first winding 121 is a winding end portion of the first winding 121 with respect to the winding core portion 111.

The second terminal 132A has a second main portion 1321, a second extending portion 1322, and a second connecting portion 1323. The second main portion 1321 is a rectangular plate whose shape is long in the vertical direction when viewed from the left-right direction. The second extending portion 1322 projects to the left from the lower end edge of the second main portion 1321. The second connecting portion 1323 projects to the left from the trailing edge of the upper end of the second main portion 1321. That is, the second connection portion 1323 is arranged at the other end (upper end portion) in the direction (vertical direction) intersecting the mounting surface 21 of the mounting board 2 on which the winding device 1A is mounted. As shown in FIG. 10C, the second end 1216 of the first winding 121 is connected to the second connecting portion 1323. The second end 1216 of the first winding 121 is connected to the second connecting portion 1323 by welding, for example. The second end 1216 of the first winding 121 is a winding start portion of the first winding 121 with respect to the winding core portion 111.

The third terminal 133A has a third main unit 1331, a third extension unit 1332, and a third connection unit 1333. The third main portion 1331 is a rectangular plate whose shape is long in the vertical direction when viewed from the left-right direction. The third extending portion 1332 projects to the right from the lower end edge of the third main portion 1331. The third connection portion 1333 projects to the right from the front end edge at the upper end portion of the third main portion 1331. That is, the third connection portion 1333 is arranged at one end (upper end) in the direction (vertical direction) intersecting the mounting surface 21 of the mounting board 2 on which the winding device 1A is mounted. As shown in FIG. 10C, the first end 1225 of the second winding 122 is connected to the third connection portion 1333. The first end 1225 of the second winding 122 is connected to the third connecting portion 1333 by welding, for example. The first end 1225 of the second winding 122 is a winding start portion of the second winding 122 with respect to the winding core portion 111.

The fourth terminal 134A has a fourth main portion 1341, a fourth extension portion 1342, and a fourth connection portion 1343. The fourth main portion 1341 is a rectangular plate whose shape is long in the vertical direction when viewed from the left-right direction. The fourth extending portion 1342 projects to the left from the lower end edge of the fourth main portion 1341. The fourth connecting portion 1343 projects to the left from the front edge at the lower end of the fourth main portion 1341. That is, the fourth connection portion 1343 is arranged at the other end (lower end) in the direction intersecting the mounting surface 21 of the mounting board 2 on which the winding device 1A is mounted. As shown in FIG. 10C, the second end 1226 of the second winding 122 is connected to the fourth connecting portion 1343. The second end 1226 of the second winding 122 is connected to the fourth connecting portion 1343 by welding, for example. The second end 1226 of the second winding 122 is the winding end portion of the first winding 121 with respect to the winding core portion 111.

FIG. 11A is a perspective view of the first winding 121 and the second winding 122 of the winding device 1 according to the comparative example. In the winding device 1 according to the comparative example, the first connection portion 1313 of the first terminal 131 to which the first end 1215 of the first winding 121 is connected is provided at the upper end portion of the first main portion 1311. The length of the first end 1215 of one winding 121 is long. Further, in the winding device 1 according to the comparative example, the fourth connection portion 1343 of the fourth terminal 134 to which the second end 1226 of the second winding 122 is connected is provided at the upper end portion of the fourth main portion 1341. , The length of the second end 1226 of the second winding 122 is long.

In the winding device 1 according to the comparative example, as described above, the length of the first end 1215 of the first winding 121 and the length of the second end 1226 of the second winding 122 are long, and the length is long. Since the magnetic core 11 is in a floating state from the winding core portion 111, the mode conversion characteristic of the winding device 1 may deteriorate (deteriorate).

On the other hand, in the winding device 1A according to the second embodiment, as described above, the first connection portion 1313 of the first terminal 131A to which the first end 1215 of the first winding 121 is connected is the first main unit. It is provided at the lower end of 1311, and the length of the first end 1215 of the first winding 121 is shortened (see FIG. 11B). Further, in the winding device 1A according to the second embodiment, the fourth connection portion 1343 of the fourth terminal 134A to which the second end 1226 of the second winding 122 is connected is provided at the lower end portion of the fourth main portion 1341. The length of the second end 1226 of the second winding 122 is shortened (see FIG. 11B).

In the winding device 1A according to the second embodiment, as described above, the length of the second end 1216 of the first winding 121 and the length of the second end 1226 of the second winding 122 are shortened. Compared with the winding device 1 according to the comparative example, it is possible to suppress the mode conversion characteristic. That is, according to the winding device 1A according to the second embodiment, it is possible to improve the characteristics of the winding device 1A.

The modification described in the first embodiment may be applied to the winding device 1A according to the second embodiment.

(Embodiment 3)
The winding device 1B according to the third embodiment will be described with reference to FIGS. 12A to 12C. Regarding the winding device 1B according to the third embodiment, the same components as those of the winding device 1 according to the first embodiment are designated by the same reference numerals and the description thereof will be omitted.

In the winding device 1B according to the third embodiment, the directions in which each of the first connection portion 1313, the second connection portion 1323, the third connection portion 1333, and the fourth connection portion 1343 intersects the mounting surface 21 of the mounting board 2. It differs from the winding device 1 according to the first embodiment in that it is arranged on the opposite side to the magnetic plate 14 in the vertical direction).

In the following, in the directions shown in FIGS. 12A to 12C, each direction of "up", "down", "left", "right", "front", and "rear" is defined. That is, in the winding device 1B according to the third embodiment, the direction in which the pair of flange portions 112 and 113 are arranged is the left-right direction, and the direction in which each of the pair of flange portions 112 and 113 and the magnetic plate 14 are arranged is the vertical direction. Yes, the direction orthogonal to both the left-right direction and the up-down direction is the front-back direction. However, these directions are not intended to define the installation direction of the winding device 1B. In addition, the arrows indicating each direction in the drawing are shown only for the sake of explanation, and are not accompanied by an entity.

Further, FIGS. 12A to 12C referred to in the third embodiment are schematic views, and the ratio of the size and the thickness of each component in the figure does not necessarily reflect the actual dimensional ratio. Not necessarily.

As shown in FIGS. 12A to 12C, the winding device 1B according to the third embodiment includes a magnetic core 11, a pair of windings 12, a plurality of terminals 13B (four in the illustrated example), and a magnetic plate 14. , Equipped with. The pair of windings 12 includes a first winding 121 and a second winding 122. The plurality of terminals 13B include a first terminal 131B, a second terminal 132B, a third terminal 133B, and a fourth terminal 134B.

The first terminal 131B has a first main portion 1311, a first extending portion 1312, and a first connecting portion 1313. The first main portion 1311 is a rectangular plate whose shape is long in the vertical direction when viewed from the left-right direction. The first extending portion 1312 projects to the right from the lower end edge of the first main portion 1311. The first connection portion 1313 projects to the right from the rear end edge at the lower end portion of the first main portion 1311. That is, the first connection portion 1313 is arranged on the opposite side of the magnetic plate 14 in the direction intersecting the mounting surface 21 of the mounting board 2 on which the winding device 1B is mounted. In other words, the first connection portion 1313 is arranged between the mounting board 2 and the magnetic plate 14 at a position closer to the mounting board 2 than the magnetic plate 14. As shown in FIG. 12C, the first end 1215 of the first winding 121 is connected to the first connecting portion 1313. The first end 1215 of the first winding 121 is connected to the first connecting portion 1313 by welding, for example. The first end 1215 of the first winding 121 is a winding end portion of the first winding 121 with respect to the winding core portion 111.

The second terminal 132B has a second main portion 1321, a second extending portion 1322, and a second connecting portion 1323. The second main portion 1321 is a rectangular plate whose shape is long in the vertical direction when viewed from the left-right direction. The second extending portion 1322 projects to the left from the lower end edge of the second main portion 1321. The second connecting portion 1323 projects to the left from the trailing edge of the lower end of the second main portion 1321. That is, the second connection portion 1323 is arranged on the opposite side of the magnetic plate 14 in the direction intersecting the mounting surface 21 of the mounting board 2 on which the winding device 1B is mounted. In other words, the second connection portion 1323 is arranged between the mounting substrate 2 and the magnetic plate 14 at a position closer to the mounting substrate 2 than the magnetic plate 14. As shown in FIG. 12C, the second end 1216 of the first winding 121 is connected to the second connecting portion 1323. The second end 1216 of the first winding 121 is connected to the second connecting portion 1323 by welding, for example. The second end 1216 of the first winding 121 is a winding start portion of the first winding 121 with respect to the winding core portion 111.

The third terminal 133B has a third main unit 1331, a third extension unit 1332, and a third connection unit 1333. The third main portion 1331 is a rectangular plate whose shape is long in the vertical direction when viewed from the left-right direction. The third extending portion 1332 projects to the right from the lower end edge of the third main portion 1331. The third connection portion 1333 projects to the right from the front end edge at the lower end of the third main portion 1331. That is, the third connection portion 1333 is arranged on the opposite side of the magnetic plate 14 in the direction intersecting the mounting surface 21 of the mounting board 2 on which the winding device 1B is mounted. In other words, the third connection portion 1333 is arranged between the mounting substrate 2 and the magnetic plate 14 at a position closer to the mounting substrate 2 than the magnetic plate 14. As shown in FIG. 12C, the first end 1225 of the second winding 122 is connected to the third connection portion 1333. The first end 1225 of the second winding 122 is connected to the third connecting portion 1333 by welding, for example. The first end 1225 of the second winding 122 is a winding start portion of the second winding 122 with respect to the winding core portion 111.

The fourth terminal 134B has a fourth main portion 1341, a fourth extension portion 1342, and a fourth connection portion 1343. The fourth main portion 1341 is a rectangular plate whose shape is long in the vertical direction when viewed from the left-right direction. The fourth extending portion 1342 projects to the left from the lower end edge of the fourth main portion 1341. The fourth connecting portion 1343 projects to the left from the front edge at the lower end of the fourth main portion 1341. That is, the fourth connection portion 1343 is arranged on the opposite side of the magnetic plate 14 in the direction intersecting the mounting surface 21 of the mounting board 2 on which the winding device 1B is mounted. In other words, the fourth connection portion 1343 is arranged between the mounting board 2 and the magnetic plate 14 at a position closer to the mounting board 2 than the magnetic plate 14. As shown in FIG. 12C, the second end 1226 of the second winding 122 is connected to the fourth connection portion 1343. The second end 1226 of the second winding 122 is connected to the fourth connecting portion 1343 by welding, for example. The second end 1226 of the second winding 122 is the winding end portion of the first winding 121 with respect to the winding core portion 111.

In a state where the winding device 1B according to the third embodiment is mounted on the mounting surface 21 of the mounting board 2, as shown in FIGS. 12A and 12B, the first connecting portion 1313, the second connecting portion 1323, and the third connecting portion 1333 are mounted. Each of the fourth connection portion 1343 and the fourth connection portion 1343 is arranged on the opposite side (mounting board 2 side) of the magnetic plate 14 in the direction (vertical direction) intersecting the mounting surface 21 of the mounting board 2. As a result, it is possible to reduce the height dimension (vertical dimension) of each of the pair of flange portions 112 and 113, and as a result, the gap G1 between the pair of windings 12 and the magnetic plate 14 is reduced. It becomes possible. Then, the length of the magnetic path M1 formed by the magnetic core 11 and the magnetic plate 14 can be shortened. Here, since the inductance values of the first winding 121 and the second winding 122 are inversely proportional to the length of the magnetic path M1, the length of the magnetic path M1 is shortened so that the first winding 121 and the second winding are the first. It is possible to increase the inductance value of each of the two windings 122. That is, according to the winding device 1B according to the third embodiment, it is possible to improve the characteristics of the winding device 1B.

The modification described in the first embodiment may be applied to the winding device 1B according to the third embodiment.

(summary)
As described above, the winding device (1; 1A; 1B) according to the first aspect includes the magnetic core (11), the first winding (121), the second winding (122), and the first. It includes one terminal (131; 131A; 131B), a second terminal (132; 132A; 132B), a third terminal (133; 133A; 133B), and a fourth terminal (134; 134A; 134B). The magnetic core (11) has a winding core portion (111). The first winding (121) is wound around the core portion (111). The second winding (122) is wound on the first winding (121) at the winding core portion (111). The first terminal (131; 131A; 131B) has a first connection portion (1313) to which the first end (1215) of the first winding (121) is connected. The second terminal (132; 132A; 132B) has a second connection (1323) to which the second end (1216) of the first winding (121) is connected. The third terminal (133; 133A; 133B) has a third connection portion (1333) to which the first end (1225) of the second winding (122) is connected. The fourth terminal (134; 134A; 134B) has a fourth connection (1343) to which the second end (1226) of the second winding (122) is connected. The first winding (121) and the second winding (122) intersect at least once in each turn with respect to the core portion (111).

According to this aspect, it is possible to improve the characteristics of the winding device (1; 1A; 1B).

In the winding device (1; 1A; 1B) according to the second aspect, in the first aspect, the number of turns (N1) of the first winding (121) with respect to the winding core portion (111) and the winding core portion (N1). The number of turns (N2) of the second winding (122) with respect to 111) is equal to.

According to this aspect, it is possible to improve the characteristics of the winding device (1; 1A; 1B).

In the winding device (1) according to the third aspect, in the first or second aspect, the winding core portion (111) has a first surface (1111), a second surface (1112), and a third surface (1113). ) And a rectangular cylinder having a fourth surface (1114). Each of the first winding (121) and the second winding (122) has a first portion (1211,1221), a second portion (1212,1222), a third portion (1213,1223), and a first portion. It has 4 parts (1241, 1224) and. The first portion (1211,1221) is a portion arranged along the first surface (1111) of the winding core portion (111). The second portion (1212,1222) is a portion arranged along the second surface (1112) of the winding core portion (111). The third portion (1213, 1223) is a portion arranged along the third surface (1113) of the winding core portion (111). The fourth portion (124, 1224) is a portion arranged along the fourth surface (1114) of the winding core portion (111). When n is a natural number of 1 or more, the first winding (121) and the second winding (122) are arranged as follows. On the third surface (1113), the third part (1223) of the second winding (122) on the nth turn is the first part (1211) and the first volume of the first winding (121) on the nth turn. It is arranged between the line (121) and the first part (1211) of the n + 1 turn. On the first surface (1111), the first portion (1221) of the second winding (122) on the nth turn is the third portion (1213) and the first volume of the first winding (121) on the nth turn. It is arranged between the line (121) and the third part (1213) of the n + 1 turn. The first winding (121) and the second winding (122) intersect each of the second surface (1112) and the fourth surface (1114).

According to this aspect, it is possible to improve the characteristics of the winding device (1).

In the winding device (1) according to the fourth aspect, in the third aspect, in the second surface (1112), the fourth part (1214) and the second volume of the n + 1 turn of the first winding (121). The second part (1222) of the nth turn of the line (122) intersects. On the fourth surface (1114), the second part (1212) of the nth turn of the first winding (121) and the fourth part (1224) of the nth turn of the second winding (122) intersect with each other. There is.

According to this aspect, it is possible to improve the characteristics of the winding device (1).

In the winding device (1A) according to the fifth aspect, in any one of the first to fourth aspects, the first connecting portion (1313) and the second connecting portion (1323) are the winding device (1323). It is arranged at one end and the other end in the direction intersecting the mounting surface (21) of the mounting board (2) on which 1A) is mounted. The third connection portion (1333) and the fourth connection portion (1343) are arranged at one end and the other end in the direction intersecting the mounting surface (21), respectively.

According to this aspect, it is possible to improve the characteristics of the winding device (1A).

In the winding device (1) according to the sixth aspect, in any one of the first to fourth aspects, the first connection portion (1313), the second connection portion (1323), and the third connection portion (1333) are used. ) And each of the fourth connection portion (1343) intersects the mounting surface (21) of the mounting board (2) on which the winding device (1) is mounted (for example, in the vertical direction). It is located on the opposite side of.

According to this aspect, the solder (3) crawls up to the first connection (1313), the second connection (1323), the third connection (1333) and the fourth connection (1343), and the flux. It is possible to suppress adhesion and the like.

The winding device (1B) according to the seventh aspect further includes a magnetic plate (14) in any one of the first to fourth aspects. The magnetic plate (14) has a mounting board (for example, a vertical direction) with respect to the magnetic core (11) in a direction (for example, in the vertical direction) intersecting the mounting surface (21) of the mounting board (2) on which the winding device (1B) is mounted. It is arranged on the opposite side of 2) and forms a magnetic path (M1) together with the magnetic core (11). Each of the first connection portion (1313), the second connection portion (1323), the third connection portion (1333), and the fourth connection portion (1343) has a magnetic plate (14) in a direction intersecting the mounting surface (21). It is located on the opposite side of.

According to this aspect, it is possible to increase the inductance value of each of the first winding (121) and the second winding (122).

The common mode choke coil (10; 10A; 10B) according to the eighth aspect includes a winding device (1; 1A; 1B) according to any one of the first to seventh aspects.

According to this aspect, it is possible to improve the characteristics of the winding device (1; 1A; 1B).

The configuration according to the second to seventh aspects is not an essential configuration for the winding device (1; 1A; 1B) and can be omitted as appropriate.

1,1A, 1B Winding device 2 Mounting board 10, 10A, 10B Common mode choke coil 11 Magnetic core 21 Mounting surface 111 Winding core 121 First winding 122 Second winding 131, 131A, 131B First terminal 132, 132A, 132B 2nd terminal 133, 133A, 133B 3rd terminal 134, 134A, 134B 4th terminal 1111 1st surface 1112 2nd surface 1113 3rd surface 1114 4th surface 1211, 1221 1st part 1212, 1222 2nd part 1213, 1223 3rd part 1214, 1224 4th part 1215, 1225 1st end 1216, 1226 2nd end 1313 1st connection part 1323 2nd connection part 1333 3rd connection part 1343 4th connection part N1, N2 Number of turns

Claims (8)

A magnetic core with a winding core and
The first winding wound around the core and
The second winding wound on the first winding in the winding core portion and the second winding.
A first terminal having a first connection portion to which the first end of the first winding is connected,
A second terminal having a second connection to which the second end of the first winding is connected,
A third terminal having a third connection to which the first end of the second winding is connected,
A fourth terminal having a fourth connection to which the second end of the second winding is connected is provided.
The first winding and the second winding intersect at least once in each turn with respect to the core portion.
Winding device. The number of turns of the first winding with respect to the core portion and the number of turns of the second winding with respect to the core portion are equal.
The winding device according to claim 1. The winding core portion has a rectangular tubular shape having a first surface, a second surface, a third surface, and a fourth surface.
Each of the first winding and the second winding
A first portion arranged along the first surface of the winding core portion and
A second portion arranged along the second surface of the winding core portion and
A third portion arranged along the third surface of the winding core portion and
It has a fourth portion, which is arranged along the fourth surface of the winding core portion, and has.
When n is a natural number of 1 or more,
On the first surface, the first portion of the nth turn of the second winding is the third portion of the nth turn of the first winding and the third portion of the n + 1th turn of the first winding. Placed between the parts,
On the third surface, the third portion of the nth turn of the second winding is the first portion of the nth turn of the first winding and the first portion of the n + 1th turn of the first winding. Placed between the parts,
On each of the second surface and the fourth surface, the first winding and the second winding intersect each other.
The winding device according to claim 1 or 2. On the second surface, the fourth portion of the n + 1 turn of the first winding intersects with the second portion of the n turn of the second winding.
On the fourth surface, the second portion of the nth turn of the first winding and the fourth portion of the nth turn of the second winding intersect.
The winding device according to claim 3. The first connection portion and the second connection portion are arranged at one end and the other end in a direction intersecting the mounting surface of the mounting board on which the winding device is mounted, respectively.
The third connection portion and the fourth connection portion are arranged at one end and the other end in a direction intersecting with the mounting surface, respectively.
The winding device according to any one of claims 1 to 4. Each of the first connection portion, the second connection portion, the third connection portion, and the fourth connection portion is opposite to the mounting board in a direction intersecting the mounting surface of the mounting board on which the winding device is mounted. Located on the side,
The winding device according to any one of claims 1 to 4. Further provided with a magnetic plate arranged on the opposite side of the mounting board with respect to the magnetic core in a direction intersecting the mounting surface of the mounting board on which the winding device is mounted and forming a magnetic path together with the magnetic core.
Each of the first connection portion, the second connection portion, the third connection portion, and the fourth connection portion is arranged on the opposite side of the magnetic plate in the direction intersecting the mounting surface.
The winding device according to any one of claims 1 to 4. The winding device according to any one of claims 1 to 7.
Common mode choke coil.

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