JPH11273975A - Common mode choke coil - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve magnetic coupling and to miniaturize a choke coil by arranging first and fourth coils, and second and third coils side by side. SOLUTION: A first coil 11 and a second coil 12 where a flat wire is wound edgewise are inserted into one magnetic leg of a core 17 for forming a square- shaped closed magnetic path and a third coil 13 and a fourth coil 14 are inserted into the other magnetic leg that opposes the magnetic core 17. At this time, the first coil 11 and the fourth coil 14, and the second coil 12 and the third coil 13 are arranged side by side. Also, the wires of one terminal for connecting the first coil 11 and the third coil 13, and the second coil 12 and the fourth coil 14 is connected so that they cross each other. Also, the other terminal of the first coil 11 and the second coil 12 is connected to a power supply, and the other terminal of the third coil 13 and the fourth coil 14 is connected to a load.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a common mode choke coil for preventing noise used in consumer or industrial electronic equipment.

[0002]

2. Description of the Related Art A conventional technique will be described with reference to FIGS. FIG. 47 is an exploded perspective view showing a conventional common mode choke coil, FIG. 48 is a perspective view of a completed product, and FIGS.
Numeral 0 indicates the direction in which the magnetic flux generated by the current flowing through the common mode choke coil is generated in the connection diagram. According to the figure, 1 is the first coil, 2 is the second coil, 3 is the third coil, 4 is the fourth coil, 1a is the first coil.
2a is a lead-out terminal at the beginning of winding of the second coil 2, 3a is a lead-out terminal at the end of winding of the third coil 3, and 4a is a lead-out terminal at the end of winding of the fourth coil 4. Terminals 7 are magnetic cores forming a square-shaped closed magnetic circuit, 8, 9
Is a magnetic leg of the magnetic core 7, 5 is a power supply, 6 is a load, 10a is a line current, 10b is a current flowing in the same direction, and f is a magnetic flux.

The configuration and operation will be described below. The winding start of the first coil 1 in which the rectangular wire is wound edgewise is defined as a lead terminal 1a, and the winding end of the third coil 3 wound in the opposite direction from the winding end of the first coil 1 to the winding end. Is a lead terminal 3a. Similarly, the start of winding of the second coil 2 is defined as an extraction terminal 2a, and the end of winding of the fourth coil 4 wound in the opposite direction from the end of winding of the second coil 2 is defined as an extraction terminal 4a.
a. The wound first coil 1 and second coil 2 are inserted into one magnetic leg 8 of a magnetic core 7 forming a square-shaped closed magnetic circuit, and the third coil 4 and the fourth coil 4 It is inserted into the other magnetic leg 9 of the magnetic core 7.

A lead terminal 1a of the first coil 1 and a lead terminal 2a of the second coil 2 are connected to a power supply 5, and a lead terminal 3a of the third coil 3 and a lead terminal 4a of the fourth coil 4 are connected to a load. 6 is connected. At this time, the line current 10a flows from the power source 5 to the second coil 2, the fourth coil 4, the load 6, the third coil 3, the first coil 1, and the power source 5, and the first current is generated by the line current 10a. Coil 1
And the second coil 2, the second coil 2 and the third coil 3,
Third coil 4, fourth coil 4, and fourth coil 4
And the magnetic flux f generated in the first coil 1 are generated in directions to cancel each other, and the magnetic flux f generated in the first coil 1 and the third coil 3 and the second coil 2 and the fourth coil 4 are generated.
Are generated in the energizing directions, respectively, and the magnetic flux f generated in the first coil 1, the second coil 2, the third coil 3, and the fourth coil 4 by the current 10b flowing in the same direction is each applied. And the first coil 1 and the third coil 3 inserted in the magnetic legs 8 and 9 of the magnetic core 7, respectively.
And the second coil 4 and the fourth coil 4 are arranged on the magnetic legs 8 and 9 so as to be parallel to each other.

[0005]

However, in the above configuration, magnetic coupling between the coils is low and magnetic flux leakage is large, so that magnetic saturation tends to occur when a large current is applied. In order to prevent the magnetic saturation, if the cross-sectional area of the magnetic core 7 is increased, the size of the magnetic core 7 is increased and the cost is increased.
Alternatively, when a magnetic core material having a high saturation magnetic flux density is used, the magnetic permeability is generally low, which also causes an increase in size and cost in order to obtain a required inductance value.

An object of the present invention is to provide a small-sized common mode choke coil corresponding to a large current application by improving the magnetic coupling between the coils.

[0007]

In order to solve the above-mentioned problems, a common mode choke coil according to the present invention comprises a first coil, a second coil, a third coil and a third coil each having a rectangular wire wound edgewise. 4 and a magnetic core forming a square-shaped closed magnetic circuit. The first and second coils are mounted on one of the magnetic legs of the magnetic core, and the third and fourth coils are mounted on the other opposing magnetic leg. Are arranged in series, the first and third coils and the second and fourth coils are connected in series, and the first and second coils, the second and third coils, the third and The magnetic fluxes generated in the fourth coil and the fourth and first coils are canceled, and the magnetic fluxes generated in the first and third coils and the second and fourth coils are energized with each other and further flow in the same direction. The magnetic flux generated in the first, second, third, and fourth coils by the current is In the common mode choke coil for changing the winding direction of each coil to be respectively energized, the first and fourth coils, in which the second and third coil was arranged to be parallel. With the above configuration, the magnetic coupling between the coils is improved and the leakage magnetic flux with respect to the line current is reduced, so that magnetic saturation is less likely to occur even if the cross-sectional area of the core is reduced, and a small common mode choke that can be used for large current applications A coil is provided.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The invention according to claim 1 of the present invention comprises a first coil, a second coil, a third coil, a fourth coil, and a rectangular coil wound edgewise. And a magnetic core forming a closed magnetic circuit having a U-shape. The first and second coils are arranged on one magnetic leg of the magnetic core, and the third and fourth coils are arranged on the other opposing magnetic leg. The first and third coils and the second and fourth coils are connected in series, and the first and second coils, the second and third coils, the third and fourth coils, and The magnetic fluxes generated in the fourth and first coils are canceled out, the magnetic fluxes generated in the first and third coils and the magnetic fluxes generated in the second and fourth coils are energized with each other, and furthermore, the first and the second currents flow in the same direction. Second,
In a common mode choke coil in which the winding directions of the coils are changed so that the magnetic fluxes generated in the third and fourth coils are energized, the first and fourth coils and the second and third coils are arranged in parallel. Since the flat wire is wound edgewise, the distance between the centers of the first and second coils and the third and fourth coils facing each other is reduced. As a result, the magnetic coupling between the coils can be greatly improved.

Further, since the magnetic coupling is high and the leakage magnetic flux can be reduced, even when the cross-sectional area of the magnetic core is small, normal mode magnetic saturation hardly occurs and a large line current can flow.

Further, it is possible to use a high permeability magnetic core having a relatively low saturation magnetic flux density, and it is possible to make the magnetic core thin while securing the inductance.

Further, since the wire length of the coil wound around the magnetic core is shortened and the temperature rise during energization can be reduced even when the cross-sectional area of the rectangular wire is reduced, the volume ratio can be reduced by about 50%.

Further, since the coil is wound so that the winding start and the winding end are distant from each other, the stray capacitance between the winding start and the winding end is reduced, and the impedance characteristic in a high frequency region is improved.

According to a second aspect of the present invention, a magnetic core for forming a square-shaped closed magnetic circuit is formed as an integral body without a butt portion, and has the same effect as that of the first embodiment. In addition, by using a square-shaped core with no gap, a high effective magnetic permeability can be obtained and the cross-sectional area of the core can be reduced, and the wire length of the coil wound around the core is shortened. Even if the cross-sectional area of the rectangular wire is reduced, the rise in temperature during energization can be reduced, thereby reducing the size and cost.

According to a third aspect of the present invention, a U-shaped magnetic core is abutted as a magnetic core of a U-shaped closed magnetic circuit, and the same effect as in the first embodiment can be obtained. In addition,
Since each of the four coils is wound independently, it can be wound with a simple jig and work, and can be easily assembled by inserting a U-shaped butt-type magnetic core.

According to a fourth aspect of the present invention, a U-shaped magnetic core and an I-shaped magnetic core are joined to each other as a magnetic core of a square-shaped closed magnetic circuit. Since each coil is wound independently, it can be wound with a simple jig and work, and can be easily assembled by inserting a U-shaped butt-type magnetic core. Furthermore, since the butting portion of the magnetic core is exposed outside the coil, the work of butting is facilitated, and the appearance confirmation work after assembly is also facilitated.

[0016] The invention according to claim 5 of the present invention provides the following.
The second, third, and fourth coils are configured using independent coils. Since the four coils are individually wound, they can be wound with a simple jig and work. At the time of mounting, the connection method can be set according to the surrounding conditions.

The invention according to claim 6 of the present invention is characterized in that
The fourth independent coil has a configuration in which a terminal portion is provided at one end and a connection portion is provided at the other end, and the connection portion facilitates connection with another coil.

According to a seventh aspect of the present invention, when each of the connection portions of the first and third coils and the second and fourth coils is mounted on a magnetic core, one of them is one side of the magnetic core. The other side is provided and connected so as to be located on the other side, and the insulation distance between the two connecting portions is secured in the vertical direction, so that the mounting area of the common mode choke coil can be reduced.

The invention according to claim 8 of the present invention is characterized in that each of the first and third coils and the second and fourth coils is connected to one of the coils by the other coil. This is a configuration in which a protruding portion protruding toward the connection portion is provided, and an insulating distance can be ensured by the protruding portion.

According to a ninth aspect of the present invention, the connecting portions of the first and third coils and the second and fourth coils are connected by ultrasonic welding or soldering. By connecting the members by ultrasonic welding or soldering, the contact resistance is small, the amount of heat generation is reduced, and the element can be downsized.

According to a tenth aspect of the present invention, the first aspect
In this configuration, all the connecting portions of the fourth to fourth coils are projected to one side, and the connecting portions are connected to the first and third coils and the second and fourth coils via a bus bar. By using a bus bar, the four coils can be wound in the same shape, so that the winding process can be simplified.

According to the eleventh aspect of the present invention, the first aspect
The first and third coils, and the second and fourth coils are connected by projecting all the connection portions of the fourth to fourth coils to the other side and mounted on a printed board, and are connected on the pattern of the printed board. Thus, the four coils can be wound in the same shape, so that the winding process can be simplified. Further, by increasing the surface area of the pattern, the heat dissipation is improved and the size can be reduced.

According to a twelfth aspect of the present invention, the first aspect
And the third coil and the second and fourth coils are formed by a continuous rectangular wire. The two coils are continuously wound, and the connection by welding or the like is eliminated to reduce the contact resistance at the contact portion. An increase in DC resistance can be eliminated, and a rise in temperature during energization can be reduced, and the size of the common mode choke coil can be reduced. Further, since a connecting step is not required, cost reduction, man-hour reduction and quality stabilization can be achieved, and further, as two coils are formed as one part, assembly becomes easy. Also, when the rectangular copper wire is coated, the safety can be improved because the live part is not exposed at the connection part.

According to a thirteenth aspect of the present invention, the first aspect
And one of the continuation of the third coil and the continuation of the second and fourth coils is positioned on one side of the core and the other on the other side when mounted on the core. Yes, 2
Since the insulation distance between the two connection portions is secured in the vertical direction, the mounting area of the common mode choke coil can be reduced.

According to a fourteenth aspect of the present invention, the first aspect
And a continuous portion of the third coil and a continuous portion of the second and fourth coils. The connection portion is bent only in the thickness direction. By doing so, the stress applied to the copper wire and the coating is small, and a rise in temperature due to an increase in DC resistance and deterioration in quality can be reduced.

According to a fifteenth aspect of the present invention, the first aspect
And a continuous portion of the third coil and a continuous portion of the second and fourth coils are provided with a bent portion folded in two stages,
Since the connecting portion is bent in two steps in the thickness direction, stress applied to the copper wire and the coating is small, and deterioration in quality can be reduced.

According to a sixteenth aspect of the present invention, each coil mounted on the magnetic core is insulated from the magnetic core with an insulator, and the insulation distance between the coils or between the coil and the magnetic core is determined by the creepage distance of the insulator. Therefore, the spatial distance can be reduced and the size can be reduced. further,
Since the distance between the centers of the two coils facing each other, the first and fourth coils, and the second and third coils can also be reduced, the magnetic coupling can be further increased.

In the invention according to claim 17 of the present invention, the insulator is a coil bobbin and an insulating plate, and the number of parts can be reduced because the insulator is also used as the coil bobbin. Further, the position between each coil and the magnetic core can be maintained by the coil bobbin and the insulating plate, so that a common mode choke coil having stable performance and quality can be obtained.

The invention according to claim 18 of the present invention is characterized in that the insulator is constituted by a terminal board provided with a coil bobbin and an insulating plate, and a lead portion of each coil is fixed by a hole in the terminal board. Pin pitch and position are determined accurately.

According to a nineteenth aspect of the present invention, a structure in which a coil bobbin and one of the insulating plates are integrated as an insulator is used. Points can be reduced. Further, since the coil bobbin and the insulating plate are integrated, the position between each coil and the magnetic core can be maintained, and a common mode choke coil having stable performance and quality can be obtained.

According to a twentieth aspect of the present invention, there is provided a structure in which an insulator is provided in a portion adjacent to each of the coils mounted on the magnetic core, and the insulation distance between the coils is secured by the creepage distance of the insulator. Because of this, the spatial distance can be shortened, and the size can be reduced. Further, the distance between the centers of the two coils facing each other, the first coil and the fourth coil, and the center distance between the second coil and the third coil can be reduced, so that the magnetic coupling can be further increased.

According to a twenty-first aspect of the present invention, the insulator for insulating the coils is formed so as to cover the outer peripheral portion between the adjacent coils, and the insulator is stretched in the height direction. Without this, the insulation distance between the coils can be ensured by the creepage distance of the portion covered with the insulator, so that the spatial distance can be reduced and the size can be further reduced.

According to a twenty-second aspect of the present invention, an insulator for insulating the coils is provided integrally with the coil bobbin, and the insulator between the coils is extended without extending the insulator in the height direction. Can be secured by the creepage distance of the portion covered with the insulator, so that the spatial distance can be reduced and the size can be further reduced. In addition, since the coil bobbin and the insulating plate are integrated, the position between each coil and the magnetic core can be maintained, and a common mode choke coil having stable performance and quality can be obtained.

Hereinafter, an embodiment of the present invention will be described with reference to FIGS.
This will be described with reference to FIG. (Embodiment 1) A first embodiment of the present invention will be described with reference to FIGS. FIG. 1 is an exploded perspective view, FIG. 2 is a perspective view of a completed product, and FIGS. 3 and 4 are connection diagrams showing directions in which magnetic flux generated by a current flowing is generated. FIG.
Is a DC superimposition characteristic diagram comparing the embodiment with the conventional product, and FIG. 6 is a frequency characteristic diagram of impedance comparing the embodiment with the conventional product.

According to the drawing, 11, 12, 13 and 14 are first coils each having a rectangular wire wound edgewise,
Second coil, third coil and fourth coil, 17
Is a magnetic core constituting a square-shaped closed magnetic circuit, 18 and 19 are magnetic legs of the magnetic core 17, 15 is a power supply, 16 is a load, 20a is a line current, 20b is a current flowing in the same direction, and f is a magnetic flux.

The configuration and operation will be described below. The first coil 11 and the second coil 11 each having a rectangular wire wound edgewise.
Coil 12 is inserted into one magnetic leg 18 of a magnetic core 17 forming a square-shaped closed magnetic path, and the third coil 13 and the fourth coil 14 are inserted into the other magnetic leg 19 of the magnetic core 17 facing the other. Is done. At this time, the first coil 11 and the fourth coil 1
4. The second coil 12 and the third coil 13 are arranged so as to be arranged side by side. In addition, the first coil 11 and the third coil 11
, And the wiring of one terminal for connecting the second coil 12 and the fourth coil 14 is connected so as to cross each other. The other terminals of the first coil 11 and the second coil 12 are connected to a power supply 15, and the other terminals of the third coil 13 and the fourth coil 14 are connected to a load 16.

At this time, the line current 20a from the power source 15 is supplied to the second coil 12, the fourth coil 14, the load 16,
Flows to the coil 13, the first coil 11, and the power supply 15,
The first coil 11 and the second coil 12, and the second coil 12 and the third coil 1 are controlled by the line current 20a.
3. The magnetic flux f generated in the third coil 13 and the fourth coil 14 and the magnetic flux f generated in the fourth coil 14 and the first coil 11 are generated in directions to cancel each other, and the first coil 11 and the third coil 13, the magnetic flux f generated in the second coil 12 and the fourth coil 14 is generated in the energizing direction, and the first coil 11, the second coil 12, and the second coil 12 are generated by a current 20 b flowing in the same direction. 3 coils 1
The magnetic flux f generated in the third and fourth coils 14 is configured such that the winding direction is changed so as to be generated in the direction in which each is energized.

By alternately arranging the divided coils 11 to 14, the magnetic coupling is increased. Further, by winding a rectangular wire edgewise, two coils facing each other, the first coil 11 and the Since the center distance between the second coil 12 and the third coil 13 and the fourth coil 14 can be shortened and the magnetic coupling can be increased, the leakage magnetic flux becomes small, and the magnetic saturation in the normal mode even when the cross-sectional area of the magnetic core is small. Is less likely to occur and the DC superimposition characteristics are improved, and a large line current can flow. FIG. 5 shows a result of a DC superposition characteristic diagram comparing the first embodiment and the conventional product.

As a result, it is possible to use a high magnetic permeability core having a relatively low saturation magnetic flux density, and it is possible to make the magnetic core 17 thin while securing the inductance.

Each coil 1 wound around the magnetic core 17
The volume ratio of about 50% can be reduced because the wire length of 1 to 14 is shortened and the temperature rise during energization can be reduced even if the cross-sectional area of the wire is reduced.
Can be miniaturized.

Further, since the coil is wound so that the winding start and the winding end are distant, the stray capacitance between the winding start and the winding end is reduced, and the impedance characteristics in a high frequency region are improved.

FIG. 6 shows the frequency characteristic of impedance in comparison between the first embodiment and a conventional product.

(Embodiment 2) A second embodiment of the present invention will be described with reference to FIGS. FIG. 7 is an exploded perspective view, FIG. 8 is a perspective view of a completed product, and FIGS. 9 and 10 show connection directions in which magnetic fluxes generated by current flowing are generated. According to the figure, 21, 22, 23, and 24 are first coils each having a rectangular wire wound edgewise,
Second coil, third coil and fourth coil, 17
, A magnetic core constituting a square-shaped closed magnetic circuit, 18 and 19 are magnetic legs of the magnetic core 17, 15 is a power supply, 16 is a load, 20a is a line current, and 20b is a current flowing in the same direction.

The configuration and operation will be described below. The first coil 21 and the second coil 21 each having a rectangular wire wound edgewise.
Is inserted into one magnetic leg 18 of the magnetic core 17 forming a square-shaped closed magnetic circuit, and the third coil 23 and the fourth coil 24 are inserted into the other magnetic leg 19 of the magnetic core 17 facing the other. Is done. At this time, the first coil 21 and the third coil 2
3. The second coil 22 and the fourth coil 24 are in a crossing positional relationship. Therefore, the wiring of one terminal connecting the first coil 21 and the third coil 23 and the wiring of the one terminal connecting the second coil 22 and the fourth coil 24 are connected so as to cross each other.
The other terminals of the first coil 21 and the fourth coil 24 are connected to the power supply 15, and the other terminals of the second coil 22 and the third coil 23 are connected to the load 16.

At this time, the line current 20a from the power source 15 is supplied to the fourth coil 24, the second coil 22, the load 16,
Flows to the coil 23, the first coil 21, and the power supply 15,
The first coil 21 and the second coil 22, and the second coil 22 and the third coil 2 are controlled by the line current 20a.
3. The magnetic flux f generated in the third coil 23 and the fourth coil 24 and the magnetic flux f generated in the fourth coil 24 and the first coil 21 are generated in directions to cancel each other, and the first coil 21 and the third coil The magnetic flux f generated in each of the first coil 21, the second coil 22, and the fourth coil 24 is generated in the energizing direction, and the current 20b flows in the same direction. 3 coils 2
The magnetic flux f generated in the third and fourth coils 24 is wound so as to be generated in the energizing direction.

With this configuration, the same effect as in the first embodiment can be obtained. (Embodiment 3) A third embodiment of the present invention will be described with reference to FIGS. FIG. 11 is an exploded perspective view,
FIG. 12 is a perspective view of the completed product. According to FIG.
Reference numerals 2, 33, and 34 denote a first coil, a second coil, a third coil, and a fourth coil, respectively, each of which has a rectangular wire wound edgewise, and 37 denotes a U-shaped butted magnetic core. After the four coils 31, 32, 33, and 34 are separately wound in advance and positioned, the first coil 31 and the third coil 33, and the second coil 32 and the fourth coil 34 are separated. The U-shaped magnetic cores 37 connected to each other are inserted into the above-mentioned coils 31 to 34, and butted.

With the above configuration, in addition to the same effects as those of the first embodiment, since the four coils 31 to 34 are individually wound, they can be wound by a simple jig and work. A U-shaped magnetic core 37 is provided in the coils 31 to 34.
Can be easily assembled by inserting them so as to abut each other.

(Embodiment 4) A fourth embodiment of the present invention will be described with reference to FIGS. FIG. 13 is an exploded perspective view, and FIG. 14 is a perspective view of a completed product. According to the figure, reference numerals 41, 42, 43, and 44 denote a first coil, a second coil, a third coil, and a fourth coil, respectively, each of which has a rectangular wire wound edgewise, and 47 denotes an I-shaped magnetic core. , 4
8 is a U-shaped magnetic core. Four of the coils 41, 4
After the coils 2, 43 and 44 are separately wound in advance and positioned, the first coil 41 and the third coil 43 are connected, and the second coil 42 and the fourth coil 44 are connected to each other. The U-shaped magnetic core 47 and the U-shaped magnetic core 48 are
Nos. 1 to 44 and butted. With the above configuration, in addition to the same effects as those of the first embodiment, the four coils 41 to
Each of the coils 41 to 44 can be wound by a simple jig and work because each of the coils 44 is wound independently.
The U-shaped and I-shaped magnetic cores 47, 48 can be inserted into each other so as to abut each other to facilitate assembly.

(Embodiment 5) A fifth embodiment of the present invention will be described with reference to FIG. FIG. 15 is a perspective view of the completed product. According to the drawing, reference numerals 51, 52, 53, and 54 denote a first coil, a second coil, a third coil, and a fourth coil, respectively, each of which has a rectangular wire wound edgewise.
Numeral 57 denotes a magnetic core forming a square-shaped closed magnetic path, and 58 denotes solder. After the four coils 51, 52, 53, 54 are separately wound in advance and positioned, the first coil 51 and the third coil 53, and the second coil 52 and the fourth coil 54 are separated. Each of the coils is connected by solder, and a square-shaped magnetic core 57 is incorporated in each of the coils 51 to 54.

Therefore, in addition to the same effects as in the third embodiment,
By connecting the coils 51 to 54 with the solder 58, the contact resistance is small, the amount of heat generation is reduced, and the size of the element can be reduced.

(Embodiment 6) A sixth embodiment of the present invention will be described with reference to FIGS. FIG. 16 is an exploded perspective view, and FIG. 17 is a perspective view of a completed product. According to the figure, reference numerals 61, 62, 63, and 64 denote first, second, third, and fourth coils, respectively, each of which has a rectangular wire wound edgewise, and 67 denotes a square-shaped closed magnetic field. The magnetic core 68 forming the path is a bus bar. After the four coils 61, 62, 63, 64 are separately wound in advance and positioned, the first coil 61 and the third coil 63, and the second coil 62 and the fourth coil 64 are separated. The magnetic core 67 is connected to each of the coils 61 by the bus bars 68.
~ 64.

Therefore, in addition to the same effects as in the third embodiment,
By connecting the coils 61 to 64 using the bus bar 68, the four coils 61 to 64 can be wound in the same shape, so that the process of winding the wire into a rectangular wire edgewise is simplified. Can be.

(Seventh Embodiment) A seventh embodiment of the present invention will be described with reference to FIGS. 18 is an exploded perspective view, FIG. 19 is a perspective view of a completed product, and FIG. 20 is a pattern diagram of a printed circuit board. According to the figure, 71, 72,
Reference numerals 73 and 74 denote a first coil, a second coil, a third coil, and a fourth coil, respectively, in which a rectangular wire is wound edgewise.
, 77 denotes a U-shaped magnetic core forming a square-shaped closed magnetic circuit, and 78 denotes a printed circuit board. After the four coils 71, 72, 73, and 74 are separately wound in advance and positioned, the first coil 71 and the third coil 73, and the second coil 72 and the fourth coil 74 are separated. Each is connected on a pattern of a printed board 78, and a magnetic core 77 is incorporated in each of the coils 71 to 74.

Therefore, in addition to the same effects as in the third embodiment,
By connecting on the pattern of the printed circuit board 78, 4
Since the three coils 71 to 74 can be wound in the same shape, the winding process can be simplified. Further, by increasing the surface area of the pattern, the heat dissipation is improved and the size can be reduced.

(Eighth Embodiment) An eighth embodiment of the present invention will be described with reference to FIGS. FIG. 21 is an exploded perspective view, and FIG. 22 is a perspective view of a completed product. According to the figure, reference numerals 81, 82, 83, and 84 denote first, second, third, and fourth coils, respectively, each of which has a rectangular wire wound edgewise, and 87 denotes a square-shaped closed magnetic field. It is a U-shaped magnetic core that forms a path. Four of the above coils 8
1, 82, 83, and 84 are wound separately in advance and positioned, and then the first coil 81 and the third coil 8 are wound.
3. The second coil 82 and the fourth coil 84 are connected by ultrasonic welding, respectively, and the magnetic core 87 is connected to each of the coils 81 to 84.
It is built into.

Therefore, in addition to the same effects as in the third embodiment,
By connecting the coils 81 to 84 by ultrasonic welding, the coils can be connected without using other parts or materials, so that cost reduction, simplification of the process, and improvement in reliability can be achieved. Further, since the contact resistance of the connection portion is small, the rise in temperature during energization can be reduced, and the size of the common mode choke coil can be reduced.

(Embodiment 9) A ninth embodiment of the present invention will be described with reference to FIGS. FIG. 23 is an exploded perspective view, and FIG. 24 is a perspective view of a completed product. According to the figure, reference numerals 91, 92, 93, and 94 denote a first coil, a second coil, a third coil, and a fourth coil, respectively, in which a rectangular wire is wound edgewise, and 97 is a square-shaped closed magnetic field. It is a U-shaped magnetic core that forms a path. Here, the first coil 9
The first and third coils 93, the second coil 92 and the fourth coil 94 are bent in the width direction and the thickness direction of the rectangular copper wire at the respective lead portions, and are continuously wound continuously. The magnetic core 97 is incorporated in the coils 91 to 94.

Therefore, in addition to the same effects as in the first embodiment,
Since the two coils are wound continuously, there is no connection by welding, etc., and the increase in DC resistance due to the contact resistance at the connection part is eliminated, so that the temperature rise during energization can be reduced and the size of the common mode choke coil can be reduced. Can be planned. Further, since a connecting step is not required, cost reduction, man-hour reduction and quality stabilization can be achieved, and further, as two coils are formed as one part, assembly becomes easy.
Also, when the rectangular copper wire is coated, the safety can be improved because the live part is not exposed at the connection part.

(Embodiment 10) A tenth embodiment of the present invention will be described with reference to FIGS. FIG.
5 is an exploded perspective view, and FIG. 26 is a perspective view of a completed product. According to the figure, 101, 102, 103, and 104 are a first coil, a second coil, a third coil, and a fourth coil, each of which has a rectangular wire wound edgewise, and 107 is a square-shaped closed magnetic field. It is a U-shaped magnetic core that forms a path. Here, the first coil 101 and the third coil 103, and the second coil 102 and the fourth coil 104 are folded and bent continuously in the width direction of the rectangular copper wire at the respective lead portions, and are continuously wound. Has been turned. The coils 101 to 104
The magnetic core 107 is incorporated in the first embodiment.

Therefore, in addition to the same effects as in the ninth embodiment,
Since the connection portion is bent only in the thickness direction, stress applied to the copper wire and the coating is small, and a rise in temperature due to an increase in DC resistance and deterioration in quality can be reduced.

(Eleventh Embodiment) An eleventh embodiment of the present invention will be described with reference to FIGS. FIG.
7 is an exploded perspective view, and FIG. 28 is a perspective view of a completed product. According to the figure, reference numerals 111, 112, 113, and 114 denote first, second, third, and fourth coils, respectively, each of which has a rectangular wire wound edgewise, and 117 denotes a square-shaped closed magnetic field. It is a U-shaped magnetic core that forms a path. Here, the first coil 111 and the third coil 113, and the second coil 112 and the fourth coil 114 are folded and bent in two stages in the thickness direction of the rectangular copper wire at the respective lead portions. It is continuously wound continuously. The magnetic core 107 is incorporated in the coils 111 to 114.

Therefore, in addition to the same effects as in the ninth embodiment,
Since the connection portion is bent in two stages in the thickness direction, stress applied to the copper wire and the coating is small, and deterioration in quality can be reduced.

(Twelfth Embodiment) A twelfth embodiment of the present invention will be described with reference to FIG. FIG. 29 is a top view of the completed product. According to the figure, 121, 122, 12
Reference numerals 3 and 124 denote a first coil, a second coil, a third coil and a fourth coil, respectively, 127 denotes a square-shaped magnetic core having no gap, and 128 denotes a magnetic leg of the magnetic core 127. The coils 121, 122, 123, and 124 are wound around the magnetic legs 128 of the magnetic core 127, respectively, and then the first coil 121 and the third coil 123, and the second coil 122 and the fourth coil 124. Is connected.

Therefore, in addition to the same effects as in the first embodiment,
By using a square-shaped magnetic core 127 having no gap, a high effective magnetic permeability can be obtained and the cross-sectional area of the magnetic core can be reduced, and the coil 1 wound around the magnetic core 127 can be obtained.
Even when the wire length of the wires 21 to 124 is shortened and the cross-sectional area of the flat wire is reduced, the rise in temperature during energization can be reduced, so that the size and cost can be reduced.

(Thirteenth Embodiment) A thirteenth embodiment of the present invention will be described with reference to FIG. FIG. 30 is a top view of the finished product. According to the figure, 131, 132, 13
Reference numerals 3 and 134 denote a first coil, a second coil, a third coil, and a fourth coil, respectively, in which a flat wire is wound edgewise.
The coil 127 has a square-shaped magnetic core without a gap.
28 is a magnetic leg of the magnetic core 127. Here, the first coil 131 and the third coil 133, and the second coil 132 and the fourth coil 134 are continuously wound around the magnetic legs 128 of the magnetic core 127 at respective lead portions.

Therefore, in addition to the same effects as in the twelfth embodiment, the continuous winding of each of the coils 131 to 134 can eliminate an increase in DC resistance and reduce a temperature rise during energization. Can be reduced in size. In addition, since a connection step is not required, cost reduction and quality stabilization can be achieved. Further, when a rectangular copper wire is coated, a live part is not exposed at a connection portion, so that safety can be improved.

(Embodiment 14) A fourteenth embodiment of the present invention will be described with reference to FIGS. FIG.
1 is an exploded perspective view, and FIG. 32 is a perspective view of a completed product. According to the figure, 141, 142, 143, and 144 are first, second, third, and fourth coils each having a rectangular wire wound edgewise, and 147 is a square-shaped closed magnetic field. A U-shaped magnetic core forming a path, 148 is a magnetic leg of the magnetic core 147, 149 is a connecting portion between the two magnetic legs 148 of the magnetic core 147, and 145 is a coil 141, 14
2, 143, 144 and each of the coils 141, 14
2, 143, 144 and the magnetic leg 148, a cylindrical portion 145a that fits into the magnetic leg 148, a collar 145b provided in the middle of the cylindrical portion 145a, and an outer periphery of the collar 145b. An outer cylindrical portion 145c provided in a cylindrical shape,
The coil 14 provided adjacent to and adjacent to a part of the outer cylinder portion 145c
Insulating wall 1 for insulating between 1 and 144 and between 142 and 143
45d is a coil bobbin, and 146 is each coil 1
Holes 146a through which the magnetic legs 148 for insulating the connection portions 149 between the magnetic cores 147, 41, 142, 143, 144 and the magnetic core 147 are formed.
This is an insulating plate provided individually. The coils 141 and 14
2, 143 and 144 are inserted into the coil bobbin 145 to connect the first coil 141 and the third coil 143, and the second coil 142 and the fourth coil 144, and then fit the insulating plate 146 to the magnetic core. 147 to the coil bobbin 145
Has been inserted.

Therefore, in addition to the same effects as in the first embodiment,
By providing the coil bobbin 145 and the insulating plate 146, the coils 141, 142, 143, 144 or the coils 141, 142, 143, 144 and the magnetic core 1 are provided.
Since the creepage distance between the 47 can be sufficiently ensured, the size can be reduced. Further, two coils facing each other, the first coil 141, the second coil 142, and the third coil 143
Since the distance between the centers of the first and fourth coils 144 can be reduced, the magnetic coupling can be further increased.

(Embodiment 15) A fifteenth embodiment of the present invention will be described with reference to FIGS. FIG.
3 is an exploded perspective view, and FIG. 34 is a perspective view of a completed product. According to the figure, 151, 152, 153 and 154 are a first coil, a second coil, a third coil and a fourth coil, each of which has a rectangular wire wound edgewise, and 147 is a square-shaped closed magnetic field. A U-shaped magnetic core forming a path, 148 is a magnetic leg of the magnetic core 147, 149 is a connecting portion of the two magnetic legs 148 of the magnetic core 147, and 155 is each of the coils 151, 15
2,153,154 and each of the coils 151,15
2, 153, 154 and the magnetic leg 148, a cylindrical portion 155a that fits into the magnetic leg 148, a flange 155b provided in the middle of the cylindrical portion 155a, and an outer periphery of the flange 155b. An outer cylindrical portion 155c provided in a cylindrical shape;
The coil 15 arranged adjacent to a part of the outer cylindrical portion 155c
Insulating wall 1 for insulating between 1 and 154 and between 152 and 153
A coil bobbin 55d and 55
51, 152, 153, 154 and the connection portion 149 of the magnetic core 147, the magnetic core 14
7 and a terminal plate provided with a side plate 156b having a notch 156a into which an end of the cylindrical portion 155a of the coil bobbin 155 is fitted. 160 is provided on the bottom surface of the terminal plate 156 and is a lead portion of each of the coils 151, 152, 153 and 154. A hole for inserting and fixing the position. Each of the coils 151, 1
52, 153, and 154 are inserted into the coil bobbin 155 and connected to the first coil 151 and the third coil 153, and the second coil 152 and the fourth coil 154, and then connected to the coils 151, 152, 153, and 154. The drawer is inserted into the hole 160 of the terminal plate 156, and the coil bobbin 155
And the terminal plate 156 are fitted, and the magnetic core 147 is inserted into the coil bobbin 155.

Therefore, in addition to the same effect as in the fourteenth embodiment, the lead-out portion of each coil is
Since it is fixed at 0, the pin pitch and position are accurately determined.

(Embodiment 16) A sixteenth embodiment of the present invention will be described with reference to FIGS. FIG.
5 is an exploded perspective view, and FIG. 36 is a perspective view of a completed product. According to the figure, 161, 162, 163, 164 are the first coil, the second coil, the third coil, and the fourth coil, each of which has a rectangular wire wound edgewise, and 167 is a square-shaped closed magnetic field. A U-shaped magnetic core 165 that forms a path includes a flange 165a for insulating the coils 161, 162, 163, and 164 from each other, an outer cylindrical portion 165b provided on the outer periphery of the flange 165a, and An insulator 166 composed of a vertical insulating wall 165c that insulates between the coils in a part of the cylindrical portion 165b is a coil 161, 162, 163, 1.
This is a coil bobbin including an insulating plate 166a for insulating between the magnetic core 64 and the magnetic core 167 and a cylindrical portion 166b for inserting a coil. The coils 161, 162, 163, 164 are positioned with the insulator 165 sandwiched therebetween and the coil bobbin 166 is positioned.
And the first coil 161 and the third coil 1
63, after connecting the second coil 162 and the fourth coil 164, the magnetic core 167 is inserted into the coil bobbin 166.

Therefore, the same effect as that of the fourteenth embodiment can be obtained. (Embodiment 17) A seventeenth embodiment of the present invention will be described with reference to FIGS. FIG. 37 is an exploded perspective view, and FIG. 38 is a perspective view of a completed product. According to FIG.
1, 172, 173, and 174 each have a first coil, a second coil, a third coil, and a fourth coil formed by winding a rectangular wire edgewise, and 147 forms a square-shaped closed magnetic path. A U-shaped magnetic core, 148 is a magnetic leg of the magnetic core 147, 149 is a connecting portion of the two magnetic legs 148 of the magnetic core 147, 175 is each of the coils 171, 172, 172,
174, two cylindrical portions 175a for insulating the first coil 171 and the fourth coil 174 from the magnetic legs 148 of the magnetic core 147, and a flange portion 175b at an end. And a coil bobbin 178 made of an insulating wall 175d that insulates between adjacent coils adjacent to a part of the outer cylindrical portion 175c, and 178 includes a second coil 172 and a third coil 173. Insulating plate 17 that insulates between magnetic leg 148 and connecting portion 149 of magnetic core 147
The coil bobbin 176 composed of the cylindrical portion 8a and the cylindrical portion 178b is provided with two holes 176a for passing the magnetic legs 148 that insulate between the first coil 171 and the fourth coil 174 and the connecting portions 149 of the magnetic legs 148 of the magnetic core 147. Insulating plate. The first coil 171 and the fourth coil 174 are inserted into a coil bobbin 175, and the second coil 172 and the third coil
Is inserted into the coil bobbin 178. Coil bobbin 175, coil bobbin 178 and insulating plate 1
76 is fitted, and the first coil 171 and the third coil 1
73, after connecting the second coil 172 and the fourth coil 174, respectively, are inserted into the coil bobbins 175, 178 and the insulating plate 176 in which the magnetic core 147 is fitted.

Therefore, the same effect as that of the fourteenth embodiment can be obtained. (Embodiment 18) An eighteenth embodiment of the present invention will be described with reference to FIGS. FIG. 39 is an exploded perspective view, and FIG. 40 is a perspective view of a completed product. According to FIG.
Reference numerals 1, 182, 183, and 184 each form a first coil, a second coil, a third coil, and a fourth coil, each of which has a rectangular wire wound edgewise, and 147 forms a square-shaped closed magnetic path. A U-shaped magnetic core, 148 is a magnetic leg of the magnetic core 147, 149 is a connection between the two magnetic legs 148 of the magnetic core 147, and 185 is each of the coils 181, 182, 183,
Two cylindrical portions 185a that insulate between the first coil 181 and the fourth coil 184 and the magnetic leg 148 of the one magnetic core 147, and the collar portion 1 provided at the end thereof.
85b, an outer cylindrical portion 185c provided in a cylindrical shape around the outer periphery of the collar portion 185b, and an insulating wall 1 provided in a part of the outer cylindrical portion 185c to insulate between coils arranged in parallel in a vertical direction.
The coil bobbin made of 85d, 188 is the second coil 1
82, an insulating plate 188 that insulates the third coil 183 from the magnetic legs 148 of the other magnetic core 147 and the connection portion 149;
a and a coil bobbin comprising two cylindrical portions 188b, 18
Reference numeral 6 denotes an upper end that insulates the connection between the first coil 181 and the fourth coil 184 and the connecting portion 149 of the magnetic leg 148 of the one magnetic core 147, and the magnetic core 147 and the cylindrical portion 185 a of the coil bobbin 185 are fitted. Notch 186
This is a terminal plate including a side plate 186b having a. The first coil 181 and the fourth coil 184 are inserted into a coil bobbin 185, and the second coil 182 and the third coil 183 are inserted into a coil bobbin 188. The coil bobbin 185 and the coil bobbin 188 are fitted, and the first coil 181, the third coil 183, and the second coil 18
After connecting the second and fourth coils 184, respectively, the lead portions of the coils 181, 182, 183, 184 are inserted into the holes of the terminal plate 186, and the coil bobbins 185, 188 and the terminal plate 186 are fitted. The magnetic core 147 is inserted into the coil bobbins 185 and 188.

Therefore, the same effect as that of the fifteenth embodiment can be obtained. (Embodiment 19) A nineteenth embodiment of the present invention will be described with reference to FIGS. FIG. 41 is an exploded perspective view, and FIG. 42 is a perspective view of a completed product. According to FIG.
Reference numerals 1, 192, 193, and 194 denote a first coil, a second coil, a third coil, and a fourth coil, each of which has a rectangular wire wound edgewise, and 147 forms a square-shaped closed magnetic path. A U-shaped magnetic core 195 is the coil 19
1, 192, 193, 194, a flange portion 195a for insulating the flange portion 195a, a cylindrical outer cylinder portion 195b provided on the outer periphery of the flange portion 195a, and a row of vertical portions provided on a part of the outer cylinder portion 195b. Insulating wall 195c for insulating between installed coils
Insulators 196 are made of the coils 191 and 193, respectively.
And the magnetic cores 147 and the coils 192 and 194
And a coil bobbin including an insulating plate 196a for insulating between the magnetic cores 147 and two cylindrical portions 196b. Here, the first coil 191 and the third coil 193, and the second coil 192 and the fourth coil 194 are continuously wound around the respective lead portions. Each of the coils has the insulator 195 interposed therebetween, the coil bobbin 196 is inserted therein, and the magnetic core 147 is incorporated in the coil bobbin 196.

Therefore, in addition to the same effects as in the fourteenth embodiment, since the two coils are wound continuously, there is no connection by welding or the like, so that the increase in the DC resistance due to the contact resistance at the connection portion is eliminated, and the temperature during energization The rise can be reduced, and the size of the common mode choke coil can be reduced. Further, since a connecting step is not required, cost reduction, man-hour reduction and quality stabilization can be achieved, and further, as two coils are formed as one part, assembly becomes easy. Also, when the rectangular copper wire is coated, the safety can be improved because the live part is not exposed at the connection part.

(Embodiment 20) A twentieth embodiment of the present invention will be described with reference to FIGS. FIG.
3 is an exploded perspective view, and FIG. 44 is a perspective view of a completed product. According to the drawing, reference numerals 201, 202, 203, and 204 denote a first coil, a second coil, a third coil, and a fourth coil, each of which has a rectangular wire wound edgewise, and 147 denotes a square-shaped closed magnetic field. A U-shaped magnetic core forming a path, 148 is a magnetic leg of the magnetic core 147, and 149 is a magnetic leg 14 of the magnetic core 147.
8, the connection portion 205 is the above-mentioned coils 201, 202, 2
03, 204 and the first coil 201, fourth
Two cylindrical portions 205a that insulate between the coil 204 and the magnetic leg 148 of the one magnetic core 147;
a collar portion 205b provided at one end of the
The coil bobbin 206 comprising an outer cylindrical portion 205c formed in a cylindrical shape on the outer periphery of the outer cylindrical portion b and an insulating wall 205d provided in a part of the outer cylindrical portion 205c and arranged in a vertical direction to insulate between the coils, 206 1st coil 201, 4th coil 2
An insulating plate provided with two holes for passing a magnetic core 147 that insulates between the connection part 149 of the magnetic core 04 and the one magnetic core 147. The insulating plate 208 is provided between the second coil 202 and the third coil 203 and the other magnetic core 147. This is a coil bobbin including an insulating plate 208a to be insulated and two cylindrical portions 208b. Here the first
Coil 201, third coil 203, second coil 2
02 and the fourth coil 204 are continuously wound at the respective lead portions. Each of the coils has the coil bobbin 205 interposed therebetween, the insulating plate 206 and the coil bobbin 208 inserted and fitted, and the magnetic core 147 is incorporated in the coil bobbins 205 and 208 and the insulating plate 206.

Therefore, the same effect as that of the nineteenth embodiment can be obtained. (Embodiment 21) A twenty-first embodiment of the present invention will be described with reference to FIGS. FIG. 45 is an exploded perspective view, and FIG. 46 is a perspective view of a completed product. According to FIG.
Reference numerals 1, 212, 213, 214 denote a first coil, a second coil, a third coil, and a fourth coil, each of which has a rectangular wire wound edgewise, and 147 forms a square-shaped closed magnetic path. A U-shaped magnetic core, 148 is a magnetic leg of the magnetic core 147, 149 is a connection portion of the magnetic leg 148 of the magnetic core 147,
215 denotes each of the coils 211, 212, 213, 214
Insulation between the first coil 211 and the fourth coil 21
2 to insulate between the magnetic legs 148 of the magnetic core 147 and the one magnetic core 147.
A cylindrical portion 215a, a flange portion 215b provided at one end of the cylindrical portion 215a, an outer cylindrical portion 215c provided on an outer periphery of the flange portion 215b, and a vertically provided portion of the outer cylindrical portion 215c. Insulating wall 2 for insulating between adjacent coils
The coil bobbin 216 made of 15 d insulates between the first coil 211, the fourth coil 214 and the connecting portion 149 of the connecting portion 148 of the magnetic core 147, and
A terminal plate provided with a side plate 216b provided with two cuts 216a at one end and having a hole for fixing the position through the lead-out portions of 1, 212, 213 and 214 is provided with the second coil 212 and the third coil 213. And the other magnetic core 14
An insulating plate 218a and two cylindrical portions 218b for insulating between
And a coil bobbin. Here, the first coil 21
The first and third coils 213 and the second and fourth coils 212 and 214 are continuously wound at the respective lead portions. The first coil 211 and the second coil 214 are inserted into the coil bobbin 215, and the coils 211 and 214 are rotated to position the second coil 212 and the third coil 213 on the coil bobbin 215. And insert each coil 211,
The lead portions of 212, 213, 214 are passed through the holes of the terminal plate 216, and the coil bobbins 215, 218 and the terminal plate 216 are fitted to each other.
And the terminal board 216.

Therefore, in addition to the same effects as in the nineteenth embodiment, the lead pitch of each coil is fixed by the hole of the terminal plate 216, so that the pin pitch and position can be determined accurately.

[0079]

As described above, the common mode choke coil according to the present invention comprises a first coil, a second coil, a third coil and a fourth coil each having a rectangular wire wound edgewise, and And a first coil and a second coil on one magnetic leg of the magnetic core, and a third coil and a fourth coil on the other opposing magnetic leg, respectively. The first coil and the third coil, the second coil and the fourth coil are connected in series, respectively, and the first coil and the second coil, the second coil and the second coil are connected by a line current. The magnetic flux generated in the coil and the third coil, the magnetic flux generated in the third coil and the fourth coil, and the magnetic flux generated in the fourth coil and the first coil cancel each other, and the first coil, the third coil, and the second coil are cancelled. And the magnetic flux generated in the fourth coil is Urges Re respectively, said first coil by the current further flows in the same direction, the second coil,
The magnetic fluxes generated in the third coil and the fourth coil are wound so as to urge each other, and the first coil and the third
, The second coil and the fourth coil are arranged on the magnetic legs so as to intersect each other, and furthermore, the flat coil is wound edgewise so that the first coil, the second coil and the The distance between the centers of the third coil and the fourth coil can be reduced, and the magnetic coupling between the coils can be greatly improved.

Further, since the magnetic coupling is high and the leakage flux is small, even when the cross-sectional area of the magnetic core is small, normal mode magnetic saturation hardly occurs and a large line current can be passed.

Further, it is possible to use a high permeability magnetic core having a relatively low saturation magnetic flux density, and it is possible to make the magnetic core thin while securing inductance.

Further, since the wire length of the coil wound around the magnetic core is shortened and the temperature rise during energization can be reduced even when the cross-sectional area of the rectangular wire is reduced, the volume ratio can be reduced by about 50%.

Further, since the coil is wound so that the winding start and the winding end are separated from each other, the stray capacitance between the winding start and the winding end is reduced, and the impedance characteristic in a high frequency region is improved.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a common mode choke coil according to an embodiment of the present invention.

FIG. 2 is a perspective view of a completed product according to the embodiment.

FIG. 3 is a connection diagram of the embodiment.

FIG. 4 is a connection diagram of the embodiment.

FIG. 5 is a DC superimposition characteristic diagram comparing the embodiment and a conventional product.

FIG. 6 is a frequency characteristic diagram of impedance characteristics comparing the embodiment and a conventional product.

FIG. 7 is an exploded perspective view of the other embodiment.

FIG. 8 is a perspective view of a finished product according to another embodiment.

FIG. 9 is a connection diagram of another embodiment.

FIG. 10 is a connection diagram of another embodiment.

FIG. 11 is an exploded perspective view of another embodiment.

FIG. 12 is a perspective view of a finished product according to another embodiment.

FIG. 13 is an exploded perspective view of the other embodiment.

FIG. 14 is a perspective view of a finished product according to another embodiment.

FIG. 15 is a perspective view of a finished product according to another embodiment.

FIG. 16 is an exploded perspective view of the other embodiment.

FIG. 17 is a perspective view of a finished product according to another embodiment.

FIG. 18 is an exploded perspective view of the other embodiment.

FIG. 19 is a perspective view of a completed product according to another embodiment.

FIG. 20 is a plan view showing a pattern of a printed circuit board according to another embodiment.

FIG. 21 is an exploded perspective view of the other embodiment.

FIG. 22 is a perspective view of a completed product according to another embodiment.

FIG. 23 is an exploded perspective view of the other embodiment.

FIG. 24 is a perspective view of a finished product according to another embodiment.

FIG. 25 is an exploded perspective view of another embodiment.

FIG. 26 is a perspective view of a finished product according to another embodiment.

FIG. 27 is an exploded perspective view of another embodiment.

FIG. 28 is a perspective view of a completed product according to another embodiment.

FIG. 29 is a top view of a finished product according to another embodiment.

FIG. 30 is a top view of a finished product according to another embodiment.

FIG. 31 is an exploded perspective view of the other embodiment.

FIG. 32 is a perspective view of a finished product according to another embodiment.

FIG. 33 is an exploded perspective view of another embodiment.

FIG. 34 is a perspective view of a finished product according to another embodiment.

FIG. 35 is an exploded perspective view of the other embodiment.

FIG. 36 is a perspective view of a finished product according to another embodiment.

FIG. 37 is an exploded perspective view of another embodiment.

FIG. 38 is a perspective view of a finished product according to another embodiment.

FIG. 39 is an exploded perspective view of the other embodiment.

FIG. 40 is a perspective view of a finished product according to another embodiment.

FIG. 41 is an exploded perspective view of the other embodiment.

FIG. 42 is a perspective view of a finished product according to another embodiment.

FIG. 43 is an exploded perspective view of the other embodiment.

FIG. 44 is a perspective view of a completed product according to another embodiment.

FIG. 45 is an exploded perspective view of the other embodiment.

FIG. 46 is a perspective view of a finished product according to another embodiment.

FIG. 47 is an exploded perspective view of a conventional common mode choke coil.

FIG. 48 is a perspective view of a completed common mode choke coil.

FIG. 49 is a wiring diagram of the common mode choke coil.

FIG. 50 is a wiring diagram of the common mode choke coil.

[Explanation of symbols]

11, 21, 31, 41, 51, 61, 71, 81, 9
1,101,111,121,131,141,15
1,161,171,181,191,201,211
First coil 12, 22, 32, 42, 52, 62, 72, 82, 9
2,102,112,122,132,142,15
2,162,172,182,192,202,212
Second coil 13, 23, 33, 43, 53, 63, 73, 83, 9
3,103,113,123,133,143,15
3,163,173,183,193,203,213
Third coil 14, 24, 34, 44, 54, 64, 74, 84, 9
4,104,114,124,134,144,15
4,164,174,184,194,204,214
Fourth coil 17, 37, 47, 48, 57, 67, 77, 87, 9
7, 107, 117, 127, 147 Core 18, 19 Magnetic legs 20a Line current 20b Current in the same direction 58 Solder 68 Bus bar 78 Printed circuit board 145, 155, 166, 175, 178, 185, 1
88, 196, 205, 208, 215, 218 Coil bobbin 146, 176, 206 Insulating plate 156, 186, 216 Terminal plate 165, 195 Insulator

Claims (22)

[Claims] 1. A coil comprising a first coil, a second coil, a third coil, and a fourth coil in which a rectangular wire is wound edgewise, and a magnetic core forming a square-shaped closed magnetic path. The first and second coils are arranged on one of the magnetic legs of the magnetic core, and the third and fourth coils are arranged on the other magnetic leg, and the first and third coils and the second and the second coils are arranged on the other magnetic leg. Four coils are connected in series, and the magnetic fluxes generated in the first and second coils, the second and third coils, the third and fourth coils, and the fourth and first coils by the line current are canceled. , The magnetic flux generated in the first and third coils and the magnetic flux generated in the second and fourth coils are mutually energized, and the magnetic flux generated in the first, second, third, and fourth coils by the current flowing in the same direction. Is a common mode choke coil that changes the winding direction of each coil so that A common mode choke coil in which the first and fourth coils and the second and third coils are arranged side by side. 2. The common mode choke coil according to claim 1, wherein the magnetic core forming the square-shaped closed magnetic circuit is formed as an integral body without a butted portion. 3. The common mode choke coil according to claim 1, wherein a U-shaped magnetic core is abutted as the magnetic core of the square-shaped closed magnetic circuit. 4. A U-shaped closed core having a U-shaped magnetic core and an I-shaped magnetic core butted together.
The common mode choke coil according to the item. 5. The common mode choke coil according to claim 1, wherein each of the first, second, third, and fourth coils is independent. 6. The common mode choke coil according to claim 5, wherein each of the first to fourth independent coils has a terminal portion at one end and a connection portion at the other end. 7. When the respective connection portions of the first and third coils and the second and fourth coils are mounted on a magnetic core, one of them is located on one side of the core and the other is located on the other side. The common mode choke coil according to claim 5, which is provided and connected as described above. 8. A connecting portion of one of the first and third coils and a connecting portion of the second and fourth coils, each of which has a protruding portion protruding toward the connecting portion of the other coil. The common mode choke coil according to claim 7 provided. 9. The common mode choke coil according to claim 5, wherein the connection portions of the first and third coils and the second and fourth coils are connected by ultrasonic welding or soldering. 10. The connection part of the first to fourth coils is all protruded to one side, and the connection part is connected to the first and third coils and the second and fourth coils via a bus bar. 6. The common mode choke coil according to 5. 11. The first and third coils and the second and fourth coils are connected by mounting all of the connection portions of the first to fourth coils to the other side and mounting them on a printed circuit board. Common mode choke coil. 12. The first and third coils and the second and fourth coils.
2. The common mode choke coil according to claim 1, wherein said coil is constituted by a continuous rectangular wire. 13. A continuous part of the first and third coils,
13. The common mode choke coil according to claim 12, wherein, when one of the continuous portion of the coil and the fourth coil is mounted on the magnetic core, the core is positioned on one side of the core and the other is positioned on the other side. 14. The common mode choke coil according to claim 13, wherein a bent portion is provided so as to be bent back to a continuous portion of the first and third coils and a continuous portion of the second and fourth coils. 15. The common mode choke coil according to claim 13, wherein the continuous portion of the first and third coils and the continuous portion of the second and fourth coils are provided with a bent portion which is folded back in two stages. 16. The common mode choke coil according to claim 1, wherein each of the coils mounted on the magnetic core and the magnetic core are insulated by an insulator. 17. The common mode choke coil according to claim 16, wherein the insulator is a coil bobbin and an insulating plate. 18. The common mode choke coil according to claim 16, wherein the insulator is a terminal board provided with a coil bobbin and an insulating plate. 19. The common mode choke coil according to claim 16, wherein the insulator is formed by integrating a coil bobbin with one of the insulating plates. 20. The common mode choke coil according to claim 1, wherein an insulator is provided at a portion adjacent to each coil mounted on the magnetic core. 21. The common mode choke coil according to claim 20, wherein the common mode choke coil has a shape such that an insulator that insulates between the coils covers an outer peripheral portion between adjacent coils. 22. The common mode choke coil according to claim 20, wherein an insulator for insulating the coils is provided integrally with the coil bobbin.