TW201837934A - Coupled inductor - Google Patents

Abstract

To provide a coupled inductor in which a first conductor and a second conductor are formed of electrically conductive metal plates intersecting each other, and with which total current path lengths can be made the same dimensions. A first conductor 10 and a second conductor 20 are accommodated in a magnetic core. The first conductor 10 and the second conductor 20 are formed of electrically conductive metal plates. The first conductor 10 and the second conductor 20 intersect each other in central intersecting paths 11, 21, and are shaped to be vertically spaced apart from each other. The first conductor 10 and the second conductor 20 have equal total current path length dimensions, and have equal direct-current resistances.

Description

Coupled inductor

The present invention relates to a coupled inductor in which two conductors are interdigitated in a magnetic core.

Patent Document 1 and Patent Document 2 describe a coupled inductor in which two conductors are housed in a cross between magnetic cores. The coupled inductor described in FIG. 2 of Patent Document 1 is a gap formed by abutting a pair of magnetic cores, and two wires are disposed so that the center portion intersects. The coupled inductor described in FIGS. 36 to 39 of Patent Document 2 has a magnetic core formed with a passage extending from the first side surface to the second side surface, and two windings are housed inside the passage. The two windings are wound around the core so that the insides of the passages cross each other. Both ends of each winding extend to the bottom surface of the magnetic core to form a lead plate. The two windings are insulated at the intersection by an insulator such as an insulating tape or varnish. [Prior Art Document] [Patent Document 1] Japanese Patent Laid-Open Publication No. Hei. No. 2007-184509 (Patent Document 2) Japanese Patent Laid-Open Publication No. 2013-528321

[Problems to be Solved by the Invention] In the coupled inductor described in Patent Document 1, the end portions of the two wires intersect in the gap of the magnetic core, and the end portions of the respective wires extend linearly toward the outside of the magnetic core. Go out. Further, since the two wires overlap each other only vertically, the end portions of the two wires are on the outer side of the magnetic core, and the height positions in the vertical direction are different. Therefore, when the coupled inductor is mounted on a substrate or the like, it is difficult to connect the end portions of the respective wires to the conductor portions of the wiring board or the like, and the step of soldering together with the wafer components using a so-called reflow step cannot be employed. In the coupled inductor described in Patent Document 2, in the path of the magnetic core, the two windings intersect with each other in a strip-like manner, and the lead plates at both end portions of the two windings are located on the common bottom surface of the magnetic core. Therefore, the total length of the current path between the lead plate and the lead plate is different between the winding on the lower side of the intersection and the winding superimposed on the upper side. If the lengths of the current paths are different in the two wires and the DC resistance values are different, the current will be deviated between the different phases, and the magnetic flux in the core will also be deviated. As a result, the magnetic permeability and the inductance change during the operation, and the chopping current width increases, resulting in a decrease in coupling efficiency. The present invention has been made in view of the above problems, and an object of the present invention is to provide a coupled inductor which can reduce the difference in total length of each current path even if the conductor is crossed in the magnetic core. Make the total length equal. [Means for Solving the Problems] The present invention is a coupled inductor in which a first conductor and a second conductor are provided in a state in which a magnetic core is insulated from each other, and the first conductor and the second conductor are provided. Each extending in a direction intersecting a coil axis (O) set to the magnetic core, wherein the first conductor and the second conductor intersect at an intersection, and the first length is within a range including a specific length of the intersection Each of the conductor and the second conductor is in a shape separated from each other. Further, it is preferable that the first conductor and the second conductor are disposed in a direction orthogonal to the coil axis (O) except for a range including a specific length of the intersection portion. The coupled inductor of the present invention has a virtual reference line (Ov) perpendicular to the coil axis (O) and extending in a direction in which the first conductor and the second conductor overlap, and the coil axis (O) An imaginary line extending in a direction orthogonal to the vertical reference line (Ov) is a horizontal reference line (Oh), and the first conductor and the second conductor are projected onto the vertical reference line (Ov) and the level When the two sides of the reference line (Oh) are parallel to each other, the first conductor and the second conductor are oriented toward the vertical reference line around the horizontal reference line (Oh) within a specific length including the intersection portion. (Ov) is a line symmetrical shape. Further, the coupled inductor of the present invention has a virtual reference line (Ov) perpendicular to the coil axis (O) and extending in a direction in which the first conductor and the second conductor overlap, and the coil axis ( An imaginary line extending in a direction orthogonal to both of the vertical reference line (Ov) is a horizontal reference line (Oh), and the first conductor and the second conductor are projected onto the coil axis (O) and When the two horizontal reference lines (Oh) are parallel to each other, the first conductor and the second conductor are oriented toward the coil axis with the horizontal reference line (Oh) as a center within a specific length including the intersection portion. (O) is a line symmetrical shape. In this case, it is preferable that the entire first conductor and the second conductor have a line symmetry toward the coil axis (O) centering on the horizontal reference line (Oh). Preferably, the coupled inductor of the present invention has substantially the same total length dimension of the first conductor and the second conductor. In the coupled inductor of the present invention, each of the first conductor and the second conductor may be formed integrally with a cross section forming the intersection and extending in a direction surrounding the coil axis (O) The surrounding road and the terminal portion provided in the front portion of each of the surrounding roads. In this case, it is preferable that the two terminal portions provided in the first conductor and the four terminal portions provided in the two terminal portions of the second conductor are located in the same plane. Preferably, the coupled inductor of the present invention is provided with a holding member that maintains insulation of the first conductor and the second conductor in a range including a specific length of the intersection portion in the magnetic core body. Further, in the coupled inductor of the present invention, it is preferable that the first conductor and the second conductive system are formed by bending a conductive metal plate. [Effects of the Invention] In the coupled inductor of the present invention, since the first conductor and the second conductor are separated from each other at the intersection of the wires inside the magnetic core body, the current paths of the two wires can be eliminated. The difference in total length can also reduce the difference in DC resistance, and it is preferable to make the DC resistance uniform. As a result, it is possible to suppress the fluctuation of the magnetic permeability and the inductance during the operation, and to reduce the width of the chopping current, thereby improving the coupling efficiency. Further, when the first conductor and the second conductive system are formed by bending a conductive metal plate, the amount of current flowing through the first conductor and the second conductor can be increased, and the conductors can be maintained at the intersection portion. For shapes that do not meet each other.

In each of the drawings described below, the X1-X2 direction is the lateral direction, the Y1-Y2 direction is the longitudinal direction, and the Z1-Z2 direction is the up-and-down direction. The coupled inductor 1 according to the first embodiment of the present invention shown in FIG. 1 and FIG. 2 has a base 2 and a first magnetic core 3 and a second magnetic core 4 fixed to the upper surface of the Z1 side. The base 2 is formed of an insulating material such as a synthetic resin material. On the lower surface of the base 2 facing the Z2 direction, a total of four places on the Y1 side and two places on the Y2 side are formed, and a support recess 2a for supporting the terminal portion is formed. The first magnetic core 3 and the second magnetic core 4 are processed by a magnetic material such as Ni-Zn ferrite. Alternatively, it may be formed by using a Fe-based amorphous magnetic alloy powder, a FeSiCr-based crystalline magnetic alloy powder, or a metal magnetic powder. The first magnetic core body 3 is formed with a concave portion 3b continuous in the longitudinal direction (Y1-Y2 direction) at a central portion of the joint surface 3a facing the X2 direction. The joint surface 4a of the second magnetic core 4 facing the X1 direction is a flat surface. The joint surface 3a of the first magnetic core 3 and the joint surface 4a of the second magnetic core 4 are fixed to each other to form a joint core having a storage space formed by the recess 3b therein. One of the lower holding member 30 and the upper holding member 40 is held in the housing space formed by the recess 3b, and one of the first conductor 10 and one of the second conductor 20 are held by the lower holding member 30 and the upper holding member 40. The first conductor 10 and the second conductor 20 are formed of a conductive metal plate. The conductive metal plate is, for example, an alloy plate containing Cu, and is a Carson alloy plate or the like. The first conductor 10 and the second conductor 20 are bent and processed, and have rigidity to maintain their shape after bending. In FIGS. 3 to 5, the coil axis O extending in the X1-X2 direction is set as an imaginary line. Each of the first conductor 10 and the second conductor 20 is disposed in a direction crossing the coil axis O. The first conductor 10 and the second conductor 20 are formed so as to surround the coil axis O, and each of the first conductor 10 and the second conductor 20 is a coil conductor that is less than one turn. The first conductor 10 and the second conductor 20 are oriented in the Z1-Z2 direction in the plate width direction, and the plate thickness direction faces the X1-X2 direction and the Y1-Y2 direction. As shown in the plan view of FIG. 5, the first conductor 10 and the second conductor 20 intersect each other at the central portion thereof. As shown in FIGS. 3 to 5, the intermediate portion between the first conductor 10 and the second conductor 20 in the Z1-Z2 direction of the portion where the first conductor 10 and the second conductor 20 intersect is the intersection portion C. 4 and 5, there are shown a vertical reference line Ov and a horizontal reference line Oh. The vertical reference line Ov is an imaginary line extending perpendicularly from the coil axis O and passing through the center of the intersection C in the direction in which the conductors 10 and 20 overlap, that is, in the Z1-Z2 direction. The horizontal reference line Oh is an imaginary line extending in a direction orthogonal to both the coil axis O and the vertical reference line Ov and extending in the Y1-Y2 direction by the intersection C. As shown in FIGS. 3 to 5, the range L1 of the specific length in the longitudinal direction (Y1-Y2 direction) centering on the intersection portion C is the central intersection 11 of the first conductor 10 and the central intersection 21 of the second conductor 20. In the first conductor 10, lateral intersections 12a and 12b having a specific length range L2 are formed on both sides in the longitudinal direction (Y1-Y2 direction) of the central intersection 11, and the second conductor 20 is also at the central intersection 21 Side intersections 22a and 22b of a specific length range L2 are formed on both sides in the longitudinal direction (Y1-Y2 direction). As shown in FIG. 5, the side intersection 12a and the side intersection 22a extend in parallel in the longitudinal direction (Y1-Y2 direction), and the side intersection 12b and the side intersection 22b are also in the longitudinal direction (Y1-Y2 direction). Extending parallel to each other. In other words, the first conductor 10 and the second conductor 20 are disposed in a direction orthogonal to the core axis O except for the central intersecting passages 11 and 21 which are the specific lengths of the intersection portion C. The first conductor 10 forms a "crossroad" by the central intersection 11 and the side intersections 12a and 12b extending in a specific length range in the longitudinal direction around the intersection C, and the second conductor 20 is used as the intersection C. The central intersection 21 and the lateral intersections 22a and 22b extending in a specific length range in the longitudinal direction for the center form a "crossroad". In the first conductor 10, the surrounding portion 13a is bent from the end portion on the Y1 side of the side intersecting passage 12a, and the surrounding portion 13b is bent from the end portion on the Y2 side of the side intersecting passage 12b. Further, the terminal portion 14a is bent at the end portion on the Z2 side of the surrounding road 13a, and the terminal portion 14b is bent at the end portion on the Z2 side of the surrounding passage 13b. In the second conductor 20, the surrounding portion 23a is also bent from the end portion on the Y1 side of the side intersection 22a, and the surrounding portion 23b is bent from the end portion on the Y2 side of the side intersecting path 22b. Further, the terminal portion 24a is bent at the end portion on the Z2 side of the surrounding passage 23a, and the terminal portion 24b is bent at the end portion on the Z2 side of the surrounding passage 23b. As described above, the first conductor 10 and the second conductor 20 are bent so as to surround the coil axis O, and each of the first conductor 10 and the second conductor 20 is a coil conductor that is less than one turn. As shown in FIG. 4, in the first conductor 10, one of the central intersecting passage 11 and the side intersecting passages 12a and 12b has a protruding shape in the downward direction (Z2 direction) so as to be away from the horizontal reference line Oh, and the second conductor 20 is formed in the second conductor 20. One of the central intersection 21 and the side intersections 22a and 22b has a convex shape in the upward direction (Z1 direction) so as to be away from the horizontal reference line Oh. In other words, the first conductor 10 and the second conductor 20 have a shape that is separated from each other in a range of a specific length in the longitudinal direction (Y1 - Y2) around the intersection portion C. When the first conductor 10 and the second conductor 20 are projected onto a plane parallel to both the vertical reference line Ov and the horizontal reference line Oh, the first conductor 10 and the second conductor 20 are longitudinally centered on the intersection C ( In the range of the specific length of Y1-Y2), the line is symmetrical with respect to the vertical reference line Ov centering on the horizontal reference line Oh. As shown in FIG. 5, in the planar shape in which the first conductor 10 and the second conductor 20 are projected onto a plane parallel to both the coil axis O and the horizontal reference line Oh, the first conductor 10 includes the central intersection 11 and The "crossroads" of the side intersections 12a and 12b and the "crossroads" of the second conductor 20 including the center intersection 21 and the side intersections 22a and 22b are oriented toward the coil axis O centering on the horizontal reference line Oh. Symmetrical shape. Further, the overall shape of the first conductor 10 and the overall shape of the second conductor 20 are also line-symmetrical with respect to the coil axis O centering on the horizontal reference line Oh. As a result, the total length dimension of the current path of the terminal portion 14a to the terminal portion 14b of the first conductor 10 substantially coincides with the total length dimension of the current path of the terminal portion 24a to the terminal portion 24b of the second conductor 20, and preferably coincides with each other. Thereby, the DC resistances of the first conductor 10 and the second conductor 20 are substantially equal. The lower holding member 30 and the upper holding member 40 are formed of an insulating material such as synthetic resin. As shown in FIG. 3, the lower holding member 30 has a holding body portion 30a. The holding body portion 30a extends in the longitudinal direction (Y1-Y2 direction), and the outer wall portion has a square tubular shape. The holding body portion 30a has an intersecting holding groove 31 that opens in the Z1 direction. The side holding grooves 32a and 32b which are separated into two and open in the Z1 direction are formed on the Y1 side of the intersecting holding groove 31, and are formed on the Y2 side of the intersecting holding groove 31, and are formed to be separated into two. The grooves 32a and 33a are held on the sides in the Z1 direction. Further, a flange portion 34a is formed at an end portion on the Y1 side of the holding body portion 30a, and a flange portion 34b is formed at an end portion on the Y2 side. The upper holding member 40 has a holding body portion 40a and flange portions 44a, 44b integrally formed at both end portions thereof. The holding body portion 40a extends in the longitudinal direction (Y1-Y2 direction), and the outer wall portion has a rectangular tube shape. The holding main body portion 40a is formed with an intersecting holding groove that is opened in the Z2 direction, and two side holding grooves are respectively separated on both sides thereof. The intersecting holding groove formed in the upper holding member 40 and the intersecting holding groove 31 and the side holding grooves 32a, 32b, 33a, and 33b of the lower holding member 30 are 180 degrees in the Y1-Y2 direction. Rotating symmetrical shape. That is, the lower holding member 30 and the upper holding member 40 are composed of the same member. The assembly method of the above-described coupled inductor 1 is as follows. As shown in FIG. 3, the first conductor 10 and the second conductor 20 are crossed, and the central intersection portion 11 of the first conductor 10 and the central intersection portion 21 of the second conductor 20 are fitted into the intersecting holding grooves 31 of the lower holding member 30. Further, the side intersection 12a of the first conductor 10 is fitted into the side holding groove 32a, the side intersection 12b is fitted into the side holding groove 32b, and the side intersection 22a of the second conductor 20 is embedded. The groove 33a is held to the side, and the side intersection 22b is fitted into the side holding groove 33b. Further, the central intersecting path 11 and the side intersecting paths 12a and 12b of the first conductor 10 and the central intersecting path 21 and the side intersecting paths 22a and 22b of the second conductor 20 are respectively fitted into the upper holding member 40 in the same manner. The cross retaining groove and the side retaining groove. As shown in FIG. 2, the first conductor 10 and the second conductor 20 are combined, and the lower holding member 30 and the upper holding member 40 are held by the main body portion 30a while being held by the lower holding member 30 and the upper holding member 40. 40a is inserted into the concave portion 3b of the first magnetic core 3, and the first magnetic core 3 and the second magnetic core 4 are combined, and further, the lower side of the first magnetic core 3 and the second magnetic core 4 Combine the base 2. The first magnetic core body 3 and the second magnetic core body 4 are connected to each other, and the surface of the first magnetic core body 3 and the second magnetic core body 4 facing the Z2 direction is followed by the base 2 . As a result, as shown in FIG. 1 , the base 2 is combined with the first magnetic core 3 and the second magnetic core 4 on the outer surface of the Y1 side of the first magnetic core 3 and the second magnetic core 4 . The flange portion 34a of the lower holding member 30 and the flange portion 44a of the upper holding member 40 are provided, and the flange of the lower holding member 30 is provided on the outer surface of the Y2 side of the first magnetic core 3 and the second magnetic core 4 The portion 34b and the flange portion 44b of the upper holding member 40. The surrounding passage 13a of the first conductor 10 and the surrounding passage 23a of the second conductor 20 are provided on the outer surfaces of the flange portions 34a and 44a, and the terminal portions 14a and 24a are provided on the Y1 side support recess of the lower surface of the base 2. 2a. The surrounding path 13b of the first conductor 10 and the surrounding path 23b of the second conductor 20 are provided on the outer surfaces of the flange portions 34b and 44b, and the terminal portions 14b and 24b are provided on the Y2 side supporting recess of the lower surface of the base 2. 2a. As a result, the four terminal portions 14a, 14b, 24a, and 24b are located in the same plane on the lower surface of the base 2. Next, the characteristics of the circuit of the above-described coupled inductor 1 will be described. Fig. 10(A) shows a coupled inductor 1A as a comparative example, and Fig. 10(B) shows a circuit diagram of the coupled inductor 1 of the first embodiment. In the coupled inductor 1A of the comparative example shown in FIG. 10(A), the first conductor 10A and the second conductor 20A are wound around the magnetic cores 3 and 4 by less than one turn. In FIG. 10A, the terminal portion 14a which is the winding start end of the first conductor 10A and the terminal portion 24a which is the winding start end of the second conductor 20A are both located on the Xa side, and become the winding terminal terminal portion 14b and the winding end. The terminal portions 24b are all located on the Xb side. Therefore, in order to reverse the winding start ends of the label (·) on the primary side and the secondary side as shown in Fig. 10(B), it is necessary to adopt a circuit board on which the coupled inductor 1A is mounted. Countermeasures such as wiring crossing. On the other hand, in the coupled inductor 1 according to the first embodiment of the present invention, the first conductor 10 and the second conductor 20 intersect at the intersection C in the magnetic cores 3 and 4, and therefore, for example, The terminal portion 14a at the winding start end of the first conductor 10 and the terminal portion 24b which is the winding end of the second conductor 20 are disposed on the same X1 side, and the terminal portion 14b which is the winding end of the first conductor 10 becomes the first The terminal portion 24a of the winding start end of the conductor 20 is disposed on the same X2 side, and it is not necessary to take measures such as crossing the wiring on the circuit. In the coupled inductor 1 according to the first embodiment of the present invention, since the first conductor 10 and the second conductive system are formed of a conductive metal plate, the current capacity can be increased on the primary side and the secondary side. As shown in FIG. 4, in the coupled inductor 1, since the first conductor 10 and the second conductor 20 are vertically separated from each other at the intersection portion C, the gap between the terminal portions 14a and 14b of the first conductor 10 can be reduced. The difference between the total length dimension of the current path and the total length dimension of the current path between the terminal portions 24a, 24b of the second conductor 20 can also make the total length of the current path coincide with each other. As a result, the direct current resistances of the two conductors can be made uniform, and variations in magnetic permeability and inductance during operation can be suppressed, and the chopping current width can be reduced, whereby the coupling efficiency can be improved. Moreover, since the first conductor 10 and the second conductor 20 formed of a metal plate are held by the lower holding member 30 and the upper holding member 40 shown in FIG. 3, the first conductor 10 and the second conductor 20 can be prevented from being used. The intersection C and the like are maintained in a manner of being connected. Moreover, since the lower holding member 30 and the upper holding member 40 are housed in the magnetic core bodies 3 and 4, the conductors 10 and 20 can be reliably insulated from the magnetic core bodies 3 and 4. Hereinafter, the structure of the first conductor 10 and the second conductor 20 used in the coupled inductor according to another embodiment of the present invention will be described. In the following, portions having the same functions as those in the first embodiment will be described with the same reference numerals. In the coupled inductor 101 according to the second embodiment of the present invention shown in FIG. 6, a concave portion 11a that is open upward is formed in the central intersection 11 of the first conductor 10, and a central intersection 21 of the second conductor 20 is formed. A recess 21a that is open downward is formed. The concave portion 11a and the concave portion 21a are opposed to each other without being in contact with each other to form an intersection portion. In the coupled inductor 101, the first conductor 10 and the second conductor 20 are symmetrical in a range including a specific length of the intersection, and the total length of the current path in the first conductor 10 and the second conductor 20 The dimensions are the same. In the coupled inductor 201 according to the third embodiment of the present invention shown in FIG. 7, the central intersection 11 of the first conductor 10 has a curved shape facing downward, and the central intersection 21 of the second conductor 20 is upward. The curved shape of the ridge. In the coupled inductor 201, the first conductor 10 and the second conductor 20 are symmetrical in a range including a specific length of the intersection, and the total length of the current path in the first conductor 10 and the second conductor 20 The dimensions are the same. In the coupled inductors 1, 101, and 201 of the first embodiment to the third embodiment, the plate width directions of the conductive metal plates constituting the first conductor 10 and the second conductor 20 are all oriented in the Z1-Z2 direction. On the other hand, in the coupled inductor 301 of the fourth embodiment shown in FIG. 8 and the coupled inductor 401 of the fifth embodiment shown in FIG. 9, the thickness direction of the first conductor 10 and the second conductor 20 is oriented. Z1-Z2 direction. In the coupled inductor 301 shown in FIG. 8, the central crossroad 11 and the central crossroad 21 are bent in a folded state so as to be separated from each other in the vertical direction. In the coupled inductor 401 shown in FIG. 9, the central crossroad 11 The central cross section 21 is curved into a curved shape so as to be separated from each other in the vertical direction. In the coupled inductors 301 and 401, the first conductor 10 and the second conductor 20 are symmetrical in a range including a specific length of the intersection, and the current path is in the first conductor 10 and the second conductor 20. The total length is the same size.

1‧‧‧Coupled inductor

1A‧‧‧coupled inductor

2‧‧‧Abutment

2a‧‧‧Support recess

3‧‧‧1st magnetic core

3a‧‧‧ joint surface

3b‧‧‧ recess

4‧‧‧2nd magnetic core

4a‧‧‧ joint surface

10‧‧‧1st conductor

10A‧‧‧1st conductor

11‧‧‧Central Crossroads

11a‧‧‧ recess

12a‧‧‧Side crossroads

12b‧‧‧lateral crossroads

13a‧‧‧ Surrounding road

13b‧‧‧ Surrounding road

14a‧‧‧Terminal Department

14b‧‧‧Terminal Department

20‧‧‧1st conductor

20A‧‧‧2nd conductor

21‧‧‧Central Crossroads

21a‧‧‧ recess

22a‧‧‧Side crossroads

22b‧‧‧Side crossroads

23a‧‧‧ Surrounding road

23b‧‧‧ Surrounding road

24a‧‧‧Terminal Department

24b‧‧‧Terminal Department

30‧‧‧ Lower holding member

30a‧‧‧Maintaining the body

31‧‧‧cross holding slot

32a‧‧‧side side retention slot

32b‧‧‧Side side retention slot

33a‧‧‧ side retaining slot

33b‧‧‧ side keeping slot

34a‧‧‧Flange

34b‧‧‧Flange

40‧‧‧ upper holding member

40a‧‧‧Main body

44a‧‧‧Flange

44b‧‧‧Flange

101‧‧‧coupled inductor

201‧‧‧coupled inductor

301‧‧‧Coupled Inductors

401‧‧‧coupled inductor

C‧‧‧Intersection

L ₁ ‧‧‧Scope

L ₂ ‧‧‧Scope

O‧‧‧ coil axis

Ov‧‧ vertical reference line

Oh‧‧‧ horizontal baseline

Fig. 1 is an external perspective view of a coupled inductor according to a first embodiment of the present invention. Fig. 2 is an exploded perspective view showing all of the components of the coupled inductor according to the first embodiment of the present invention. 3 is an exploded perspective view showing two conductors and a holding member of the coupled inductor according to the first embodiment of the present invention. Fig. 4 is a side view showing a combination of a first conductor and a second conductor of the coupled inductor according to the first embodiment of the present invention. Fig. 5 is a plan view showing a combination of a first conductor and a second conductor of the coupled inductor according to the first embodiment of the present invention. Fig. 6 is a perspective view showing a combination of a first conductor and a second conductor of the coupled inductor according to the second embodiment of the present invention. Fig. 7 is a perspective view showing a combination of a first conductor and a second conductor of a coupled inductor according to a third embodiment of the present invention. Fig. 8 is a perspective view showing a combination of a first conductor and a second conductor of a coupled inductor according to a fourth embodiment of the present invention. Fig. 9 is a perspective view showing a combination of a first conductor and a second conductor of a coupled inductor according to a fifth embodiment of the present invention. Fig. 10(A) is an explanatory view showing a comparative example of a coupled inductor, and Fig. 10(B) is a circuit diagram of a coupled inductor according to an embodiment.

Claims (10)

A coupled inductor in which a first conductor and a second conductor are insulated from each other inside a magnetic core body, wherein the first conductor and the second conductor are both set to be opposite to the magnetic core The coil axis (O) extends in a direction in which the first conductor and the second conductor intersect at an intersection, and each of the first conductor and the second conductor is within a range including a specific length of the intersection Shapes that are separated from each other. The coupled inductor according to claim 1, wherein the first conductor and the second conductor are disposed in a direction orthogonal to the coil axis (O) except for a range of a specific length of the intersection portion. The coupled inductor of claim 1, wherein the imaginary line extending perpendicular to the coil axis (O) and extending in a direction in which the first conductor and the second conductor overlap is a vertical reference line (Ov) for the coil An imaginary line extending in a direction orthogonal to both the axis (O) and the vertical reference line (Ov) is a horizontal reference line (Oh), and the first conductor and the second conductor are projected onto the vertical reference line (Ov) And when the two horizontal reference lines (Oh) are parallel to each other, the first conductor and the second conductor are oriented with the horizontal reference line (Oh) as a center within a range including a specific length of the intersection portion. The above vertical reference line (Ov) is a line symmetrical shape. The coupled inductor of claim 1, wherein the imaginary line extending perpendicular to the coil axis (O) and extending in a direction in which the first conductor and the second conductor overlap is a vertical reference line (Ov) for the coil An imaginary line extending in a direction orthogonal to both the axis (O) and the vertical reference line (Ov) is a horizontal reference line (Oh), and the first conductor and the second conductor are projected onto the coil axis (O) And when the two horizontal reference lines (Oh) are parallel to each other, the first conductor and the second conductor face the above-mentioned horizontal reference line (Oh) within a range of a specific length including the intersection portion The coil axis (O) is a line symmetrical shape. The coupled inductor according to claim 4, wherein the entirety of the first conductor and the second conductor is linearly symmetrical with respect to the coil axis (O) centering on the horizontal reference line (Oh). The coupled inductor of claim 1, wherein the first conductor and the second conductor have substantially the same total length dimension. The coupled inductor according to claim 1, wherein each of the first conductor and the second conductor is integrally formed with an intersection forming the intersection, and is surrounded by a pair extending in a direction surrounding the coil axis (O) The road and the terminal portion provided at the front portion of each of the surrounding roads. The coupled inductor according to claim 7, wherein the two terminal portions provided in the first conductor and the four terminal portions provided in the two terminal portions of the second conductor are located in the same plane. The coupled inductor according to claim 1, wherein the magnetic core body is provided with a holding member that maintains insulation of the first conductor and the second conductor in a range including a specific length of the intersection portion. The coupled inductor according to claim 1, wherein the first conductor and the second conductive system are formed by bending a conductive metal plate.