JP7031221B2 - Magnetic parts - Google Patents

Description

The present invention relates to magnetic components that can be used as reactors or transformers.

Conventionally, a winding is provided on an annular magnetic material to form a magnetic component such as a reactor or a transformer. However, in the conventional magnetic component, since the magnetic material is annular, there are problems that a dead space is generated and the heat dissipation performance is deteriorated.

In particular, the effect was remarkable in a power converter that requires a large current or magnetic flux. For example, as a power converter using a semiconductor element, a chopper type DC-DC converter using a reactor is known. Such a DC-DC converter mainly includes a power module including a semiconductor switching element, a capacitor, a reactor, and a circuit board on which these are mounted. These parts are individually configured independently and are fixed to a radiator, a case, or the like.

Patent Document 1 discloses a power converter (converter) in which a planar transformer and / or a planar inductor and a power switch are integrated. In this power converter, magnetic parts such as a transformer or a reactor are divided into a plurality of parts, each of which is made smaller and thinner. These parts are joined or secured to the case at intervals from each other.

Japanese Patent Publication No. 2008-502293

However, since the transformer used in the above-mentioned conventional power converter is formed by overlapping windings in the height direction, the height of the transformer becomes high and a dead space is surrounded around the transformer. The heat dissipation performance was also deteriorated.

Therefore, the present invention has been proposed in view of the above circumstances, and an object of the present invention is to provide a magnetic component capable of reducing dead space and improving heat dissipation performance.

In order to solve the above-mentioned problems, the magnetic component according to one aspect of the present invention is wound around four arm portions of a first magnetic body having an arm portion protruding from the center in all directions and a first magnetic body. It comprises four wound windings and a second magnetic body magnetically connected to the first magnetic body. Then, of the four windings, two windings linearly arranged on the arm portion are used as a set to form a first winding set and a second winding set, and the first winding set and the first winding set are formed. The magnetic flux generated from the second winding set orbits the second magnetic material.

According to the present invention, it is possible to reduce the dead space generated when the magnetic component is installed and improve the heat dissipation performance.

FIG. 1 is a top view showing the structure of a magnetic component according to the first embodiment of the present invention. FIG. 2A is a cross-sectional view showing the structure of the magnetic component according to the first embodiment of the present invention. FIG. 2B is a cross-sectional view showing the structure of the magnetic component according to the first embodiment of the present invention. FIG. 3A is a top view showing the structure of the first magnetic body of the magnetic component according to the first embodiment of the present invention. FIG. 3B is a top view showing the structure of the first magnetic body of the magnetic component according to the first embodiment of the present invention. FIG. 4 is a diagram for explaining the flow of magnetic flux by the magnetic component according to the first embodiment of the present invention. FIG. 5 is a top view showing the structure of the second magnetic body of the magnetic component according to the first embodiment of the present invention. FIG. 6 is a diagram for explaining the flow of magnetic flux circulating around the magnetic component according to the first embodiment of the present invention. FIG. 7 is a diagram for explaining the electrical connection of the winding wound around the magnetic component according to the first embodiment of the present invention. FIG. 8 is a diagram for explaining the electrical connection of the winding wound around the magnetic component according to the first embodiment of the present invention. FIG. 9 is a diagram for explaining the electrical connection of the winding wound around the magnetic component according to the first embodiment of the present invention. FIG. 10 is a diagram for explaining the electrical connection of the winding wound around the magnetic component according to the first embodiment of the present invention. FIG. 11 is a top view showing the structure of the magnetic component according to the second embodiment of the present invention. FIG. 12 is a diagram for explaining the flow of magnetic flux circulating around the magnetic component according to the second embodiment of the present invention. FIG. 13 is a top view showing the structure of the magnetic component according to the third embodiment of the present invention. FIG. 14 is a top view showing the structure of the magnetic component according to the third embodiment of the present invention. FIG. 15 is a top view showing the structure of the wiring board on which the magnetic components according to the third embodiment of the present invention are arranged. FIG. 16 is a top view showing a structure in which a magnetic component according to a third embodiment of the present invention is arranged on a wiring board. FIG. 17 is a diagram for explaining the effect of the magnetic component according to the third embodiment of the present invention. FIG. 18 is a diagram for explaining the effect of the magnetic component according to the third embodiment of the present invention. FIG. 19 is a top view showing the structure of the magnetic component according to the fourth embodiment of the present invention. FIG. 20 is a cross-sectional view showing the structure of the magnetic component according to the fourth embodiment of the present invention. FIG. 21 is a cross-sectional view showing the structure of the magnetic component according to the fourth embodiment of the present invention.

[First Embodiment]
Hereinafter, the first embodiment to which the present invention is applied will be described with reference to the drawings.

[Structure of magnetic parts]
FIG. 1 is a top view showing the structure of a magnetic component according to the present embodiment. As shown in FIG. 1, the magnetic component 1 according to the present embodiment includes a first magnetic body 3, four windings 5a, 5b, 5c, and 5d wound around the first magnetic body 3, and a first. It includes a magnetic body 3 of 1 and a second magnetic body 7 magnetically connected to each other. Further, a cross-sectional view taken along the line XX of FIG. 1 is shown in FIG. 2A.

The first magnetic body 3 has a cross-shaped shape as shown in FIG. 3A, and has rod-shaped arm portions 3a, 3b, 3c, and 3d protruding from the center in all directions. The tips of these arm portions 3a to 3d are magnetically connected to the inside of the second magnetic body 7. Further, as shown in FIG. 1, the first magnetic body 3 is arranged so as to have a cross shape with respect to the frame shape of the second magnetic body 7. Therefore, in the present embodiment, the tips of the arm portions 3a to 3d are connected to the midpoints of the four side surfaces of the frame-shaped second magnetic body 7.

As shown in FIG. 2B, the first magnetic material 3 may be formed so that the thickness of the magnetic material in the central portion is thicker than that of the arm portions 3a to 3d. Further, as shown in FIG. 3B, the width of the magnetic material at the center of the first magnetic material 3 may be formed to be wider than the width of the arm portions 3a to 3d. As a result, the cross-sectional area and volume of the magnetic material can be increased in the central portion of the first magnetic material 3 into which the magnetic flux flows, so that the magnetic flux density can be prevented from increasing. Further, by increasing the thickness or width of the central portion of the first magnetic body 3, the central portion of the first magnetic body 3 can function as a stopper when the windings 5a to 5d are arranged. .. Therefore, since the windings 5a to 5d can be easily arranged, the magnetic component 1 can be easily manufactured. However, as shown in FIG. 2B, the thickness of the central portion of the first magnetic body 3 should not exceed the thickness of the windings 5a to 5d. This makes it possible to prevent the overall height of the magnetic component 1 from increasing.

The four windings 5a, 5b, 5c, and 5d are wound around the four arm portions 3a, 3b, 3c, and 3d of the first magnetic body 3, respectively. Of the four windings 5a to 5d, two windings 5a and 5b linearly arranged on the arm portions 3a and 3b are electrically connected to form a set to form the first winding set 9A. .. Further, two windings 5c and 5d arranged linearly on the arm portions 3c and 3d are electrically connected to form a set to form a second winding set 9B.

As shown in FIG. 4, the first winding set 9A is wound so that the directions of the magnetic fluxes generated in the windings 5a and 5b by the current are both toward the center of the first magnetic body 3. However, the windings 5a and 5b may be wound so that the directions of the magnetic fluxes are both in the outer direction of the first magnetic body 3. In this embodiment, a case where the direction of the magnetic flux by the first winding set 9A is the center direction of the first magnetic body 3 will be described.

On the other hand, the second winding set 9B is wound so that the directions of the magnetic fluxes generated in the windings 5c and 5d by the current are both opposite to those of the first winding set 9A. Alternatively, the second winding set 9B is wound so as to output a positive voltage when a magnetic flux in the direction opposite to the magnetic flux generated in the first winding set 9A is generated. Therefore, in the present embodiment, as shown in FIG. 4, in the second winding set 9B, the directions of the magnetic fluxes generated in the windings 5c and 5d by the current are both in the outer direction of the first magnetic body 3. It is being wound. However, the direction may be opposite, and when the direction of the magnetic flux generated in the first winding set 9A is the outer direction of the first magnetic body 3, the direction of the magnetic flux generated in the second winding set 9B. Is toward the center of the first magnetic material 3.

In FIG. 4, the windings 5a to 5d are wound evenly from the center to the outside of the first magnetic body 3, respectively. However, since the distance between the adjacent windings increases from the center of the first magnetic body 3 to the outside, the number of windings of the windings 5a to 5d is set from the center of the first magnetic body 3. It may be wound so as to increase toward the outside. Thereby, the insulation distance between the windings 5a to 5d can be easily secured.

The second magnetic body 7 has a frame-shaped shape as shown in FIG. Then, as shown in FIG. 6, the magnetic flux generated from the first winding set 9A and the second winding set 9B orbits the second magnetic body 7.

Here, with reference to FIG. 6, the flow of the magnetic flux orbiting the magnetic component 1 will be described. As shown in FIG. 6, the magnetic flux generated from the windings 5a and 5b of the first winding set 9A flows to the center of the first magnetic body 3 and changes the direction by 90 degrees, while the winding 5c is on one side. It enters the arranged arm portion 3c, and the other enters the arranged arm portion 3d where the winding 5d is arranged. In the arm portions 3c and 3d, the magnetic flux generated from the windings 5a and 5b is combined with the magnetic flux generated by the windings 5c and 5d, and the combined magnetic flux flows to the second magnetic body 7. The combined magnetic flux entering the second magnetic body 7 is divided into left and right, orbits the second magnetic body 7, and flows to the position of the midpoint connected to the first magnetic body 3. At this position, the magnetic fluxes flowing from the left and right merge and enter the arm portions 3a and 3b where the windings 5a and 5b are arranged to make a full circle. In this way, the magnetic flux generated by the windings 5a to 5d orbits the first magnetic body 3 and the second magnetic body 7 in four loops, respectively.

As the magnetic flux generated by the windings 5a to 5d circulates in a loop in this way, the magnetic component 1 has an inductance component and can convert the current energy into magnetic energy.

Next, the electrical connection of each winding will be described with reference to FIGS. 7 to 10. First, FIGS. 7 and 8 show electrical connections when the magnetic component 1 according to the present embodiment is operated as a reactor.

As shown in FIGS. 7 and 8, if the first winding set 9A and the second winding set 9B are electrically connected, the magnetic component 1 can be operated as a reactor. In FIG. 7, the windings 5a and 5b constituting the first winding assembly 9A are connected in parallel, and the windings 5c and 5d constituting the second winding assembly 9B are also connected in parallel, so that the first winding assembly 9A is connected in parallel. The winding set 9A and the second winding set 9B are connected in series.

Further, in FIG. 8, the windings 5a and 5b constituting the first winding assembly 9A are connected in series, and the windings 5c and 5d constituting the second winding assembly 9B are also connected in series. The winding set 9A of 1 and the winding set 9B of the second are connected in parallel.

Next, FIGS. 9 and 10 show electrical connections when the magnetic component 1 according to the present embodiment is operated as a transformer.

As shown in FIGS. 9 and 10, if the first winding set 9A and the second winding set 9B are insulated, the magnetic component 1 can be operated as a transformer. In FIG. 9, the windings 5a and 5b constituting the first winding assembly 9A are connected in parallel, and the windings 5c and 5d constituting the second winding assembly 9B are also connected in parallel, so that the first winding assembly 9A is connected in parallel. The winding set 9A and the second winding set 9B are insulated. Further, in FIG. 10, the windings 5a and 5b constituting the first winding assembly 9A are connected in series, and the windings 5c and 5d constituting the second winding assembly 9B are also connected in series. The winding set 9A of 1 and the winding set 9B of the second are insulated.

[Effect of the first embodiment]
As described in detail above, in the magnetic component 1 according to the present embodiment, the four windings 5a to 5d are wound around the arm portions 3a to 3d protruding from the center in all directions, so that the magnetic component 1 is thin and flat. It can be formed into a shape. This can reduce the dead space.

For example, conventional reactors and transformers have windings on an annular magnetic material, so that they have a three-dimensional shape in the height direction and are high in height. Therefore, when a reactor or transformer was installed, a dead space was created around it. On the other hand, the magnetic component 1 according to the present embodiment has a thin flat shape as shown in FIGS. 1 and 2A, so that the height can be lowered and the dead space can be reduced.

In addition, since conventional reactors and transformers have a three-dimensional shape in the height direction, the windings are separated from the radiator even if they are installed on the radiator, and the heat dissipation performance cannot be improved. .. On the other hand, the magnetic component 1 according to the present embodiment has a thin and flat shape as shown in FIGS. 1 and 2A. Therefore, when the magnetic component 1 is installed on the radiator, both the winding and the magnetic material are close to the radiator. Moreover, it can be thermally coupled in a wide area. As a result, in the magnetic component 1 according to the present embodiment, the heat dissipation performance of both the winding and the magnetic material can be greatly improved.

Further, in the magnetic component 1 according to the present embodiment, since the windings 5a to 5d are provided on the four arm portions 3a to 3d, respectively, the windings are divided, so that the windings can be easily serialized or parallelized. can. As a result, the heat generation density can be reduced and the heat dissipation area can be increased. Further, since the diameter of each winding can be reduced, the labor for winding the wiring when forming the winding can be reduced.

Further, in a reactor or a transformer for a power converter that converts a large amount of electric power, the winding area is generally large, so that the load of the process of winding the wiring around the magnetic material has been excessive in the past. Further, there is a problem that the wiring cannot be brought into close contact with the corners of the magnetic material and a gap is created.

On the other hand, in the magnetic component 1 according to the present embodiment, since the wiring is wound around the arm portion of the magnetic material, that is, the portion protruding in the shape of a rod, the wiring can be easily wound in close contact with the magnetic component 1. Further, since the arm portion is rod-shaped, it is possible to install the winding simply by forming the winding in advance and inserting it into the arm portion.

Further, in the power converter, since a large potential difference may occur in the windings due to the electric operation, it is necessary to perform an insulation treatment or secure an insulation distance between the windings. However, since the conventional reactor and transformer have a large three-dimensional shape, it is difficult to take such measures and the cost is high.

On the other hand, in the magnetic component 1 according to the present embodiment, the winding is divided into a plurality of windings and has a structure protruding in all directions from the center of the first magnetic body 3, so that insulation treatment between the windings is performed. It is possible to easily secure the space for the work and also the insulation distance.

Further, in the magnetic component 1 according to the present embodiment, the second magnetic body 7 provided for refluxing the magnetic flux can be thinned. For example, assuming that the magnetic flux flowing through each of the windings 5a and 5b of the first winding set 9A is 100, the magnetic flux flowing through each of the windings 5c and 5d of the second winding set 9B is also 100. The magnetic flux of 100 is a combined magnetic flux when the orbiting magnetic flux passes through the positions of the windings 5a to 5d.

Here, since the magnetic flux generated from the windings 5c and 5d is divided into left and right and halved, the magnetic flux flowing through the second magnetic body 7 is 50. Therefore, since the magnetic flux flowing through the second magnetic body 7 is reduced, the second magnetic body 7 can be formed thinly, whereby the magnetic component 1 can be miniaturized as a whole and the cost can be reduced. It is also possible.

Further, in the magnetic component 1 according to the present embodiment, the second magnetic body 7 has a frame shape, and the tips of the arm portions 3a to 3d of the first magnetic body 3 are inside the second magnetic body 7. Magnetically connect. As a result, the magnetic flux generated from the windings 5a to 5d orbits the second magnetic body 7 to form a loop, so that the dead space can be reduced and the heat dissipation performance can be improved as described above.

Further, in the magnetic component 1 according to the present embodiment, the first magnetic body 3 is arranged so as to have a cross shape with respect to the frame shape of the second magnetic body 7. As a result, the arm portions 3a to 3d of the first magnetic body 3 are connected to the midpoints of the side surfaces of the second magnetic body 7, respectively, and the magnetic flux generated from the windings 5a to 5d orbits the second magnetic body 7. Can form a loop. Therefore, as described above, the dead space can be reduced and the heat dissipation performance can be improved.

Further, in the magnetic component 1 according to the present embodiment, the magnetic component 1 can be operated as a reactor by electrically connecting the first winding set 9A and the second winding set 9B.

Further, in the magnetic component 1 according to the present embodiment, the magnetic component 1 can be operated as an isolation transformer by insulating the first winding set 9A and the second winding set 9B. Generally, in an isolation transformer, the voltage of the primary winding and the voltage of the secondary winding are different, so it is an issue to secure the insulation between them. However, since the magnetic component 1 according to the present embodiment can easily secure a space for insulation treatment and an insulation distance as described above, if it is used as an isolation transformer, the problem can be easily solved and it is effective. Can be demonstrated.

Further, in the magnetic component 1 according to the present embodiment, the thickness of the magnetic body at the center of the first magnetic body 3 is formed to be thicker than that of the arm portions 3a to 3d. Further, in the magnetic component 1 according to the present embodiment, the width of the magnetic body at the center of the first magnetic body 3 is formed to be wider than that of the arm portions 3a to 3d. As a result, the cross-sectional area and volume of the magnetic material can be increased in the central portion of the first magnetic material 3, so that even if the magnetic flux generated from the windings 5a and 5b flows into the central portion of the first magnetic material 3, the magnetic flux is generated. It is possible to prevent the density from increasing. Further, when the windings 5a to 5d are arranged, the central portion of the first magnetic body 3 can function as a stopper, so that the magnetic component 1 can be easily manufactured.

[Second Embodiment]
Hereinafter, a second embodiment to which the present invention is applied will be described with reference to the drawings. FIG. 11 is a diagram showing a structure of a magnetic component according to the present embodiment. As shown in FIG. 11, the magnetic component 101 according to the present embodiment includes a first magnetic body 3, four windings 5a, 5b, 5c, and 5d wound around the first magnetic body 3, and a first. It includes a magnetic body 3 of 1 and a second magnetic body 7 magnetically connected to each other. In the present embodiment, the first magnetic body 3 is arranged so as to have an X-shape with respect to the frame shape of the second magnetic body 7, which is different from the first embodiment.

The first magnetic body 3 has a cross-shaped shape as in the first embodiment, and has rod-shaped arm portions 3a, 3b, 3c, and 3d protruding from the center in all directions. The tips of these arm portions 3a to 3d are magnetically connected to the inside of the second magnetic body 7. However, in the first embodiment, the tips of the arm portions 3a to 3d are connected to the midpoint of the side surface of the second magnetic body 7, but in the present embodiment, the frame-shaped second magnetic body 7 is connected. The tips of the arm portions 3a to 3d are connected to the inside of the apex. Since the structures of the windings 5a, 5d and the second magnetic body 7 are the same as those of the first embodiment, detailed description thereof will be omitted. Further, as in the first embodiment, the two windings 5a and 5b linearly arranged on the arm portions 3a and 3b are set as the first winding set 9A and linearly arranged on the arm portions 3c and 3d. The two arranged windings 5c and 5d are used as the second winding set 9B.

Here, with reference to FIG. 12, the flow of the magnetic flux orbiting the magnetic component 101 according to the present embodiment will be described. As shown in FIG. 12, the magnetic flux generated from the windings 5a and 5b of the first winding set 9A flows to the center of the first magnetic body 3 and changes its direction by 90 degrees, while the winding 5c is arranged on one side. The arm portion 3c is entered, and the other enters the arm portion 3d in which the winding 5d is arranged. In the arm portions 3c and 3d, the magnetic flux generated from the windings 5a and 5b is combined with the magnetic flux generated by the windings 5c and 5d, and the combined magnetic flux flows to the second magnetic body 7. The combined magnetic flux entering the second magnetic body 7 is divided into left and right, orbits the second magnetic body 7, and flows to the position of the apex connected to the first magnetic body 3. At this position, the magnetic fluxes flowing from the left and right merge and enter the arm portions 3a and 3b where the windings 5a and 5b are arranged to make a full circle. In this way, the magnetic flux generated by the windings 5a to 5d orbits the first magnetic body 3 and the second magnetic body 7 in four loops, respectively.

As the magnetic flux generated by the windings 5a to 5d circulates in a loop in this way, the magnetic component 101 has an inductance component and can convert the current energy into magnetic energy.

The windings 5a to 5d can be operated as a reactor or a transformer by electrically connecting the windings 5a to 5d as shown in FIGS. 7 to 10 described in the first embodiment. Further, as shown in FIGS. 2B and 2B, the central portion of the first magnetic body 3 may be thicker or wider as in the first embodiment.

[Effect of the second embodiment]
As described in detail above, in the magnetic component 101 according to the present embodiment, the first magnetic body 3 is arranged so as to have an X-shape with respect to the frame shape of the second magnetic body 7. As a result, the same effect as that of the magnetic component 1 of the first embodiment can be exhibited, and the length of one side of the second magnetic body 7 is further shortened to realize miniaturization and cost reduction of the magnetic component as a whole. be able to. Hereinafter, this effect will be specifically described.

As shown in FIG. 11, in the present embodiment, assuming that the length from the center of the first magnetic body 3 to the tip of the arm portion is L, the length of one side of the second magnetic body 7 is √2 × L. Will be. On the other hand, in the first embodiment, assuming that the length from the center of the first magnetic body 3 to the tip of the arm portion is L, the length of one side of the second magnetic body 7 is 2L.

Therefore, in the present embodiment, the length of one side of the second magnetic material 7 can be shortened from 2L to √2 × L. As a result, the magnetic path length when the magnetic flux orbits can be shortened, and the magnetic component 101 can be miniaturized, so that the cost can be reduced.

[Third Embodiment]
Hereinafter, a third embodiment to which the present invention is applied will be described with reference to the drawings. FIG. 13 is a diagram showing a structure of a magnetic component according to the present embodiment. As shown in FIG. 13, in the magnetic component 201 according to the present embodiment, the first embodiment is that a plurality of the first magnetic bodies 31 to 34 described in the first embodiment are arranged inside the second magnetic body 71. It is different from the form. In FIG. 13, the first magnetic bodies 31 to 34 are arranged in a cross shape with respect to the frame shape of the second magnetic body 71.

Each of the plurality of first magnetic bodies 31 to 34 has a cross-shaped shape as in the first embodiment, and has rod-shaped arm portions 3a, 3b, 3c, and 3d protruding from the center in all directions. ing. Of these arm portions, the tip of the arm portion facing the second magnetic body 71 is magnetically connected to the inside of the second magnetic body 71. On the other hand, the tip of the arm portion of the arm portion facing the adjacent first magnetic bodies 31 to 34 is magnetically connected to the tip of the arm portion of the adjacent first magnetic bodies 31 to 34. .. Since the structures of the windings 5a to 5d provided on the first magnetic bodies 31 to 34 are the same as those of the first embodiment, detailed description thereof will be omitted. Further, as in the first embodiment, the two windings 5a and 5b linearly arranged on the arm portions 3a and 3b of each of the first magnetic bodies 31 to 34 are designated as the first winding set 9A. The two windings 5c and 5d linearly arranged on the arm portions 3c and 3d are used as the second winding set 9B.

Then, in FIG. 13, the first winding set 9A of the first magnetic bodies 31 to 34 is linear with the second winding set 9B of the adjacent first magnetic bodies 31 to 34 on the arm portion. Have been placed. Further, the second winding set 9B of the first magnetic bodies 31 to 34 is linearly arranged on the arm portion with the first winding set 9A of the adjacent first magnetic bodies 31 to 34. ..

For example, the windings 5a and 5b forming the first winding set 9A of the first magnetic body 31 are the windings 5c and 5d forming the second winding set 9B of the adjacent first magnetic body 34. And are arranged linearly on the arm part. Similarly, the windings 5c and 5d forming the second winding set 9B of the first magnetic body 32 are the windings 5a forming the first winding set 9A of the adjacent first magnetic body 33. It is arranged linearly on 5b and the arm portion.

As shown in FIG. 13, the second magnetic body 71 has a frame-shaped shape, and has a size capable of arranging a plurality of first magnetic bodies 31 to 34 inside. Then, the magnetic flux generated from the plurality of first magnetic bodies 31 to 34 orbits the second magnetic body 71.

Here, with reference to FIG. 13, the flow of the magnetic flux orbiting the magnetic component 201 will be described. First, the flow of the magnetic flux generated from the first magnetic body 31 will be described. As shown in FIG. 13, the magnetic flux generated from the windings 5a and 5b of the first magnetic body 31 flows to the center of the first magnetic body 31 and changes its direction by 90 degrees, and the winding 5c is arranged on one side. The other arm portion 3c enters the arm portion 3c, and the other enters the arm portion 3d in which the winding 5d is arranged. In the arm portions 3c and 3d, the magnetic flux generated from the windings 5a and 5b is combined with the magnetic flux generated in the windings 5c and 5d, and the combined magnetic flux synthesized in the arm portion 3c flows to the second magnetic body 71. The combined magnetic flux synthesized by the arm portion 3d flows to the first magnetic body 32. The combined magnetic flux entering the second magnetic body 71 is divided into left and right, orbits the second magnetic body 71, respectively, and flows to the positions connected to the first magnetic bodies 31 and 34. At this position, the magnetic fluxes flowing from the left and right merge and enter the arm portion 3a in which the windings 5a of the first magnetic bodies 31 and 34 are arranged. Further, the combined magnetic flux entering the first magnetic body 32 is combined with the magnetic flux generated in the winding 5a of the first magnetic body 32.

Then, the magnetic flux generated from the first magnetic bodies 32 to 34 also flows and circulates in the same manner, so that the magnetic fluxes generated by the windings 5a to 5d of the first magnetic bodies 31 to 34 all circulate in a loop. As a result, the magnetic component 201 has an inductance component and can convert current energy into magnetic energy.

Further, as shown in FIG. 14, the first magnetic bodies 35 to 38 may be arranged so as to have the X-shape described in the second embodiment to form the magnetic component 301. In FIG. 14, among the arm portions of the plurality of first magnetic bodies 35 to 38, the tip of the arm portion facing the apex of the second magnetic body 71 is inside the apex of the second magnetic body 71. It is magnetically connected. Further, the tip of the arm portion of the arm portion facing the side surface of the second magnetic body 71 is magnetically connected to the inside of the side surface of the second magnetic body 71 and is adjacent to the first magnetic body. It is also magnetically connected to the tip of the arm portion of the bodies 35 to 38. Further, the tip of the arm portion of the arm portion that does not face the second magnetic body 71 is magnetically connected to the tip of the arm portion of the plurality of adjacent first magnetic bodies 35 to 38.

Then, in FIG. 14, the first winding set 9A of the first magnetic bodies 35 to 38 is linear with the first winding set 9A of the adjacent first magnetic bodies 35 to 38 on the arm portion. Have been placed. Further, the second winding set 9B of the first magnetic bodies 35 to 38 is linearly arranged on the arm portion with the second winding set 9B of the adjacent first magnetic bodies 35 to 38. ..

For example, the windings 5a and 5b forming the first winding set 9A of the first magnetic body 35 are the windings 5a and 5b forming the first winding set 9A of the adjacent first magnetic body 37. And are arranged linearly on the arm part. Similarly, the windings 5c and 5d forming the second winding set 9B of the first magnetic body 36 are the windings 5c forming the second winding set 9B of the adjacent first magnetic body 38. It is arranged linearly on 5d and the arm portion.

Next, with reference to FIG. 14, the flow of the magnetic flux orbiting the magnetic component 301 will be described. First, the flow of the magnetic flux generated from the first magnetic body 35 will be described. As shown in FIG. 14, the magnetic flux generated from the windings 5a and 5b of the first magnetic body 35 flows to the center of the first magnetic body 35 and changes its direction by 90 degrees, and the winding 5c is arranged on one side. The other arm portion 3c enters the arm portion 3c, and the other enters the arm portion 3d in which the winding 5d is arranged. In the arm portions 3c and 3d, the magnetic flux generated from the windings 5a and 5b is combined with the magnetic flux generated by the windings 5c and 5d, and the combined magnetic flux flows to the position connected to the second magnetic body 71. At the position connected to the second magnetic body 71, the adjacent first magnetic bodies 36 and 38 are also connected, so that the combined magnetic flux flows to the second magnetic body 71 and the first magnetic body 36, It also flows separately to the arm portion 3a in which the winding 5a of 38 is arranged.

The magnetic flux flowing through the second magnetic body 71 orbits the second magnetic body 71 and flows to the position of the apex connected to the first magnetic body 35. At this position, the magnetic fluxes flowing from the left and right merge, enter the arm portion 3a in which the winding 5a of the first magnetic body 35 is arranged, and make a full circle. The magnetic flux generated from the first magnetic body 37 also flows and orbits in the same manner.

Next, the flow of the magnetic flux generated from the first magnetic body 36 will be described. As shown in FIG. 14, the magnetic flux generated from the windings 5a and 5b of the first magnetic body 36 flows to the center of the first magnetic body 35 and changes its direction by 90 degrees, and the winding 5c is arranged on one side. The other arm portion 3c enters the arm portion 3c, and the other enters the arm portion 3d in which the winding 5d is arranged. In the arm portions 3c and 3d, the magnetic flux generated from the windings 5a and 5b is combined with the magnetic flux generated by the windings 5c and 5d. Of these, the combined magnetic flux synthesized by the winding 5c flows to the center of the magnetic component 301, and the combined magnetic flux synthesized by the winding 5d flows to the position of the apex connected to the second magnetic body 71. The combined magnetic flux entering the second magnetic body 71 from the apex of the second magnetic body 71 is divided into left and right, orbits the second magnetic body 71, and flows to the position connected to the first magnetic body 36. .. At this position, the magnetic flux flows through the second magnetic body 71 as it is, or enters the arm portions 3a and 3b of the first magnetic body 36. Further, the magnetic flux flowing to the center of the magnetic component 301 changes its direction by 90 degrees, one enters the arm portion 3b in which the winding 5b of the first magnetic body 35 is arranged, and the other is the winding of the first magnetic body 37. Enter the arm portion 3a where the wire 5a is arranged. The magnetic flux generated from the first magnetic body 38 also flows and orbits in the same manner.

Then, the magnetic flux generated from the first magnetic bodies 35 to 38 flows in this way, so that the magnetic fluxes generated by the windings 5a to 5d of the first magnetic bodies 35 to 38 all circulate in a loop. As a result, the magnetic component 301 has an inductance component and can convert the current energy into magnetic energy.

The windings 5a to 5d can be operated as reactors or transformers, respectively, by electrically connecting the windings 5a to 5d as shown in FIGS. 7 to 10 described in the first embodiment. Further, as shown in FIGS. 2B and 2B, the central portion of the first magnetic bodies 31 to 38 may be thicker or wider as in the first embodiment. Further, in the present embodiment, the case where four first magnetic materials are arranged inside the second magnetic material 71 has been described, but it is also possible to arrange more than four first magnetic materials.

Next, a case where the magnetic components 201 and 301 according to the present embodiment further include a wiring board for arranging the first magnetic body and the second magnetic body will be described.

As shown in FIG. 15, the wiring board 40 has the same external dimensions as the magnetic component 301, and an opening 42 is provided at the position of the winding of the first magnetic bodies 35 to 38. Therefore, as shown in FIG. 16, the winding positions of the first magnetic bodies 35 to 38 are aligned with the positions of the openings 42, and the first magnetic bodies 35 to 38 and the second magnetic body 71 are connected to the wiring board. If it is arranged on the 40, the magnetic component 301 can be accurately arranged on the wiring board 40. Then, if a wiring pattern (not shown) is appropriately formed on the surface of the wiring board 40, each winding can be electrically connected. Further, the thickness of the wiring board 40 is formed so as to be thinner than the thickness of the windings protruding vertically from the first magnetic material. Therefore, it is possible to prevent the thickness from increasing due to the thickness of the wiring board 40.

The wiring board 40 shown in FIG. 15 corresponds to the magnetic component 301, but the wiring board corresponding to the magnetic component 201 can also be formed in the same manner by changing the position of the opening.

[Effect of the third embodiment]
As described in detail above, in the magnetic component 201 according to the present embodiment, a plurality of the first magnetic bodies 31 to 34 are arranged inside the second magnetic body 71, and the arms of the first magnetic bodies 31 to 34 are arranged. The tip of the portion is magnetically connected to the tip of the arm portion of the adjacent first magnetic bodies 31 to 34. Then, the first winding set 9A of the first magnetic body is linearly arranged on the arm portion with the second winding set 9B of the adjacent first magnetic body, and the first magnetic body is the first. The winding set 9B of 2 is arranged linearly on the arm portion with the first winding set 9A of the adjacent first magnetic material.

Further, in the magnetic component 301 according to the present embodiment, a plurality of first magnetic bodies 35 to 38 are arranged inside the second magnetic body 71, and the tips of the arm portions of the first magnetic bodies 35 to 38 are adjacent to each other. It is magnetically connected to the tip of the arm portion of the first magnetic bodies 35 to 38. Then, the first winding set 9A of the first magnetic body is linearly arranged on the arm portion with the first winding set 9A of the adjacent first magnetic body, and the first magnetic body is the first. The winding set 9B of 2 is arranged linearly on the arm portion with the second winding set 9B of the adjacent first magnetic material.

As a result, in the magnetic components 201 and 301 according to the present embodiment, even if a plurality of first magnetic bodies functioning as reactors or transformers are arranged in series or in parallel, the dead space can be reduced and the heat dissipation performance can be improved. can. In addition, miniaturization and reduction of loss can be easily realized.

Further, in the magnetic components 201 and 301 according to the present embodiment, the second magnetic material for recirculating the magnetic flux can be further reduced. For example, as shown in FIG. 17, when four magnetic parts 101 are arranged side by side, the direction of the magnetic fluxes of the second magnetic bodies located between the adjacent magnetic parts 101 are opposite to each other, so that the magnetic flux is canceled. can do. Therefore, the second magnetic material located between the adjacent magnetic parts 101 can be deleted. Further, as for the second magnetic material forming the outer circumference, since the windings are dispersed in a large number, the magnetic flux is reduced and the magnetic material can be formed thin. The same applies to the case of the magnetic component 201 as shown in FIG. Therefore, the magnetic components 201 and 301 according to the present embodiment can be further reduced in size and cost.

Further, the magnetic components 201 and 301 according to the present embodiment further include a wiring board 40 for arranging the first magnetic body and the second magnetic body, and the wiring board 40 is provided with the position of the winding of the first magnetic body. Is provided with an opening 42. As a result, even if the number of windings increases, it is possible to easily route the wiring for connecting the windings.

[Fourth Embodiment]
Hereinafter, a fourth embodiment to which the present invention is applied will be described with reference to the drawings. 19 is a top view showing the structure of the magnetic component according to the present embodiment, FIG. 20 is a cross-sectional view taken along the line YY of FIG. 19, and FIG. 21 is a cross-sectional view taken along the line ZZ of FIG. As shown in FIGS. 19 to 21, in the magnetic component 401 according to the present embodiment, a plurality of first magnetic bodies are vertically arranged, and the central portions of the vertically arranged first magnetic bodies and each arm portion are arranged. The tips are magnetically connected to each other with a second magnetic material. In FIGS. 19 to 21, the first magnetic bodies 3A and 3B are arranged vertically, and the first magnetic bodies 3A and 3B are magnetically connected by the second magnetic bodies 75 and 77. In this embodiment, the case where two first magnetic materials are arranged one above the other is illustrated, but it is also possible to arrange more than two first magnetic materials.

The first magnetic bodies 3A and 3B have a cross-shaped shape as in the first embodiment, and have rod-shaped arm portions 3a, 3b, 3c, and 3d protruding from the center in all directions. Since the structures of the windings 5a and 5d arranged in the arm portions 3a to 3d are the same as those of the first embodiment, detailed description thereof will be omitted. Further, as in the first embodiment, the two windings 5a and 5b linearly arranged on the arm portions 3a and 3b are set as the first winding set 9A and linearly arranged on the arm portions 3c and 3d. The two arranged windings 5c and 5d are used as the second winding set 9B.

In the present embodiment, the second winding set 9B is arranged on the first winding set 9A, and the first winding set 9A is arranged on the second winding set 9B. The first magnetic bodies 3A and 3B are arranged one above the other. For example, as shown in FIG. 20, the first winding set 9B of the first magnetic body 3A is arranged on the first winding set 9A of the first magnetic body 3B. The magnetic bodies 3A and 3B of the above are arranged one above the other. Further, as shown in FIG. 21, the first winding set 9A of the first magnetic body 3A is arranged on the second winding set 9B of the first magnetic body 3B. The magnetic bodies 3A and 3B of the above are arranged one above the other.

The second magnetic bodies 75 and 77 have a block-like shape, and magnetically connect between the first magnetic bodies 3A and 3B arranged one above the other. The second magnetic body 75 magnetically connects the central portions of the first magnetic bodies 3A and 3B arranged vertically, and the second magnetic body 77 is the first magnetic body arranged vertically. The tips of the four arm portions of the magnetic bodies 3A and 3B are magnetically connected to each other. Therefore, in the present embodiment, one second magnetic body 75 and four second magnetic bodies 77 are arranged.

Here, with reference to FIGS. 19 to 21, the flow of the magnetic flux orbiting the magnetic component 401 will be described. As shown in FIGS. 19 and 21, the magnetic flux generated from the windings 5a and 5b of the first magnetic body 3A flows to the center of the first magnetic body 3A, respectively, and the winding 5c of the first magnetic body 3A. 5d is divided into arm portions 3c and 3d in which 5d is arranged, and at the same time, it descends and enters the second magnetic body 75.

Of these, the magnetic flux entering the arm portions 3c and 3d of the first magnetic body 3A is combined with the magnetic flux generated in the windings 5c and 5d as shown in FIG. 20, and the combined magnetic flux is the second magnetic body 77. to go into. The combined magnetic flux entering the second magnetic body 77 circulates downward and enters the arm portions 3a and 3b in which the windings 5a and 5b of the first magnetic body 3B are arranged. The magnetic flux entering the arm portions 3a and 3b of the first magnetic body 3B is combined with the magnetic flux generated by the windings 5a and 5b, enters the second magnetic body 75 in the central portion, and orbits upward. It flows into the center of the first magnetic material 3A again.

On the other hand, as shown in FIG. 21, among the magnetic fluxes generated from the windings 5a and 5b of the first magnetic body 3A, the magnetic flux entering the second magnetic body 75 downward from the center of the first magnetic body 3A. Flows into the center of the first magnetic material 3B. Here, the magnetic flux is divided into left and right, one enters the arm portion 3c in which the winding 5c of the first magnetic body 3B is arranged, and the other is the arm portion 3d in which the winding 5d of the first magnetic body 3B is arranged. to go into. The magnetic fluxes entering the arm portions 3c and 3d of the first magnetic body 3B are combined with the magnetic fluxes generated in the windings 5c and 5d, respectively, and the combined magnetic flux enters the second magnetic body 77 and circulates upward. It flows into the arm portions 3a and 3b of the first magnetic body 3A again. In this way, the magnetic flux generated by the windings 5a to 5d of the first magnetic bodies 3A and 3B circulates by drawing four loops that rotate up and down, respectively.

As the magnetic flux generated by the windings 5a to 5d circulates in a loop in this way, the magnetic component 401 has an inductance component and can convert the current energy into magnetic energy.

The windings 5a to 5d can be operated as reactors or transformers, respectively, by electrically connecting the windings 5a to 5d as shown in FIGS. 7 to 10 described in the first embodiment. Further, as shown in FIGS. 2B and 3B, the central portion of the first magnetic bodies 3A and 3B may be thicker or wider as in the first embodiment.

[Effect of Fourth Embodiment]
As described in detail above, in the magnetic component 401 according to the present embodiment, the second winding set 9B is arranged on the first winding set 9A, and the second winding set 9B is placed on the second winding set 9B. A plurality of first magnetic bodies 3A and 3B are arranged vertically so that the winding set 9A of 1 is arranged. Then, the central portions of the first magnetic bodies 3A and 3B arranged above and below and the tips of the arm portions are magnetically connected to each other by the second magnetic bodies 75 and 77. As a result, the shape of the second magnetic body can be changed from the frame shape surrounding the outside of the magnetic component to a block shape, so that the external dimensions of the magnetic component can be reduced and the size can be reduced. Further, since it is sufficient to prepare a necessary number of block-shaped second magnetic bodies having the same shape, the cost can be reduced.

The above embodiment is an example of the present invention. Therefore, the present invention is not limited to the above-described embodiment, and even if it is an embodiment other than this embodiment, as long as it does not deviate from the technical idea of the present invention, it depends on the design and the like. Of course, various changes are possible.

1, 101, 201, 301, 401 Magnetic parts 3, 3A, 3B, 31-38 First magnetic material 3a, 3b, 3c, 3d Arm part 5a, 5b, 5c, 5d Winding 7, 71, 75, 77 2nd magnetic material 9A 1st winding set 9B 2nd winding set 40 Wiring board 42 Opening

Claims (11)

A central portion, a first magnetic material having an arm portion protruding from the central portion in all directions, and a first magnetic material.
The four windings wound around the four arms of the first magnetic material, respectively, and
A second magnetic material magnetically connected to the first magnetic material is provided.
Of the four windings, two windings linearly arranged on the arm portion are used as a set to form a first winding set and a second winding set.
The first winding set is wound so that the direction of the generated magnetic flux is toward the center or the outside of the first magnetic material, and the second winding set is wound so that the direction of the generated magnetic flux is the first. It is wound so that it is in the opposite direction to the winding set of 1.
The magnetic flux generated from the first winding set and the second winding set orbits the second magnetic material.
The second magnetic material has a frame shape and has a frame shape.
The tip of the arm portion of the first magnetic material is magnetically connected to the inside of the second magnetic material.
A magnetic component characterized in that a plurality of the first magnetic materials are arranged inside the second magnetic material . The magnetic component according to claim 1 , wherein the first magnetic material is arranged so as to have a cross shape with respect to the frame shape of the second magnetic material. The tip of the arm portion of the first magnetic material is magnetically connected to the tip of the arm portion of the adjacent first magnetic material.
The first winding set of the first magnetic body is linearly arranged on the arm portion with the second winding set of the adjacent first magnetic body, and the second winding set of the first magnetic body is arranged. The magnetic component according to claim 2 , wherein the winding set is linearly arranged on the arm portion with the first winding set of the adjacent first magnetic body. The magnetic component according to claim 1 , wherein the first magnetic material is arranged so as to have an X-shape with respect to the frame shape of the second magnetic material. The tip of the arm portion of the first magnetic material is magnetically connected to the tip of the arm portion of the adjacent first magnetic material.
The first winding set of the first magnetic body is linearly arranged on the arm portion with the first winding set of the adjacent first magnetic body, and the second winding set of the first magnetic body is arranged. The magnetic component according to claim 4 , wherein the winding set is linearly arranged on the arm portion with the second winding set of the adjacent first magnetic body. A wiring board on which the first magnetic material and the second magnetic material are arranged is further provided, and the wiring board is characterized in that an opening is provided at a position of a winding of the first magnetic material. The magnetic component according to claim 3 or 5 . The first magnetic material is arranged so that the second winding set is arranged on the first winding set and the first winding set is placed on the second winding set. Arrange multiple pieces above and below,
The magnetic component according to claim 1, wherein the second magnetic material magnetically connects the central portions of the first magnetic material arranged above and below and the tips of the respective arm portions. .. The magnetism according to any one of claims 1 to 7 , wherein the first magnetic material is formed so that the thickness of the magnetic material in the central portion is thicker than that of the arm portion. parts. The magnetic component according to any one of claims 1 to 7 , wherein the first magnetic material is formed so that the width of the magnetic material in the central portion is wider than that of the arm portion. .. The magnetic component according to any one of claims 1 to 9 , wherein the first winding set and the second winding set are electrically connected. The magnetic component according to any one of claims 1 to 9 , wherein the first winding set and the second winding set are insulated.

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