Magnetic component, electric circuit and power conversion circuit

Abstract

To provide a magnetic component, an electric circuit, and a power conversion circuit that are capable of reducing loss.SOLUTION: A magnetic component includes a magnetic core portion and first and second conductive members. The magnetic core includes first to third cores. A first direction from the first core to the fourth core intersects with a second direction from the first core to the third core. A direction from the third core to the second core is along the first direction. A direction from the fourth core to the second core is along the second direction. The first conductive member includes first and second conductive portions. The first conductive portion is wound around the first core in a first winding direction. The second conductive portion is wound around the second core in a second winding direction. The second winding direction is opposite to the first winding direction. The second conductive member includes third and fourth conductive portions. The third conductive portion is wound around the third core in a third winding direction. The fourth conductive portion is wound around the fourth core in a fourth winding direction. The fourth winding direction is opposite to the third winding direction.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] Embodiments of the present invention relate to magnetic components, electric circuits, and power conversion circuits.

Background Art

[0002] For example, a magnetic component including a conductive member wound around a magnetic core is used in a power conversion circuit or the like. Reduction of loss in the magnetic component is desired.

Prior Art Documents

Non-Patent Documents

[0003]

Non-Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] Embodiments provide a magnetic component, an electric circuit, and a power conversion circuit capable of reducing loss.

Means for Solving the Problems

[0005] According to an embodiment, the magnetic component includes a magnetic core portion, a first conductive member, and a second conductive member. The magnetic core includes a first core, a second core, a third core, and a fourth core. A first direction from the first core to the fourth core intersects a second direction from the first core to the third core. A direction from the third core to the second core is along the first direction. A direction from the fourth core to the second core is along the second direction. A first distance between the first core and the fourth core is the same as a third distance between the first core and the third core. The first distance is the same as a second distance between the third core and the second core. The first distance is the same as a fourth distance between the fourth core and the second core. The first conductive member includes a first conductive portion and a second conductive portion. The first conductive portion is wound around the first core in a first winding direction. The second conductive portion is wound around the second core in a second winding direction. The second winding direction is opposite to the first winding direction. The second conductive member includes a third conductive portion and a fourth conductive portion. The third conductive portion is wound around the third core in a third winding direction. The fourth conductive portion is wound around the fourth core in a fourth winding direction. The fourth winding direction is opposite to the third winding direction.

Brief Description of the Drawings

[0006]

Figure 1

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[0007] Hereinafter, each embodiment of the present invention will be described with reference to the drawings. The drawings are schematic or conceptual, and the relationship between the thickness and width of each part, the ratio of the sizes between parts, etc. are not necessarily the same as the actual ones. Even when representing the same part, the dimensions and ratios may be represented differently in the drawings. In the present specification and each figure, the same elements as those described above with respect to the previously shown figures are denoted by the same reference numerals, and detailed description thereof will be omitted as appropriate.

[0008] (First Embodiment) FIGS. 1 to 4 are schematic diagrams illustrating the magnetic component according to the first embodiment. FIG. 5 is an equivalent circuit diagram illustrating the magnetic component according to the first embodiment. Figs. 1 to 3 are perspective views. Fig. 4 is a plan view illustrating a part of the magnetic component.

[0009] As shown in Fig. 1, the magnetic component 110 according to the embodiment includes a magnetic core part 30, a first conductive member 10, and a second conductive member 20. The magnetic core part 30 includes a first core 31, a second core 32, a third core 33, and a fourth core 34.

[0010] Fig. 4 illustrates these cores. A first direction D1 from the first core 31 to the fourth core 34 intersects a second direction D2 from the first core 31 to the third core 33. The direction from the third core 33 to the second core 32 is along the first direction D1. The direction from the fourth core 34 to the second core 32 is along the second direction D2. The angle between the first direction D1 and the second direction D2 is arbitrary. The second direction D2 may be inclined or orthogonal to the first direction D1.

[0011] Let the distance between the first core 31 and the fourth core 34 be a first distance d1. The first distance d1 is the same as a third distance d3 between the first core 31 and the third core 33. The first distance d1 is the same as a second distance d2 between the third core 33 and the second core 32. The first distance d1 is the same as a fourth distance d4 between the fourth core 34 and the second core 32. Let the plane including the first direction D1 and the second direction D2 be a first plane PL1. These distances may be distances related to the positions of the centers of the respective cores in the first plane PL1.

[0012] The first core 31, the second core 32, the third core 33, and the fourth core 34 are provided at the vertices of a rhombus in the first plane PL1. The rhombus includes a square.

[0013] As shown in FIGS. 1 and 3, the first conductive member 10 includes a first conductive portion 11 and a second conductive portion 12. The first conductive portion 11 is wound around the first core 31 in a first winding direction. The second conductive portion 12 is wound around the second core 32 in a second winding direction. The second winding direction is opposite to the first winding direction. The winding direction is, for example, the direction in which the first conductive member 10 rotates with respect to each core when, in a plan view seen along the intersection direction Dz1, starting from the first connection point S1 side and ending at the second connection point S2 side.

[0014] As shown in FIG. 3, for example, when a first current i1 is supplied to the first conductive member 10, the direction of the first magnetic flux Φ1 passing through the first core 31 includes a component opposite to the direction of the second magnetic flux Φ2 passing through the second core 32.

[0015] As shown in FIGS. 1 and 3, the second conductive member 20 includes a third conductive portion 23 and a fourth conductive portion 24. The third conductive portion 23 is wound around the third core 33 in a third winding direction. The fourth conductive portion 24 is wound around the fourth core 34 in a fourth winding direction. The fourth winding direction is opposite to the third winding direction. The winding direction is, for example, the direction in which the second conductive member 20 rotates with respect to each core when, in a plan view seen along the intersection direction Dz1, starting from the third connection point S3 side and ending at the fourth connection point S4 side.

[0016] As shown in FIG. 3, for example, when a second current i2 is supplied to the second conductive member 20, the direction of the third magnetic flux Φ3 passing through the third core 33 includes a component opposite to the direction of the fourth magnetic flux Φ4 passing through the fourth core 34.

[0017] In the embodiment, the first conductive member 10 is wound around the first core 31 and the second core 32, and the winding directions are opposite to each other. The second conductive member 20 is wound around the third core 33 and the fourth core 34, and the winding directions are opposite to each other. The first conductive member 10 and the second conductive member 20 are conductive wires.

[0018] For example, one of the first conductive member 10 and the second conductive member 20 functions as an inductor (DC inductor) for flowing a DC current component. For example, the other of the first conductive member 10 and the second conductive member 20 functions as an inductor (AC inductor) for flowing an AC current component. The magnetic component 110 is, for example, a coupled inductor.

[0019] In the embodiment, for example, in the first conductive portion 11 and the second conductive portion 12, magnetic fluxes cancel (or suppress) each other. For example, in the third conductive portion 23 and the fourth conductive portion 24, magnetic fluxes cancel (or suppress) each other. With such an arrangement of a plurality of cores and the configuration of the wiring, losses are suppressed. For example, while the DC inductor and the AC inductor are integrated, an independent and efficient operation can be obtained. According to the embodiment, a magnetic component capable of reducing losses can be provided.

[0020] For example, the first conductive member 10 is configured to function as a DC inductor. The second conductive member 20 is configured to function as an AC inductor. In this case, the first conductive member 10 may include, for example, an edge-wound coil. For example, the second conductive member 20 may include a litz wire. Higher efficiency is easily obtained.

[0021] As shown in FIG. 2, the magnetic core portion 30 may further include a first base portion 38a. The first base portion 38a is connected to the first core 31, the second core 32, the third core 33, and the fourth core 34. The first base portion 38a has, for example, a flat plate shape extending in the first direction D1 and the second direction D2. The first core 31, the second core 32, the third core 33, and the fourth core 34 extend, for example, along the intersection direction Dz1 from the first base portion 38a.

[0022] The magnetic core part 30 may further include a second base part 38b. Between the first base part 38a and the second base part 38b, a first core 31, a second core 32, a third core 33, and a fourth core 34 are provided. The second base part 38b may be connected to the first core 31, the second core 32, the third core 33, and the fourth core 34. In FIG. 2, for ease of viewing, the second base part 38b is depicted separated from other components. The second base part 38b has, for example, a flat plate shape extending in a first direction D1 and a second direction D2. The first core 31, the second core 32, the third core 33, and the fourth core 34 extend, for example, along an intersecting direction Dz1 from the second base part 38b. The first core 31, the second core 32, the third core 33, and the fourth core 34 are positioned between the first base part 38a and the second base part 38b in the intersecting direction Dz1. In a plan view along the intersecting direction Dz1, the rhombus with the first core 31, the second core 32, the third core 33, and the fourth core 34 as vertices is positioned inside the outer edge part of the first base part 38a and the outer edge part of the second base part 38b.

[0023] The first core 31, the second core 32, the third core 33, and the fourth core 34 may include, for example, ferrite or the like. The first base part 38a and the second base part 38b may include, for example, ferrite or the like. The first conductive member 10 and the second conductive member 20 may include, for example, copper, aluminum, silver, or gold, or the like. The materials of these components can be variously deformed.

[0024] As shown in FIG. 5, the first conductive part 11 is electrically connected in series with the second conductive part 12. The first conductive part 11 is continuous with the second conductive part 12. The third conductive part 23 is electrically connected in series with the fourth conductive part 24. The third conductive part 23 is continuous with the fourth conductive part 24.

[0025] As shown in FIG. 5, the magnetic component 110 may further include a first connection point S1, a second connection point S2, a third connection point S3, and a fourth connection point S4. These connection points may be, for example, terminals.

[0026] The first conductive part 11 includes a first part 11a and a first other part 11b. The second conductive part 12 includes a second part 12a and a second other part 12b. The third conductive part 23 includes a third part 23a and a third other part 23b. The fourth conductive part 24 includes a fourth part 24a and a fourth other part 24b. The first other part 11b is connected to the second part 12a. The third other part 23b is connected to the fourth part 24a. The first connection point S1 is connected to the first part 11a. The second connection point S2 is connected to the second other part 12b. The third connection point S3 is connected to the third part 23a. The fourth connection point S4 is connected to the fourth other part 24b.

[0027] For example, the second connection point S2 is electrically connected to the fourth connection point S4. The first conductive member 10 and the second conductive member 20 are electrically connected in parallel.

[0028] The first conductive part 11 and the second conductive part 12 function as, for example, a DC inductor. The third conductive part 23 and the fourth conductive part 24 function as, for example, an AC inductor. The first conductive part 11 and the second conductive part 12 have, for example, a first inductance L DC The third conductive part 23 and the fourth conductive part 24 have, for example, a second inductance L AC

[0029] The magnetic component 110 according to the embodiment can be applied to the electric circuit 210 (see FIG. 5). The electric circuit 210 includes the magnetic component 110 according to the embodiment and a first capacitor 41. The first capacitor 41 is configured to be coupled to, for example, the second conductive member 20. The first capacitor 41 has a capacitance C hf

[0030] ​​As shown in FIG. 5, the first capacitor 41 includes a first capacitor terminal 41a and a first other capacitor terminal 41b. As already described, the first other part 11b is connected to the second part 12a. The third other part 23b is connected to the fourth part 24a. The second other part 12b is connected to the fourth other part 24b. The first other capacitor terminal 41b is connected to the third part 23a. The first capacitor terminal 41a is connected to the first part 11a.

[0031] As shown in FIG. 5, the electric circuit 210 may include a first terminal T1 and a second terminal T2. The first terminal T1 is electrically connected to the first part 11a (the first capacitor terminal 41a). The second terminal T2 is electrically connected to the second other part 12b (and the fourth other part 24b). For example, the first terminal T1 may function as an input terminal. For example, the second terminal T2 may function as an output terminal.

[0032] In a chopper circuit or the like in the first reference example, one inductor (magnetic component) is provided. In contrast, a second reference example in which a DC inductor and an AC inductor are provided can be considered.

[0033] FIG. 6 is an equivalent circuit diagram illustrating the magnetic component of the second reference example. As shown in FIG. 6, in the magnetic component 119 of the second reference example, a coil having a first inductance L DC and a coil having a second inductance L AC are provided. In the magnetic component 119, magnetic fluxes in opposite directions are not formed. Such a magnetic component 119 is combined with a capacitor having a capacitance C hf . In the second reference example, for example, a DC inductor and an AC inductor are provided independently of each other.

[0034] In contrast, the magnetic component 110 according to the embodiment is a coupled inductor. And a wiring configuration in which magnetic fluxes are canceled is applied.

[0035] The loss in the above-mentioned second reference example can be reduced to about 85% of the loss in the above-mentioned first reference example. The volume of the magnetic component in the above-mentioned second reference example can be reduced to about 94% of the volume of the magnetic component in the above-mentioned first reference example.

[0036] The loss in the magnetic component 110 according to the embodiment can be reduced to about 82% of the loss in the magnetic component 119 of the first reference example. The volume of the magnetic component 110 according to the embodiment can be reduced to about 79% of the volume of the magnetic component 119 of the first reference example.

[0037] Thus, in the embodiment, the loss can be reduced. The volume can be reduced. For example, the height of the magnetic component can be suppressed. The height is the length of the magnetic component 110 in the intersection direction Dz1 that intersects the plane including the first direction D1 and the second direction D2.

[0038] As shown in FIG. 1, in the magnetic component 110, at least a part of the first conductive portion 11 is provided around the first core 31 within the first plane PL1 including the first direction D1 and the second direction D2. At least a part of the second conductive portion 12 is provided around the second core 32 within the first plane PL1. At least a part of the third conductive portion 23 is provided around the third core 33 within the first plane PL1. At least a part of the fourth conductive portion 24 is provided around the fourth core 34 within the first plane PL1. The wound state of the conductive portion can be variously deformed.

[0039] FIGS. 7 to 10 are schematic perspective views illustrating the magnetic component according to the first embodiment. As shown in FIG. 7, in the magnetic component 110a according to the embodiment, the first conductive portion 11 is continuously wound around the first core 31 a first number of times. The second conductive portion 12 is continuously wound around the second core 32 a second number of times. The third conductive portion 23 is continuously wound around the third core 33 a third number of times. The fourth conductive portion 24 is continuously wound around the fourth core 34 a fourth number of times.

[0040] In this example, for instance, the first number of turns, the second number of turns, the third number of turns, and the fourth number of turns are each 2 or more. In an embodiment, for example, the first number of turns is the same as the second number of turns. For example, the third number of turns is the same as the fourth number of turns. The magnetic flux is easily canceled. For the convenience of drawing, the first to fourth numbers of turns may be illustrated as increasing or decreasing by half a turn.

[0041] In the magnetic component 110a, the first connection point S1 is provided near the first core 31. The second connection point S2 is provided near the second core 32. The third connection point S3 is provided near the third core 33. The fourth connection point S4 is provided near the fourth core 34.

[0042] As shown in FIG. 8, in the magnetic component 110b according to the embodiment, the first connection point S1 and the second connection point S2 are provided near the first core 31. The third connection point S3 and the fourth connection point S4 are provided near the third core 33.

[0043] In the magnetic component 110, the magnetic component 110a, and the magnetic component 110b, the first number of turns may be greater than the third number of turns. Thereby, for example, the first inductance L DC (DC) can be made sufficiently larger than the second inductance L AC (AC). Thereby, the flow of an alternating current through the first conductive member 10 is suppressed. Low losses are easily obtained. In one example, the first number of turns may be 3 times or more the third number of turns. Low losses can be effectively obtained.

[0044] For example, the first inductance L DC of the first conductive member 10 may be 9 times or more the second inductance L AC of the second conductive member 20.

[0045] As shown in FIG. 9, in the magnetic component 110c according to the embodiment, a plurality of first conductive portions 11 are provided, and a plurality of second conductive portions 12 are provided. One of the plurality of first conductive portions 11 is between one of the plurality of second conductive portions 12 and another one of the plurality of second conductive portions 12. One of the plurality of second conductive portions 12 is between one of the plurality of first conductive portions 11 and another one of the plurality of first conductive portions 11.

[0046] In the magnetic component 110c, a plurality of third conductive portions 23 may be provided, and a plurality of the fourth conductive portions 24 may be provided. One of the plurality of third conductive portions 23 is between one of the plurality of fourth conductive portions 24 and another one of the plurality of fourth conductive portions 24. One of the plurality of fourth conductive portions 24 is between one of the plurality of third conductive portions 23 and another one of the plurality of third conductive portions 23.

[0047] In the magnetic component 110c, the first connection point S1 and the second connection point S2 are provided near the first core 31. The third connection point S3 and the fourth connection point S4 are provided near the third core 33.

[0048] As shown in FIG. 10, also in the magnetic component 110d according to the embodiment, a plurality of first conductive portions 11, a plurality of second conductive portions 12, a plurality of third conductive portions 23, and a plurality of fourth conductive portions 24 are provided. In the magnetic component 110d, the first connection point S1 is provided near the first core 31. The second connection point S2 is provided near the second core 32. The third connection point S3 is provided near the third core 33. The fourth connection point S4 is provided near the fourth core 34.

[0049] (Second Embodiment) The second embodiment relates to the electric circuit 210 (see FIG. 5). As already described, the electric circuit 210 includes a magnetic component (such as 110, 110a to 110d) according to the embodiment and a first capacitor 41. The first capacitor 41 is configured to be coupled to, for example, the second conductive member 20. The first capacitor 41 has a capacitance C hf and has.

[0050] Let the switching frequency be f sw and let the inductance of the second conductive member 20 be L AC At this time, the capacitance C of the first capacitor 41 hf is preferably smaller than 1 / {4π 2 ·(f sw ) 2 ·L AC}. Thereby, at the switching frequency (the target frequency), the second conductive member 20 functions sufficiently as an inductor. For example, the capacitance C hf is 1 / 5 or less of 1 / {4π 2 ·(f sw ) 2 ·L AC}. The switching frequency f sw corresponds to the operating frequency of a power conversion circuit (described later) including the electric circuit 210.

[0051] (Third Embodiment) FIG. 11 is an equivalent circuit diagram illustrating a power conversion circuit according to the third embodiment. As shown in FIG. 11, a power conversion circuit 310 according to the embodiment includes the electric circuit 210 according to the second embodiment, a first switch element Q1, and a second switch element Q2. The second switch element Q2 is electrically connected in series with the first switch element Q1. The drive frequencies of the first switch element Q1 and the second switch element Q2 correspond to the switching frequency f sw .

[0052] The first switch element Q1 includes a first switch portion Q1a and a first other switch portion Q1b. The second switch element Q2 includes a second switch portion Q2a and a second other switch portion Q2b. The first other switch portion Q1b is electrically connected to the second switch portion Q2a.

[0053] The electric circuit 210 includes a first terminal T1 and a second terminal T2. As already described, the first terminal T1 is electrically connected to the first portion 11a (see FIG. 5). The second terminal T2 is electrically connected to the second other portion 12b. The second terminal T2 is electrically connected to the first other switch portion Q1b and the second switch portion Q2a.

[0054] The power conversion circuit 310 may further include a second capacitor 42. The second capacitor 42 includes a second capacitor terminal 42a and a second other capacitor terminal 42b. The second capacitor terminal 42a is electrically connected to the first switch portion Q1a. The second other capacitor terminal 42b is electrically connected to the first terminal T1.

[0055] The power conversion circuit 310 may further include a third capacitor 43. The third capacitor 43 includes a third capacitor terminal 43a and a third other capacitor terminal 43b. The third capacitor terminal 43a is electrically connected to the first switch portion Q1a. The third other capacitor terminal 43b is electrically connected to the second other switch portion Q2b.

[0056] For example, the potential between the second capacitor terminal 42a and the second other capacitor terminal 42b is the first voltage Vin. The potential between the third capacitor terminal 43a and the third other capacitor terminal 43b is the second voltage Vout. An input current i is supplied to the first terminal T1. A first partial current i flows through the first conductive member 10. A second partial current i flows through the second conductive member 20. In the power conversion circuit 310, for example, the first voltage Vin is converted into the second voltage Vout. In the power conversion circuit 310, for example, voltage conversion is performed. L is supplied. A first partial current i flows through the first conductive member 10. DC A second partial current i flows through the second conductive member 20. AC In the power conversion circuit 310, for example, the first voltage Vin is converted into the second voltage Vout. In the power conversion circuit 310, for example, voltage conversion is performed.

[0057] FIGS. 12(a) and 12(b) are graphs illustrating the characteristics of the power conversion circuit according to the third embodiment. The horizontal axis of these figures is the time tm. FIG. 12(a) illustrates the first voltage Vin and the second voltage Vout. The vertical axis of FIG. 12(a) is voltage. FIG. 12(b) illustrates the input current i, L the first partial current i, DC and the second partial current i. AC The vertical axis of FIG. 12(b) is current.

[0058] As shown in FIG. 12(b), the input current i L is the first partial current i of the DC componentDC and the second partial current i of the alternating current component AC is separated. The period Tf of the alternating current component may be, for example, 0.1 μs or more and 10 μs or less. Such a first partial current i DC and the second partial current i AC convert the voltage.

[0059] As shown in FIG. 12(a), the second voltage Vout (output) is different from the first voltage Vin (input). The first voltage Vin is, for example, 18V. The second voltage Vout is, for example, 48V. The power conversion circuit 310 corresponds to, for example, a chopper circuit.

[0060] FIGS. 13 to 16 are equivalent circuit diagrams illustrating the power conversion circuit according to the third embodiment. As shown in FIG. 13, in the power conversion circuit 311 according to the embodiment, the second switch element Q2 is connected in series with the first switch element Q1. The second terminal T2 is connected to the connection point of the first other switch portion Q1b and the second switch portion Q2a. The first terminal T1 is connected to the connection point of the second capacitor terminal 42a and the third capacitor terminal 43a. The power conversion circuit 311 corresponds to, for example, a buck-boost chopper circuit.

[0061] As shown in FIG. 14, the power conversion circuit 312 according to the embodiment includes a third switch element Q3 and a fourth switch element Q4. The fourth switch element Q4 is connected in series with the third switch element Q3. The first terminal T1 is electrically connected to the connection portion of the third switch element Q3 and the fourth switch element Q4. The second terminal T2 is electrically connected to the connection portion of the first switch element Q1 and the second switch element Q2. The third switch element Q3 and the fourth switch element Q4 are connected in parallel with the second capacitor 42. The first switch element Q1 and the second switch element Q2 are connected in parallel with the third capacitor 43. The power conversion circuit 312 corresponds to, for example, an H-bridge circuit.

[0062] As shown in FIG. 15, in the power conversion circuit 313 according to the embodiment, the second terminal T2 is electrically connected to the first other switch portion Q1b and the second switch portion Q2a. The power conversion circuit 313 includes a first rectifying element 61, a second rectifying element 62, a third rectifying element 63, and a fourth rectifying element 64. The second rectifying element 62 is connected in series with the first rectifying element 61. The fourth rectifying element 64 is connected in series with the third rectifying element 63. A circuit including the first rectifying element 61 and the second rectifying element 62 is connected in parallel with a circuit including the third rectifying element 63 and the fourth rectifying element 64. A connection point between the second rectifying element 62 and the fourth rectifying element 64 is connected to the first terminal T1. A connection point between the first rectifying element 61 and the third rectifying element 63 is connected to the first switch portion Q1a. The power conversion circuit 313 corresponds to, for example, a boost PFC (Power Factor Correction) circuit.

[0063] As shown in FIG. 16, in the power conversion circuit 313 according to the embodiment, the second switch element Q2 is connected in series with the first switch element Q1. The fourth switch element Q4 is connected in series with the third switch element Q3. A circuit including the first switch element Q1 and the second switch element Q2 is connected in parallel with a circuit including the third switch element Q3 and the fourth switch element Q4. The second terminal T2 is connected to a connection point between the first switch element Q1 and the second switch element Q2 and a connection point between the third switch element Q3 and the fourth switch element Q4. The power conversion circuit 313 corresponds to, for example, a totem-pole PFC circuit.

[0064] The magnetic component according to the embodiment may be applied to various circuits.

[0065] The embodiment may include, for example, the following technical solutions. (Technical solution 1) A magnetic core part including a first core, a second core, a third core, and a fourth core, wherein a first direction from the first core to the fourth core intersects a second direction from the first core to the third core, a direction from the third core to the second core is along the first direction, a direction from the fourth core to the second core is along the second direction, a first distance between the first core and the fourth core is the same as a third distance between the first core and the third core, the first distance is the same as a second distance between the third core and the second core, and the first distance is the same as a fourth distance between the fourth core and the second core; the magnetic core part, A first conductive member including a first conductive portion and a second conductive portion, wherein the first conductive portion is wound around the first core in a first winding direction, the second conductive portion is wound around the second core in a second winding direction opposite to the first winding direction; the first conductive member, A second conductive member including a third conductive portion and a fourth conductive portion, wherein the third conductive portion is wound around the third core in a third winding direction, the fourth conductive portion is wound around the fourth core in a fourth winding direction opposite to the third winding direction; the second conductive member, A magnetic component comprising the above.

[0066] (Technical solution 2) When a first current is supplied to the first conductive member, the direction of a first magnetic flux passing through the first core includes a component opposite to the direction of a second magnetic flux passing through the second core. The magnetic component according to Technical solution 1, wherein when a second current is supplied to the second conductive member, the direction of a third magnetic flux passing through the third core includes a component opposite to the direction of a fourth magnetic flux passing through the fourth core.

[0067] (Technical solution 3) The first conductive member is configured to function as a DC inductor. The magnetic component according to Technical solution 1 or 2, wherein the second conductive member is configured to function as an AC inductor.

[0068] (Technical Solution 4) The first conductive member includes an edge-wound coil, The second conductive member includes a litz wire, and is the magnetic component according to any one of Technical Solutions 1 to 3.

[0069] (Technical Solution 5) At least a part of the first conductive portion is provided around the first core in a first plane including the first direction and the second direction, At least a part of the second conductive portion is provided around the second core in the first plane, At least a part of the third conductive portion is provided around the third core in the first plane, At least a part of the fourth conductive portion is provided around the fourth core in the first plane, and is the magnetic component according to any one of Technical Solutions 1 to 4.

[0070] (Technical Solution 6) The first conductive portion is continuously wound around the first core a first number of times, The second conductive portion is continuously wound around the second core a second number of times, The first number of times is the same as the second number of times, The third conductive portion is continuously wound around the third core a third number of times, The fourth conductive portion is continuously wound around the fourth core a fourth number of times, The third number of times is the same as the fourth number of times, and is the magnetic component according to any one of Technical Solutions 1 to 5.

[0071] (Technical Solution 7) The first number of times is greater than the third number of times, and is the magnetic component according to Technical Solution 6.

[0072] (Technical Solution 8) The first number of times is three times or more the third number of times, and is the magnetic component according to Technical Solution 6.

[0073] (Technical Solution 9) A plurality of the first conductive portions are provided, A plurality of the second conductive portions are provided. One of the plurality of first conductive portions is between one of the plurality of second conductive portions and another one of the plurality of second conductive portions. One of the plurality of second conductive portions is between one of the plurality of first conductive portions and another one of the plurality of first conductive portions. The magnetic component according to any one of Technical Solutions 1 to 5.

[0074] (Technical Solution 10) A plurality of the third conductive portions are provided. A plurality of the fourth conductive portions are provided. One of the plurality of third conductive portions is between one of the plurality of fourth conductive portions and another one of the plurality of fourth conductive portions. One of the plurality of fourth conductive portions is between one of the plurality of third conductive portions and another one of the plurality of third conductive portions. The magnetic component according to Technical Solution 9.

[0075] (Technical Solution 11) The magnetic core portion further includes a first base portion. The first base portion is connected to the first core, the second core, the third core, and the fourth core. The magnetic component according to any one of Technical Solutions 1 to 10.

[0076] (Technical Solution 12) The magnetic core portion further includes a second base portion. The first core, the second core, the third core, and the fourth core are provided between the first base portion and the second base portion. The second base portion is connected to the first core, the second core, the third core, and the fourth core. The magnetic component according to Technical Solution 11.

[0077] (Technical Solution 13) The first inductance of the first conductive member is three times or more the second inductance of the second conductive member. The magnetic component according to any one of Technical Solutions 1 to 12.

[0078] (Technical Solution 14) Further comprising a first connection point, a second connection point, a third connection point, and a fourth connection point, The first conductive portion includes a first portion and a first other portion, The second conductive portion includes a second portion and a second other portion, The third conductive portion includes a third portion and a third other portion, The fourth conductive portion includes a fourth portion and a fourth other portion, The first other portion is connected to the second portion, The third other portion is connected to the fourth portion, The first connection point is connected to the first portion, The second connection point is connected to the second other portion, The third connection point is connected to the third portion, The fourth connection point is connected to the fourth other portion, and the magnetic component according to any one of Technical Solutions 1 to 13.

[0079] (Technical Solution 15) The magnetic component according to Technical Solution 14, wherein the second connection point is electrically connected to the fourth connection point.

[0080] (Technical Solution 16) The magnetic component according to any one of Technical Solutions 1 to 13, and A first capacitor, and Comprising, The first capacitor is configured to be coupled to the second conductive member, and the electrical circuit.

[0081] (Technical Solution 17) The first conductive portion includes a first portion and a first other portion, The second conductive portion includes a second portion and a second other portion, The third conductive portion includes a third portion and a third other portion, The fourth conductive portion includes a fourth portion and a fourth other portion, The first capacitor includes a first capacitor terminal and a first other capacitor terminal, The first other portion is connected to the second portion, The third other part is connected to the fourth part. The second other part is connected to the fourth other part. The first other capacitor terminal is connected to the third part. The first capacitor terminal is connected to the first part, and the electric circuit described in Technical Solution 16.

[0082] (Technical Solution 18) Let the switching frequency be f sw and the inductor of the second conductive member be L AC When this is the case, the capacitance C of the first capacitor hf is 1 / {4π 2 ·(f sw ) 2 ·L AC}, and is 1 / 5 or less of the value, and the electric circuit described in Technical Solution 17.

[0083] (Technical Solution 19) The electric circuit described in Technical Solution 17 or 18, a first switch element including a first switch part and a first other switch part, a second switch element including a second switch part and a second other switch part, and is provided with the electric circuit includes a first terminal and a second terminal, the first terminal is electrically connected to the first part, the second terminal is electrically connected to the second other part, the second terminal is electrically connected to the first other switch part and the second switch part, and is a power conversion circuit.

[0084] (Technical Solution 20) It further includes a second capacitor including a second capacitor terminal and a second other capacitor terminal, the second capacitor terminal is connected to the first switch part, the second other capacitor terminal is connected to the first terminal, and is the power conversion circuit described in Technical Solution 19.

[0085] According to an embodiment, a magnetic component, an electric circuit, and a power conversion circuit capable of reducing losses can be provided.

[0086] As described above, the embodiments of the present invention have been described with reference to specific examples. However, the present invention is not limited to these specific examples. For example, regarding the specific configurations of each element such as the core part, core, conductive member, capacitor, and switch element included in the magnetic component, electric circuit, and power conversion circuit, those skilled in the art can appropriately select from the known range to implement the present invention in the same way, and as long as the same effects can be obtained, it is included in the scope of the present invention.

[0087] In addition, a combination of any two or more elements of each specific example within a technically possible range is also included in the scope of the present invention as long as it encompasses the gist of the present invention.

[0088] In addition, based on the magnetic component, electric circuit, and power conversion circuit described above as embodiments of the present invention, all magnetic components, electric circuits, and power conversion circuits that those skilled in the art can appropriately design and modify and implement also belong to the scope of the present invention as long as they encompass the gist of the present invention.

[0089] In addition, within the scope of the idea of the present invention, those skilled in the art can conceive of various modification examples and correction examples, and it is understood that those modification examples and correction examples also belong to the scope of the present invention.

[0090] Although some embodiments of the present invention have been described, these embodiments are presented as examples and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the gist of the invention. These embodiments and their modifications are included in the scope and gist of the invention, and are also included in the invention described in the claims and its equivalent scope.

Description of Reference Numerals

[0091] 10, 20: First and second conductive members, 11, 12: First and second conductive portions, 11a, 12a: First and second portions, 11b, 12b: First and second other portions, 23, 24: Third and fourth conductive portions, 23a, 24a: Third and fourth portions, 23b, 24b: Third and fourth other portions, 30: Magnetic core portion, 31 - 34: First to fourth cores, 38a, 38b: First and second base portions, 41 - 43: First to third capacitors, 41a - 43a: First to third capacitor terminals, 41b - 43b: First to third other capacitor terminals, 61 - 64: First to fourth rectifying elements, 110, 110a - 110d, 119: Magnetic components, 210: Electric circuit, 310 - 313: Power conversion circuit, D1, D2: First and second directions, Dz1: Crossing direction, PL1: First plane, Q1 - Q4: First to fourth switching elements, Q1a, Q2a: First and second switch portions, Q1b, Q2b: First and second other switch portions, S1 - S4: First to fourth connection points, T1, T2: First and second terminals, Tf: Period, Vin: First voltage, Vout: Second voltage, d1 - d4: First to fourth distances, i1, i2: First and second currents, i AC : Second partial current, i DC : First partial current, i L : Input current, tm: Time, Φ1 - Φ4: First to fourth magnetic fluxes

Claims

1. A magnetic core part including a first core, a second core, a third core, and a fourth core, wherein a first direction from the first core to the fourth core intersects a second direction from the first core to the third core, a direction from the third core to the second core is along the first direction, a direction from the fourth core to the second core is along the second direction, a first distance between the first core and the fourth core is the same as a third distance between the first core and the third core, the first distance is the same as a second distance between the third core and the second core, and the first distance is the same as a fourth distance between the fourth core and the second core; the magnetic core part; A first conductive member including a first conductive portion and a second conductive portion, wherein the first conductive portion is wound around the first core in a first winding direction, the second conductive portion is wound around the second core in a second winding direction opposite to the first winding direction; the first conductive member; A second conductive member including a third conductive portion and a fourth conductive portion, wherein the third conductive portion is wound around the third core in a third winding direction, the fourth conductive portion is wound around the fourth core in a fourth winding direction opposite to the third winding direction; the second conductive member; A magnetic component comprising the above.

2. The first conductive member is configured to function as a DC inductor, The second conductive member is configured to function as an AC inductor. The magnetic component according to Claim 1.

3. The first conductive portion is continuously wound around the first core a first number of times, The second conductive portion is continuously wound around the second core a second number of times, The first number of times is the same as the second number of times, The third conductive portion is continuously wound around the third core a third number of times, The fourth conductive portion is continuously wound around the fourth core a fourth number of times, The third number of times is the same as the fourth number of times. The magnetic component according to Claim 1.

4. The first number of times is greater than the third number of times. The magnetic component according to Claim 3.

5. A plurality of the first conductive portions are provided, A plurality of the second conductive portions are provided, One of the plurality of first conductive portions is between one of the plurality of second conductive portions and another one of the plurality of second conductive portions. One of the plurality of second conductive parts is between one of the plurality of first conductive parts and another one of the plurality of first conductive parts, according to any one of claims 1 to 4, the magnetic component.

6. A plurality of the third conductive parts are provided, A plurality of the fourth conductive parts are provided, One of the plurality of third conductive parts is between one of the plurality of fourth conductive parts and another one of the plurality of fourth conductive parts, One of the plurality of fourth conductive parts is between one of the plurality of third conductive parts and another one of the plurality of third conductive parts, according to claim 5, the magnetic component.

7. The magnetic component according to claim 1, A first capacitor, Comprising, The first capacitor is configured to be coupled to the second conductive member, an electrical circuit.

8. The first conductive part includes a first part and a first other part, The second conductive part includes a second part and a second other part, The third conductive part includes a third part and a third other part, The fourth conductive part includes a fourth part and a fourth other part, The first capacitor includes a first capacitor terminal and a first other capacitor terminal, The first other part is connected to the second part, The third other part is connected to the fourth part, The second other part is connected to the fourth other part, The first other capacitor terminal is connected to the third part, The first capacitor terminal is connected to the first part, according to claim 7, the electrical circuit.

9. Let the switching frequency be f ｓｗ and when the inductor of the second conductive member is L ＡＣ the capacitance C of the first capacitor ｈｆ is 1 / {4π ２ ·(f ｓｗ ) ２ ·L ＡＣ}, that is, 1 / 5 or less of 1 / {4π·(f)·L}. The electric circuit according to claim 8

10. The electrical circuit according to claim 8, A first switch element including a first switch part and a first other switch part, A second switch element including a second switch part and a second other switch part, Comprising, The electrical circuit includes a first terminal and a second terminal, The first terminal is electrically connected to the first part, The second terminal is electrically connected to the second other part, The second terminal is electrically connected to the first other switch part and the second switch part, a power conversion circuit.

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