WO2024089738A1 - Magnetic component and power conversion device - Google Patents

Magnetic component and power conversion device Download PDF

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Publication number
WO2024089738A1
WO2024089738A1 PCT/JP2022/039509 JP2022039509W WO2024089738A1 WO 2024089738 A1 WO2024089738 A1 WO 2024089738A1 JP 2022039509 W JP2022039509 W JP 2022039509W WO 2024089738 A1 WO2024089738 A1 WO 2024089738A1
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Prior art keywords
coupling portion
coupling
winding
connection terminal
coupling part
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PCT/JP2022/039509
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French (fr)
Japanese (ja)
Inventor
暁峰 伍
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Tdk株式会社
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Application filed by Tdk株式会社 filed Critical Tdk株式会社
Priority to PCT/JP2022/039509 priority Critical patent/WO2024089738A1/en
Publication of WO2024089738A1 publication Critical patent/WO2024089738A1/en

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F30/00—Fixed transformers not covered by group H01F19/00
    • H01F30/06—Fixed transformers not covered by group H01F19/00 characterised by the structure
    • H01F30/10—Single-phase transformers

Definitions

  • the present invention relates to magnetic components and power conversion devices equipped with magnetic components.
  • Power conversion devices include resonant converters that are configured using a resonant coil and a transformer. There is a demand for power conversion devices that can reduce component and mounting costs and miniaturize the device.
  • Patent Document 1 discloses a magnetic component that combines a resonant coil and a transformer.
  • a magnetic component includes a magnetic core, a first winding, and one or more second windings.
  • the magnetic core has two base portions facing each other, and a first coupling portion, a second coupling portion, a third coupling portion, a fourth coupling portion, and a fifth coupling portion that are disposed within the facing surfaces of the two base portions and magnetically couple the two base portions.
  • the first coupling portion and the second coupling portion are arranged in this order in a first direction, the third coupling portion and the fourth coupling portion are arranged in this order in the first direction, the first coupling portion and the third coupling portion are arranged in this order in the second direction, the second coupling portion and the fourth coupling portion are arranged in this order in the second direction, and the fifth coupling portion is arranged to surround the entire first coupling portion, the second coupling portion, the third coupling portion, and the fourth coupling portion.
  • the first winding is wound around one or more of the first coupling, the second coupling, the third coupling, and the fourth coupling.
  • the one or more second windings are wound around one or more of the first coupling, the second coupling, the third coupling, and the fourth coupling.
  • the power conversion device includes the magnetic component, a switching circuit, a rectifier circuit, and a smoothing circuit.
  • the switching circuit is connected to the first winding of the magnetic component and has one or more switching elements.
  • the rectifier circuit is connected to the one or more second windings of the magnetic component.
  • the smoothing circuit is connected to the rectifier circuit.
  • the magnetic components and power conversion device according to one embodiment of the present invention can reduce losses due to leakage flux.
  • FIG. 1 is a circuit diagram illustrating a configuration example of a power conversion device according to an embodiment of the present invention.
  • FIG. 2 is an explanatory diagram illustrating a configuration example of the transformer illustrated in FIG. 1 .
  • 3 is an explanatory diagram illustrating one configuration example of a winding in the transformer illustrated in FIG. 2.
  • FIG. 4 is an explanatory diagram illustrating a connection example of the transformer illustrated in FIG. 3 .
  • 2 is a timing waveform diagram showing an example of the waveform of a gate signal shown in FIG. 1 .
  • FIG. 2 is an explanatory diagram illustrating one operation state of the power conversion device shown in FIG. 1 . 1.
  • FIG. 4 is an explanatory diagram illustrating another operating state of the power conversion device shown in FIG.
  • FIG. 4 is an explanatory diagram illustrating an example of magnetic flux at the joint portion illustrated in FIG. 3 .
  • 5 is an explanatory diagram illustrating another example of the magnetic flux at the joint shown in FIG. 3 .
  • FIG. 11 is an explanatory diagram illustrating a configuration example of a winding in a transformer according to a modified example. 9 is an explanatory diagram showing the relationship between the windings shown in FIG. 3 and the windings shown in FIG. 8 .
  • FIG. 13 is an explanatory diagram illustrating a configuration example of a transformer according to another modified example.
  • FIG. 11 is an explanatory diagram illustrating a configuration example of a winding in the transformer illustrated in FIG. 10 .
  • FIG. 13 is an explanatory diagram illustrating a configuration example of a transformer according to another modified example.
  • FIG. 13 is a circuit diagram illustrating a configuration example of a power conversion device according to another modified example.
  • FIG. 13 is a circuit diagram illustrating a configuration example of a power conversion device according to another modified example.
  • FIG. 15 is an explanatory diagram illustrating a configuration example of a winding in the transformer illustrated in FIG. 14 .
  • FIG. 16 is an explanatory diagram illustrating a connection example of the transformer illustrated in FIG. 15 .
  • FIG. 1 shows an example of a configuration of a power conversion device 1 including a magnetic component according to an embodiment of the present invention.
  • the power conversion device 1 is an LLC resonant converter that transforms DC power.
  • the power conversion device 1 includes terminals T11, T12 and terminals T21, T22.
  • the terminals T11, T12 are connected to a DC power source PDC, and the terminals T21, T22 are connected to a load LD.
  • the power conversion device 1 is configured to convert DC power supplied from the DC power source PDC and supply the converted DC power to the load LD.
  • the power conversion device 1 includes a capacitor 11, a switching circuit 12, a capacitor 15, a transformer 20, a rectifier circuit 17, and a smoothing circuit 18.
  • the capacitor 11, the switching circuit 12, and the capacitor 15 form the primary side circuit of the power conversion device 1, and the rectifier circuit 17 and the smoothing circuit 18 form the secondary side circuit of the power conversion device 1.
  • One end of the capacitor 11 is connected to a voltage line L11 that is connected to a terminal T11, and the other end is connected to a reference voltage line L12 that is connected to a terminal T12.
  • the switching circuit 12 is configured to convert the DC voltage supplied from the DC power supply PDC into an AC voltage.
  • the switching circuit 12 has transistors 13 and 14.
  • each of the transistors 13 and 14 is an N-type FET (Field Effect Transistor).
  • the drain of the transistor 13 is connected to the voltage line L11, the gate is supplied with a gate signal G1 from a control unit (not shown), and the source is connected to the drain of the transistor 14 and one end of the capacitor 15.
  • the drain of the transistor 14 is connected to the source of the transistor 13 and one end of the capacitor 15, the gate is supplied with a gate signal G2 from a control unit (not shown), and the source is connected to the reference voltage line L12.
  • the switching circuit 12 is not limited to this configuration, and various circuits having one or more switching elements can be used.
  • Capacitor 15 is a resonant capacitor in the LLC resonant converter, with one end connected to the source of transistor 13 and the drain of transistor 14, and the other end connected to transformer 20.
  • the transformer 20 is configured to insulate the primary circuit and the secondary circuit from a DC perspective and to connect them from an AC perspective, convert the AC voltage supplied from the primary circuit at the transformation ratio R of the transformer 20, and supply the converted AC voltage to the secondary circuit.
  • the transformer 20 has connection terminals Tp1, Tp2, Ts11, Ts12, Ts21, Ts22, Ts31, Ts32, Ts41, and Ts42, windings Wp1 and Wp2, and windings Ws1, Ws2, Ws3, and Ws4.
  • connection terminal Tp1 is connected to the other end of the capacitor 15, and the connection terminal Tp2 is connected to the reference voltage line L12.
  • connection terminals Ts11, Ts21, Ts31, and Ts41 are connected to the reference voltage line L22 via the rectifier circuit 17, and the connection terminals Ts12, Ts22, Ts32, and Ts42 are connected to the voltage line L21.
  • Winding Wp1 is a resonant coil in the LLC resonant converter, with one end connected to connection terminal Tp1 and the other end connected to one end of winding Wp2.
  • Winding Wp2 is the primary winding of transformer 20, with one end connected to the other end of winding Wp1 and the other end connected to connection terminal Tp2.
  • windings Wp1 and Wp2 as a whole are also referred to as winding Wp.
  • Windings Ws1 to Ws4 are the secondary windings of transformer 20.
  • One end of winding Ws1 is connected to connection terminal Ts11, and the other end is connected to connection terminal Ts12.
  • One end of winding Ws2 is connected to connection terminal Ts21, and the other end is connected to connection terminal Ts22.
  • One end of winding Ws3 is connected to connection terminal Ts31, and the other end is connected to connection terminal Ts32.
  • One end of winding Ws4 is connected to connection terminal Ts41, and the other end is connected to connection terminal Ts42.
  • FIG. 2 shows an example of the configuration of the transformer 20.
  • FIG. 2 also shows a cross-sectional view of the transformer 20 as viewed in the direction of the arrows I-I and II-II.
  • the transformer 20 is a planar transformer.
  • the transformer 20 has a magnetic core 100 and a substrate 200.
  • the magnetic core 100 has base portions 101, 102 and four connecting portions 111, 112, 113, 114, 115.
  • the base portions 101, 102 are arranged so as to face each other in the Z direction.
  • the base portions 101, 102 have a substantially square shape in the XY plane.
  • the connecting portions 111-115 are arranged on the opposing surfaces of the two base portions 101, 102 and are provided so as to magnetically connect these two base portions 101, 102.
  • the connecting portions 111 and 112 are arranged side by side in this order, and the connecting portions 113 and 114 are arranged side by side in this order.
  • the connecting portions 111 and 113 are arranged side by side in this order, and the connecting portions 112 and 114 are arranged side by side in this order.
  • the connecting portion 115 is provided so as to surround the connecting portions 111 to 114 in the XY plane.
  • the connecting portion 115 includes two connecting portions 115A and 115B.
  • the connecting portion 115A is provided on the side in the Y direction where the connecting portions 111 and 112 are provided, and the connecting portion 115B is provided on the side in the Y direction where the connecting portions 113 and 114 are provided.
  • the cross-sectional area of the joints 111 and 114 is smaller than the cross-sectional area of the joints 112 and 113.
  • this is not limited to this, and the cross-sectional areas of the joints 111 to 114 may be equal to each other.
  • a gap GAP is provided near the center in the Z direction in each of the joints 111 to 115.
  • a gap GAP may be provided between the joint 111 and the base part 101 at the end of the joint 111 in the Z direction, or a gap GAP may be provided between the joint 111 and the base part 102 at the end of the joint 111 in the opposite direction to the Z direction.
  • the width of the gap GAP of the connecting parts 111 and 114 can be made smaller than the width of the gap GAP of the connecting parts 112 and 113. That is, in this example, since the cross-sectional area of the connecting parts 111 and 114 is smaller than the cross-sectional area of the connecting parts 112 and 113, the width of the gap GAP of the connecting parts 111 to 114 can be adjusted so that the magnetic resistances of the connecting parts 111 to 114 are approximately equal to each other. Furthermore, the width of the gap GAP of the connecting part 115 can be set to a value between the width of the gap GAP of the connecting parts 111 and 114 and the width of the gap GAP of the connecting parts 112 and 113. However, this is not limited to this, and the width of the gap GAP of the connecting parts 111 to 115 can be set appropriately.
  • the substrate 200 is a multi-layer substrate (a three-layer substrate in this example) on which a coil pattern is formed. Through holes are provided in the substrate 200 at positions corresponding to the coupling parts 111-115 of the magnetic core 100, and the substrate 200 is sandwiched between the base parts 101 and 102.
  • the substrate 200 is provided with windings Wp1, Wp2, and windings Ws1, Ws2, Ws3, and Ws4.
  • FIG. 3 shows an example of the configuration of the windings in the substrate 200, with FIG. 3(A) showing the first layer, wiring layer LA1, FIG. 3(B) showing the second layer, wiring layer LA2, and FIG. 3(C) showing the third layer, wiring layer LA3.
  • the wiring layers LA1 to LA3 are provided in this order in the layer direction of the substrate 200.
  • FIG. 4 shows an example of the connection of the winding Wp (windings Wp1, Ws1) and windings Ws1 to Ws4 in the power conversion device 1.
  • the winding Wp is provided in the wiring layer LA1 (Fig. 3(A)), the windings Ws1 and Ws2 are provided in the wiring layer LA2 (Fig. 3(B)), and the windings Ws3 and Ws4 are provided in the wiring layer LA3 (Fig. 3(C)). Note that this is not limited to this, and the winding Wp and the windings Ws1 to Ws4 may be formed in any of the wiring layers LA1 to LA3.
  • the winding Wp is wound around the four coupling parts 111-114. Specifically, in the direction from connection terminal Tp1 to connection terminal Tp2, the winding Wp is wound around the entire coupling parts 111-114, coupling part 113, coupling part 114, coupling part 112, and coupling part 111 in that order.
  • the portion of the winding Wp that is wound around the entire coupling parts 111-114 corresponds to the winding Wp1
  • the portion that is wound around each of the coupling parts 111-114 corresponds to the winding Wp2.
  • the portion that is wound around the entire coupling parts 111-114 has weak coupling with each of the windings Ws1-Ws4, and therefore functions as a resonant coil rather than as a primary winding of the transformer 20.
  • the winding Wp is wound once clockwise around all of coupling parts 111 to 114, once clockwise around each of coupling parts 112 and 113, and once counterclockwise around each of coupling parts 111 and 114.
  • the winding Wp is configured to make partial detours via, for example, vias and wiring provided in other wiring layers.
  • the winding Ws1 is wound around the two coupling parts 113 and 114, and the winding Ws2 is wound around the two coupling parts 111 and 112.
  • the winding Ws1 is wound once clockwise around the coupling part 113 in the direction from the connection terminal Ts11 to the connection terminal Ts12, and once counterclockwise around the coupling part 114.
  • the winding Ws2 is wound once counterclockwise around the coupling part 111 in the direction from the connection terminal Ts21 to the connection terminal Ts22, and once clockwise around the coupling part 112.
  • the winding Ws3 is wound around the two coupling parts 113 and 114, and the winding Ws4 is wound around the two coupling parts 111 and 112.
  • the winding Ws3 is wound once counterclockwise around the coupling part 113 in the direction from the connection terminal Ts31 to the connection terminal Ts32, and once clockwise around the coupling part 114.
  • the winding Ws4 is wound once clockwise around the coupling part 111 in the direction from the connection terminal Ts41 to the connection terminal Ts42, and once counterclockwise around the coupling part 112.
  • the rectifier circuit 17 ( Figure 1) is configured to rectify the AC voltages output from each of the windings Ws1 to Ws4 of the transformer 20.
  • the windings Ws1 to Ws4 of the transformer 20 and the rectifier circuit 17 form a so-called center-tap type circuit.
  • the rectifier circuit 17 has diodes D1, D2, D3, and D4.
  • the anode of the diode D1 is connected to the reference voltage line L22, and the cathode is connected to the connection terminal Ts11 of the transformer 20.
  • the anode of the diode D2 is connected to the reference voltage line L22, and the cathode is connected to the connection terminal Ts21 of the transformer 20.
  • the anode of the diode D3 is connected to the reference voltage line L22, and the cathode is connected to the connection terminal Ts31 of the transformer 20.
  • the anode of the diode D4 is connected to the reference voltage line L22, and the cathode is connected to the connection terminal Ts41 of the transformer 20.
  • the diodes D1 to D4 are connected to the reference voltage line L22, but instead, they may be connected to, for example, the voltage line L21.
  • the smoothing circuit 18 is configured to smooth the voltage output from the rectifier circuit 17.
  • the smoothing circuit 18 has a capacitor 19. One end of the capacitor 19 is connected to the voltage line L21, and the other end is connected to the reference voltage line L22.
  • the smoothing circuit 18 is configured to smooth using only the capacitor 19, but this is not limited to this.
  • an inductor may be further provided and smoothing may be performed using the inductor and the capacitor 19. This inductor is provided, for example, between one end of the capacitor 19 and the connection terminals Ts12, Ts22, Ts32, and Ts42 of the transformer 20.
  • the transformer 20 corresponds to a specific example of a "magnetic component” in this disclosure.
  • the magnetic core 100 corresponds to a specific example of a “magnetic core” in this disclosure.
  • the coupling portion 111 corresponds to a specific example of a "first coupling portion” in this disclosure.
  • the coupling portion 112 corresponds to a specific example of a “second coupling portion” in this disclosure.
  • the coupling portion 113 corresponds to a specific example of a "third coupling portion” in this disclosure.
  • the coupling portion 114 corresponds to a specific example of a "fourth coupling portion” in this disclosure.
  • the coupling portion 115 corresponds to a specific example of a "fifth coupling portion” in this disclosure.
  • the coupling portions 115A and 115B correspond to a specific example of a "multiple partial coupling portions” in this disclosure.
  • the winding Wp corresponds to a specific example of a "first winding” in this disclosure.
  • the connection terminal Tp1 corresponds to a specific example of a "first connection terminal” in this disclosure.
  • the connection terminal Tp2 corresponds to a specific example of a “second connection terminal” in this disclosure.
  • the windings Ws1 to Ws4 correspond to a specific example of a "second winding” in this disclosure.
  • the connection terminal Ts21 corresponds to a specific example of a "third connection terminal” in this disclosure.
  • the connection terminal Ts22 corresponds to a specific example of a "fourth connection terminal” in this disclosure.
  • the switching circuit 12 corresponds to a specific example of a "switching circuit” in this disclosure.
  • the transistors 13 and 14 correspond to a specific example of a “switching element” in this disclosure.
  • the rectifier circuit 17 corresponds to a specific example of a “rectifier circuit” in this disclosure.
  • the smoothing circuit 18 corresponds to a specific example of a “smoothing circuit” in this disclosure.
  • the switching circuit 12 generates an AC voltage based on a DC voltage supplied from a DC power supply PDC by transistors 13 and 14 performing switching operations.
  • the transformer 20 converts this AC voltage with a transformation ratio R.
  • the rectifier circuit 17 rectifies the AC voltages output from the windings Ws1 to Ws4 of the transformer 20.
  • the smoothing circuit 18 smoothes the voltage output from the rectifier circuit 17.
  • FIG. 5 shows an example of the waveforms of gate signals G1 and G2 in the power conversion device 1.
  • Fig. 6A shows one operating state of the power conversion device 1
  • Fig. 6B shows another operating state of the power conversion device 1.
  • the transistors 13 and 14 are shown with symbols representing their operating states (on or off).
  • Figs. 7A and 7B show the directions of magnetic flux at the coupling parts 111 to 115 of the magnetic core 100.
  • the gate signal G2 transitions from high to low. This causes both transistors 13 and 14 to be in the off state. During the period from timing t0 to t1 (the so-called dead time), both transistors 13 and 14 are in the off state.
  • gate signal G1 transitions from low to high. This causes transistor 13 to turn on. During the period from timing t1 to t2, transistor 13 maintains the on state and transistor 14 maintains the off state.
  • the direction of magnetic flux at couplings 111 and 114 is the Z direction, and the direction of magnetic flux at couplings 112 and 113 is opposite to the Z direction.
  • the direction of magnetic flux at coupling 115 is the Z direction.
  • gate signal G1 transitions from high to low. This causes transistor 13 to turn off. During the period from timing t2 to t3 (the so-called dead time), both transistors 13 and 14 are in the off state.
  • gate signal G2 transitions from low to high. This causes transistor 14 to turn on. During the period from timing t3 to t4, transistor 13 remains in the off state, and transistor 14 remains in the on state.
  • the direction of magnetic flux at couplings 111 and 114 is opposite the Z direction, and the direction of magnetic flux at couplings 112 and 113 is the Z direction.
  • the direction of magnetic flux at coupling 115 is opposite the Z direction.
  • gate signal G2 transitions from high to low. This turns transistor 14 off. During the period from timing t4 to t5 (the so-called dead time), both transistors 13 and 14 are in the off state.
  • the gate signal G1 transitions from low to high. This causes the transistor 13 to turn on.
  • the power conversion device 1 transforms and outputs the DC power supplied from the DC power source PDC.
  • the power conversion device 1 controls the output voltage to be constant by controlling the operation of transistors 13, 14 using, for example, PFM (Pulse Frequency Modulation).
  • PFM Pulse Frequency Modulation
  • the power conversion device 1 may also control the output voltage to be constant by controlling the operation of transistors 13, 14 using PWM (Pulse Width Modulation).
  • the transformer 20 is provided with two base parts 101, 102 facing each other, and a magnetic core 100 that is arranged on the facing surfaces of the two base parts 101, 102 and has a first coupling part (coupling part 111), a second coupling part (coupling part 112), a third coupling part (coupling part 113), a fourth coupling part (coupling part 114), and a fifth coupling part (coupling part 115) that magnetically couple the two base parts 101, 102.
  • a first coupling part (coupling part 111), a second coupling part (coupling part 112), a third coupling part (coupling part 113), a fourth coupling part (coupling part 114), and a fifth coupling part (coupling part 115) that magnetically couple the two base parts 101, 102.
  • the first and second coupling parts are arranged in this order in the first direction (X direction), the third and fourth coupling parts are arranged in this order in the first direction, the first and third coupling parts are arranged in this order in the second direction (Y direction), the second and fourth coupling parts are arranged in the second direction, and the fifth coupling part surrounds the first, second, third, and fourth coupling parts in their entirety.
  • the transformer 20 is provided with a first winding (winding Wp) wound around one or more of the first, second, third, and fourth coupling parts, and one or more second windings (windings Ws1 to Ws4) wound around one or more of the first, second, third, and fourth coupling parts. This allows the transformer 20 to reduce losses due to leakage flux.
  • a leg corresponding to the resonant coil is provided in the center of the transformer. Since this leg is provided in the center of the transformer, magnetic flux is concentrated. Leakage magnetic flux from this leg spreads to the vicinity of the winding corresponding to the resonant coil that is wound around this leg. Therefore, this leakage magnetic flux generates eddy currents in the wiring pattern of this winding, resulting in energy loss (fringing loss). In addition, heat is generated in a concentrated manner in the wiring pattern of this winding.
  • a coupling part 115 instead of the leg provided in the center of the transformer, a coupling part 115 that surrounds the coupling parts 111 to 114 is provided.
  • the coupling part 115 is provided so as to surround the entire coupling parts 111 to 114, so that the magnetic flux is dispersed.
  • the coupling part 115 is provided at the end of the transformer 20, not in the center of the transformer 20, so that the cross-sectional area in the XY plane can be increased and the magnetic flux density can be reduced. Therefore, the loss due to the leakage magnetic flux from the coupling part 115 can be reduced. This helps prevent concentrated heat generation within the transformer 20.
  • a magnetic core that has two base parts facing each other, and a first coupling part, a second coupling part, a third coupling part, a fourth coupling part, and a fifth coupling part that are arranged on the facing surfaces of the two base parts and magnetically couple the two base parts.
  • the first coupling part and the second coupling part are arranged in this order in the first direction
  • the third coupling part and the fourth coupling part are arranged in this order in the first direction
  • the first coupling part and the third coupling part are arranged in the second direction
  • the second coupling part and the fourth coupling part are arranged in the second direction
  • the fifth coupling part surrounds the entire first coupling part, the second coupling part, the third coupling part, and the fourth coupling part.
  • a first winding is wound around one or more of the first coupling portion, the second coupling portion, the third coupling portion, and the fourth coupling portion
  • one or more second windings are wound around one or more of the first coupling portion, the second coupling portion, the third coupling portion, and the fourth coupling portion, thereby making it possible to reduce loss due to leakage magnetic flux.
  • the winding Wp is wound around the coupling parts 111 to 114 as shown in Fig. 3, but the present invention is not limited to this, and instead, for example, the winding may be wound as in the transformer 20A shown in Fig. 8.
  • the winding Wp is wound around the coupling parts 112 and 113 in the direction from the connection terminal Tp1 to the connection terminal Tp2.
  • the winding Wp is wound clockwise twice around the entire coupling parts 112 and 113 in the direction from the connection terminal Tp1 to the connection terminal Tp2.
  • This winding method of the winding Wp is equivalent to the winding method of the winding Wp in the transformer 20 according to the above embodiment (Fig. 3), as will be described below.
  • FIG. 9(A) shows the winding Wp of the transformer 20 according to the above embodiment
  • FIG. 9(B) shows the winding Wp of the transformer 20A according to this modified example.
  • the arrow shown on the winding Wp indicates the direction of the current Ip when the current Ip flows from the connection terminal Tp1 to the connection terminal Tp2.
  • the winding Wp can be changed from the winding shown in FIG. 9(A) to the winding shown in FIG. 9(B).
  • FIG. 9(B) for example, around the joint 111, an upward current flows between the joint 111 and the joint 112, as in FIG. 9(A), and a leftward current flows between the joint 111 and the joint 113.
  • FIG. 9(B) for example, around the joint 114, a downward current flows between the joint 113 and the joint 114, as in FIG. 9(A), and a rightward current flows between the joint 112 and the joint 114. Therefore, the winding method of the winding Wp of the transformer 20A shown in FIG. 9(B) is equivalent to the winding method of the winding Wp of the transformer 20 shown in FIG. 9(A).
  • the coupling portion 115 includes two coupling portions 115A and 115B, but this is not limited thereto. Instead, for example, as in the transformer 20B shown in Figs. 10 and 11, the coupling portion 115 may include three or more coupling portions (four coupling portions 115A to 115D in this example).
  • the coupling portions 115A to 115D correspond to a specific example of "plural partial coupling portions" in this disclosure.
  • the cross-sectional area of the coupling parts 111 and 114 in the XY plane is smaller than the cross-sectional area of the coupling parts 112 and 113, but this is not limited to this. Instead, the cross-sectional areas of the coupling parts 111 to 114 may be equal to each other, as in the transformer 20C shown in Figure 12, for example.
  • the rectifier circuit 17 is configured using diodes D1 to D4, but this is not limited to this. Instead, for example, the rectifier circuit may be configured using transistors to perform so-called synchronous rectification.
  • the switching circuit 12 having two transistors 13 and 14 is provided, but the present invention is not limited to this.
  • a switching circuit 12D having four transistors 23 to 26 may be provided as in a power conversion device 1D shown in FIG. 13.
  • the switching circuit 12D is a so-called full-bridge type circuit and has transistors 23 to 26.
  • each of the transistors 23 to 26 is an N-type FET.
  • the drain of the transistor 23 is connected to the voltage line L11, the gate is supplied with a gate signal G1 from a control unit (not shown), and the source is connected to the drain of the transistor 24 and one end of the capacitor 15.
  • the drain of the transistor 24 is connected to the source of the transistor 23 and one end of the capacitor 15, the gate is supplied with a gate signal G2 from a control unit (not shown), and the source is connected to the reference voltage line L12.
  • the drain of the transistor 25 is connected to the voltage line L11, the gate is supplied with a gate signal G3 from a control unit (not shown), and the source is connected to the drain of the transistor 26 and the connection terminal Tp2 of the transformer 20.
  • the drain of the transistor 26 is connected to the source of the transistor 25 and the connection terminal Tp2 of the transformer 20, the gate receives a gate signal G4 from a control unit (not shown), and the source is connected to the reference voltage line L12.
  • the rectifier circuit 17 and the transformer 20 constitute a center tap type circuit as shown in Fig. 1, but the present invention is not limited to this. The present modification will be described in detail below.
  • FIG. 14 shows an example of the configuration of a power conversion device 1E according to this modified example.
  • the power conversion device 1E includes a switching circuit 12D, a transformer 20E, and a rectifier circuit 17E.
  • the switching circuit 12D is a so-called full-bridge type circuit, and is the same as the circuit shown in Figure 13.
  • the transformer 20E has connection terminals Tp1, Tp2, Ts1A, Ts1B, Ts2A, and Ts2B, windings Wp1, Wp2, and windings Ws11 and Ws12.
  • the connection terminal Tp1 is connected to the other end of the capacitor 15, and the connection terminal Tp2 is connected to the source of the transistor 25 and the drain of the transistor 26.
  • the connection terminals Ts1A, Ts1B, Ts2A, and Ts2B are connected to the rectifier circuit 17E.
  • the windings Ws11 and Ws12 are secondary windings of the transformer 20E. One end of the winding Ws11 is connected to the connection terminal Ts1A, and the other end is connected to the connection terminal Ts1B.
  • winding Ws12 One end of the winding Ws12 is connected to the connection terminal Ts2A, and the other end is connected to the connection terminal Ts2B.
  • the windings Ws11 and Ws12 correspond to a specific example of a "second winding" in this disclosure.
  • Figure 15 shows an example of the configuration of the windings of transformer 20E, where Figure 15(A) shows the first layer, wiring layer LA1, and Figure 15(B) shows the second layer, wiring layer LA2.
  • Figure 16 shows an example of the connection of winding Wp (windings Wp1, Ws1) and windings Ws11, Ws12 in power conversion device 1E.
  • winding Wp is provided in wiring layer LA1 ( Figure 15(A))
  • windings Ws11, Ws12 are provided in wiring layer LA2 ( Figure 15(B)).
  • winding Ws11 is wound around two coupling parts 113, 114
  • winding Ws12 is wound around two coupling parts 111, 112.
  • the winding Ws11 is wound once clockwise around the coupling portion 113 in the direction from the connection terminal Ts1A to the connection terminal Ts1B, and once counterclockwise around the coupling portion 114.
  • the winding Ws12 is wound once counterclockwise around the coupling portion 111 in the direction from the connection terminal Ts2A to the connection terminal Ts2B, and once clockwise around the coupling portion 112.
  • the rectifier circuit 17E (FIG. 14) is a so-called full-bridge type rectifier circuit, and has diodes D11, D12, D13, and D14.
  • the anode of the diode D11 is connected to the cathode of the diode D12 and the connection terminals Ts1A and Ts2A of the transformer 20E, and the cathode is connected to the voltage line L21.
  • the anode of the diode D12 is connected to the reference voltage line L22, and the cathode is connected to the anode of the diode D11 and the connection terminals Ts1A and Ts2A of the transformer 20E.
  • the anode of the diode D13 is connected to the cathode of the diode D14 and the connection terminals Ts1B and Ts2B of the transformer 20E, and the cathode is connected to the voltage line L21.
  • the anode of the diode D14 is connected to the reference voltage line L22, and the cathode is connected to the anode of the diode D13 and the connection terminals Ts1B and Ts2B of the transformer 20E.
  • multiple secondary windings, Ws1 to Ws4, are provided on the transformer 20, but this is not limited thereto, and for example, a single secondary winding may be provided.
  • the windings are formed using the wiring layers of a multi-layer board, but this is not limited to this, and the windings may also be formed using wire.
  • a magnetic core having two base parts facing each other, and a first coupling part, a second coupling part, a third coupling part, a fourth coupling part, and a fifth coupling part that are arranged on opposing surfaces of the two base parts and magnetically couple the two base parts, the first coupling part and the second coupling part being arranged side by side in this order in a first direction, the third coupling part and the fourth coupling part being arranged side by side in this order in the first direction, the first coupling part and the third coupling part being arranged side by side in a second direction, the second coupling part and the fourth coupling part being arranged side by side in the second direction, and the fifth coupling part being provided to surround the entirety of the first coupling part, the second coupling part, the third coupling part, and the fourth coupling part; a first winding wound around one or more of the first coupling portion, the second coupling portion, the third coupling portion, and the fourth coupling portion; and one or more second windings wound around one or more of
  • first winding has, in a direction from the first connection terminal toward the second connection terminal, a first portion wound in a first winding direction around the first coupling portion, the second coupling portion, the third coupling portion, and the fourth coupling portion, and a second portion wound in a second winding direction around each of the first coupling portion and the fourth coupling portion, and wound in the first winding direction around each of the second coupling portion and the third coupling portion.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Dc-Dc Converters (AREA)

Abstract

A magnetic component according to one embodiment of the present invention comprises two opposing base portions, and a first coupling portion, a second coupling portion, a third coupling portion, a fourth coupling portion, and a fifth coupling portion that are disposed within an opposing surface of the two base portions and magnetically couple the two base portions. The first coupling portion and the second coupling portion are arranged along a first direction in the stated order, the third coupling portion and the fourth coupling portion are arranged along the first direction in the stated order, the first coupling portion and the third coupling portion are arranged along a second direction, the second coupling portion and the fourth coupling portion are arranged along the second direction, and the fifth coupling portion comprises: a magnetic core provided so as to surround all of the first coupling portion, the second coupling portion, the third coupling portion, and the fourth coupling portion; a first winding wound around one or more of the first coupling portion, the second coupling portion, the third coupling portion, and the fourth coupling portion; and one or a plurality of second windings wound around one or more of the first coupling portion, the second coupling portion, the third coupling portion, and the fourth coupling portion.

Description

磁性部品および電力変換装置Magnetic components and power conversion devices
　本発明は、磁性部品、および磁性部品を備えた電力変換装置に関する。 The present invention relates to magnetic components and power conversion devices equipped with magnetic components.
　電力変換装置には、共振コイルおよびトランスを用いて構成された共振コンバータがある。電力変換装置では、部品コストや実装コストの低減、装置の小型化が望まれている。例えば、特許文献１には、例えば、共振コイルおよびトランスを複合化した磁性部品が開示されている。 Power conversion devices include resonant converters that are configured using a resonant coil and a transformer. There is a demand for power conversion devices that can reduce component and mounting costs and miniaturize the device. For example, Patent Document 1 discloses a magnetic component that combines a resonant coil and a transformer.
特開２０２１－１５３０９１Patent Publication No. 2021-153091
　磁性部品では、漏れ磁束による損失を低減することが望まれており、さらなる損失の低減が期待されている。 In magnetic components, it is desirable to reduce losses due to leakage flux, and further reductions in losses are expected.
　漏れ磁束による損失を低減することができる磁性部品および電力変換装置を提供することが望ましい。 It is desirable to provide magnetic components and power conversion devices that can reduce losses due to leakage flux.
　本発明の一実施の形態に係る磁性部品は、磁気コアと、第１の巻線と、１または複数の第２の巻線とを備えている。磁気コアは、互いに対向する２つの基体部と、２つの基体部の対向面内に配置され、２つの基体部を磁気結合させる第１の結合部、第２の結合部、第３の結合部、第４の結合部、および第５の結合部を有するものである。第１の結合部および第２の結合部は第１の方向にこの順に並設され、第３の結合部および第４の結合部は第１の方向にこの順で並設され、第１の結合部および第３の結合部は第２の方向に並設され、第２の結合部および第４の結合部は第２の方向に並設され、第５の結合部は、第１の結合部、第２の結合部、第３の結合部、および第４の結合部の全体を囲むように設けられる。第１の巻線は、第１の結合部、第２の結合部、第３の結合部、および第４の結合部のうちの１以上に巻き付けられたものである。１または複数の第２の巻線は、第１の結合部、第２の結合部、第３の結合部、および第４の結合部のうちの１以上に巻き付けられたものである。 A magnetic component according to one embodiment of the present invention includes a magnetic core, a first winding, and one or more second windings. The magnetic core has two base portions facing each other, and a first coupling portion, a second coupling portion, a third coupling portion, a fourth coupling portion, and a fifth coupling portion that are disposed within the facing surfaces of the two base portions and magnetically couple the two base portions. The first coupling portion and the second coupling portion are arranged in this order in a first direction, the third coupling portion and the fourth coupling portion are arranged in this order in the first direction, the first coupling portion and the third coupling portion are arranged in this order in the second direction, the second coupling portion and the fourth coupling portion are arranged in this order in the second direction, and the fifth coupling portion is arranged to surround the entire first coupling portion, the second coupling portion, the third coupling portion, and the fourth coupling portion. The first winding is wound around one or more of the first coupling, the second coupling, the third coupling, and the fourth coupling. The one or more second windings are wound around one or more of the first coupling, the second coupling, the third coupling, and the fourth coupling.
　本発明の一実施の形態に係る電力変換装置は、上記磁性部品と、スイッチング回路と、整流回路と、平滑回路とを備えている。スイッチング回路は、磁性部品の前記第１の巻線に接続され、１または複数のスイッチング素子を有するものである。整流回路は、磁性部品の前記１または複数の第２の巻線に接続されたものである。平滑回路は、整流回路に接続されたものである。 The power conversion device according to one embodiment of the present invention includes the magnetic component, a switching circuit, a rectifier circuit, and a smoothing circuit. The switching circuit is connected to the first winding of the magnetic component and has one or more switching elements. The rectifier circuit is connected to the one or more second windings of the magnetic component. The smoothing circuit is connected to the rectifier circuit.
　本発明の一実施の形態に係る磁性部品および電力変換装置によれば、漏れ磁束による損失を低減することができる。 The magnetic components and power conversion device according to one embodiment of the present invention can reduce losses due to leakage flux.
本発明の実施の形態に係る電力変換装置の一構成例を表す回路図である。1 is a circuit diagram illustrating a configuration example of a power conversion device according to an embodiment of the present invention. 図１に示したトランスの一構成例を表す説明図である。FIG. 2 is an explanatory diagram illustrating a configuration example of the transformer illustrated in FIG. 1 . 図２に示したトランスにおける巻線の一構成例を表す説明図である。3 is an explanatory diagram illustrating one configuration example of a winding in the transformer illustrated in FIG. 2. 図３に示したトランスの一接続例を表す説明図である。FIG. 4 is an explanatory diagram illustrating a connection example of the transformer illustrated in FIG. 3 . 図１に示したゲート信号の一波形例を表すタイミング波形図である。2 is a timing waveform diagram showing an example of the waveform of a gate signal shown in FIG. 1 . 図１に示した電力変換装置における一動作状態を表す説明図である。FIG. 2 is an explanatory diagram illustrating one operation state of the power conversion device shown in FIG. 1 . 図１に示した電力変換装置における他の動作状態を表す説明図である。1. FIG. 4 is an explanatory diagram illustrating another operating state of the power conversion device shown in FIG. 図３に示した結合部における磁束の一例を表す説明図である。4 is an explanatory diagram illustrating an example of magnetic flux at the joint portion illustrated in FIG. 3 . 図３に示した結合部における磁束の他の例を表す説明図である。5 is an explanatory diagram illustrating another example of the magnetic flux at the joint shown in FIG. 3 . 変形例に係るトランスにおける巻線の一構成例を表す説明図である。FIG. 11 is an explanatory diagram illustrating a configuration example of a winding in a transformer according to a modified example. 図３に示した巻線および図８に示した巻線と関係を表す説明図である。9 is an explanatory diagram showing the relationship between the windings shown in FIG. 3 and the windings shown in FIG. 8 . 他の変形例に係るトランスの一構成例を表す説明図である。FIG. 13 is an explanatory diagram illustrating a configuration example of a transformer according to another modified example. 図１０に示したトランスにおける巻線の一構成例を表す説明図である。FIG. 11 is an explanatory diagram illustrating a configuration example of a winding in the transformer illustrated in FIG. 10 . 他の変形例に係るトランスの一構成例を表す説明図である。FIG. 13 is an explanatory diagram illustrating a configuration example of a transformer according to another modified example. 他の変形例に係る電力変換装置の一構成例を表す回路図である。FIG. 13 is a circuit diagram illustrating a configuration example of a power conversion device according to another modified example. 他の変形例に係る電力変換装置の一構成例を表す回路図である。FIG. 13 is a circuit diagram illustrating a configuration example of a power conversion device according to another modified example. 図１４に示したトランスにおける巻線の一構成例を表す説明図である。FIG. 15 is an explanatory diagram illustrating a configuration example of a winding in the transformer illustrated in FIG. 14 . 図１５に示したトランスの一接続例を表す説明図である。FIG. 16 is an explanatory diagram illustrating a connection example of the transformer illustrated in FIG. 15 .
　以下、本発明の実施の形態について、図面を参照して詳細に説明する。 The following describes in detail the embodiments of the present invention with reference to the drawings.
＜実施の形態＞
［構成例］
　図１は、本発明の一実施の形態に係る磁性部品を備えた電力変換装置１の一構成例を表すものである。この電力変換装置１は、直流電力を変圧するＬＬＣ共振コンバータである。電力変換装置１は、端子Ｔ１１，Ｔ１２と、端子Ｔ２１，Ｔ２２とを備えている。端子Ｔ１１，Ｔ１２は直流電源ＰＤＣに接続され、端子Ｔ２１，Ｔ２２は負荷ＬＤに接続される。電力変換装置１は、直流電源ＰＤＣから供給された直流電力を変換し、変換された直流電力を負荷ＬＤに供給するように構成される。 <Embodiment>
[Configuration example]
1 shows an example of a configuration of a power conversion device 1 including a magnetic component according to an embodiment of the present invention. The power conversion device 1 is an LLC resonant converter that transforms DC power. The power conversion device 1 includes terminals T11, T12 and terminals T21, T22. The terminals T11, T12 are connected to a DC power source PDC, and the terminals T21, T22 are connected to a load LD. The power conversion device 1 is configured to convert DC power supplied from the DC power source PDC and supply the converted DC power to the load LD.
　電力変換装置１は、キャパシタ１１と、スイッチング回路１２と、キャパシタ１５と、トランス２０と、整流回路１７と、平滑回路１８とを備えている。キャパシタ１１、スイッチング回路１２、およびキャパシタ１５は、電力変換装置１の一次側回路を構成し、整流回路１７および平滑回路１８は、電力変換装置１の二次側回路を構成する。 The power conversion device 1 includes a capacitor 11, a switching circuit 12, a capacitor 15, a transformer 20, a rectifier circuit 17, and a smoothing circuit 18. The capacitor 11, the switching circuit 12, and the capacitor 15 form the primary side circuit of the power conversion device 1, and the rectifier circuit 17 and the smoothing circuit 18 form the secondary side circuit of the power conversion device 1.
　キャパシタ１１の一端は、端子Ｔ１１に導かれた電圧線Ｌ１１に接続され、他端は、端子Ｔ１２に導かれた基準電圧線Ｌ１２に接続される。 One end of the capacitor 11 is connected to a voltage line L11 that is connected to a terminal T11, and the other end is connected to a reference voltage line L12 that is connected to a terminal T12.
　スイッチング回路１２は、直流電源ＰＤＣから供給された直流電圧を交流電圧に変換するように構成される。スイッチング回路１２は、トランジスタ１３，１４を有している。トランジスタ１３，１４のそれぞれは、この例では、Ｎ型のＦＥＴ（Field Effect Transistor）である。トランジスタ１３のドレインは電圧線Ｌ１１に接続され、ゲートには図示しない制御部からゲート信号Ｇ１が供給され、ソースはトランジスタ１４のドレインおよびキャパシタ１５の一端に接続される。トランジスタ１４のドレインはトランジスタ１３のソースおよびキャパシタ１５の一端に接続され、ゲートには図示しない制御部からゲート信号Ｇ２が供給され、ソースは基準電圧線Ｌ１２に接続される。なお、スイッチング回路１２は、この構成に限定されるものではなく、１または複数のスイッチング素子を有する様々な回路を用いることができる。 The switching circuit 12 is configured to convert the DC voltage supplied from the DC power supply PDC into an AC voltage. The switching circuit 12 has transistors 13 and 14. In this example, each of the transistors 13 and 14 is an N-type FET (Field Effect Transistor). The drain of the transistor 13 is connected to the voltage line L11, the gate is supplied with a gate signal G1 from a control unit (not shown), and the source is connected to the drain of the transistor 14 and one end of the capacitor 15. The drain of the transistor 14 is connected to the source of the transistor 13 and one end of the capacitor 15, the gate is supplied with a gate signal G2 from a control unit (not shown), and the source is connected to the reference voltage line L12. Note that the switching circuit 12 is not limited to this configuration, and various circuits having one or more switching elements can be used.
　キャパシタ１５は、ＬＬＣ共振コンバータにおける共振キャパシタであり、一端はトランジスタ１３のソースおよびトランジスタ１４のドレインに接続され、他端はトランス２０に接続される。 Capacitor 15 is a resonant capacitor in the LLC resonant converter, with one end connected to the source of transistor 13 and the drain of transistor 14, and the other end connected to transformer 20.
　トランス２０は、１次側回路と２次側回路とを直流的に絶縁するとともに交流的に接続し、１次側回路から供給された交流電圧を、トランス２０の変成比Ｒで変換し、変換された交流電圧を２次側回路に供給するように構成される。トランス２０は、接続端子Ｔｐ１，Ｔｐ２，Ｔｓ１１，Ｔｓ１２，Ｔｓ２１，Ｔｓ２２，Ｔｓ３１，Ｔｓ３２，Ｔｓ４１，Ｔｓ４２と、巻線Ｗｐ１，Ｗｐ２と、巻線Ｗｓ１，Ｗｓ２，Ｗｓ３，Ｗｓ４とを有している。 The transformer 20 is configured to insulate the primary circuit and the secondary circuit from a DC perspective and to connect them from an AC perspective, convert the AC voltage supplied from the primary circuit at the transformation ratio R of the transformer 20, and supply the converted AC voltage to the secondary circuit. The transformer 20 has connection terminals Tp1, Tp2, Ts11, Ts12, Ts21, Ts22, Ts31, Ts32, Ts41, and Ts42, windings Wp1 and Wp2, and windings Ws1, Ws2, Ws3, and Ws4.
　接続端子Ｔｐ１はキャパシタ１５の他端に接続され、接続端子Ｔｐ２は基準電圧線Ｌ１２に接続される。接続端子Ｔｓ１１，Ｔｓ２１，Ｔｓ３１，Ｔｓ４１は、整流回路１７を介して基準電圧線Ｌ２２に接続され、接続端子Ｔｓ１２，Ｔｓ２２，Ｔｓ３２，Ｔｓ４２は、電圧線Ｌ２１に接続される。 The connection terminal Tp1 is connected to the other end of the capacitor 15, and the connection terminal Tp2 is connected to the reference voltage line L12. The connection terminals Ts11, Ts21, Ts31, and Ts41 are connected to the reference voltage line L22 via the rectifier circuit 17, and the connection terminals Ts12, Ts22, Ts32, and Ts42 are connected to the voltage line L21.
　巻線Ｗｐ１は、ＬＬＣ共振コンバータにおける共振コイルであり、一端は接続端子Ｔｐ１に接続され、他端は巻線Ｗｐ２の一端に接続される。巻線Ｗｐ２はトランス２０の１次側巻線であり、一端は巻線Ｗｐ１の他端に接続され、他端は接続端子Ｔｐ２に接続される。以下では、巻線Ｗｐ１，Ｗｐ２の全体を巻線Ｗｐとも呼ぶ。 Winding Wp1 is a resonant coil in the LLC resonant converter, with one end connected to connection terminal Tp1 and the other end connected to one end of winding Wp2. Winding Wp2 is the primary winding of transformer 20, with one end connected to the other end of winding Wp1 and the other end connected to connection terminal Tp2. Below, windings Wp1 and Wp2 as a whole are also referred to as winding Wp.
　巻線Ｗｓ１～Ｗｓ４は、トランス２０の２次側巻線である。巻線Ｗｓ１の一端は接続端子Ｔｓ１１に接続され、他端は接続端子Ｔｓ１２に接続される。巻線Ｗｓ２の一端は接続端子Ｔｓ２１に接続され、他端は接続端子Ｔｓ２２に接続される。巻線Ｗｓ３の一端は接続端子Ｔｓ３１に接続され、他端は接続端子Ｔｓ３２に接続される。巻線Ｗｓ４の一端は接続端子Ｔｓ４１に接続され、他端は接続端子Ｔｓ４２に接続される。 Windings Ws1 to Ws4 are the secondary windings of transformer 20. One end of winding Ws1 is connected to connection terminal Ts11, and the other end is connected to connection terminal Ts12. One end of winding Ws2 is connected to connection terminal Ts21, and the other end is connected to connection terminal Ts22. One end of winding Ws3 is connected to connection terminal Ts31, and the other end is connected to connection terminal Ts32. One end of winding Ws4 is connected to connection terminal Ts41, and the other end is connected to connection terminal Ts42.
　図２は、トランス２０の一構成例を表すものである。図２には、Ｉ－Ｉ矢視方向のトランス２０の断面図、およびＩＩ－ＩＩ矢視方向のトランス２０の断面図をも描いている。トランス２０は、この例では、プレーナトランスである。トランス２０は、磁気コア１００と、基板２００とを有している。 FIG. 2 shows an example of the configuration of the transformer 20. FIG. 2 also shows a cross-sectional view of the transformer 20 as viewed in the direction of the arrows I-I and II-II. In this example, the transformer 20 is a planar transformer. The transformer 20 has a magnetic core 100 and a substrate 200.
　磁気コア１００は、基体部１０１，１０２と、４つの結合部１１１，１１２，１１３，１１４，１１５とを有している。基体部１０１，１０２は、Ｚ方向において互いに対向するように配置される。基体部１０１，１０２は、ＸＹ平面において、略正方形形状を有する。結合部１１１～１１５は、２つの基体部１０１，１０２の対向面内に配置され、これらの２つの基体部１０１，１０２を磁気結合させるように設けられる。Ｘ方向において、結合部１１１および結合部１１２はこの順に並設されるとともに、結合部１１３および結合部１１４はこの順に並設される。Ｙ方向において、結合部１１１および結合部１１３はこの順に並設されるとともに、結合部１１２および結合部１１４はこの順に並設される。結合部１１５は、ＸＹ平面において、結合部１１１～１１４の全体を囲むように設けられる。この例では、結合部１１５は、２つの結合部１１５Ａ，１１５Ｂを含む。結合部１１５Ａは、Ｙ方向における結合部１１１，１１２が設けられた側に設けられ、結合部１１５Ｂは、Ｙ方向における結合部１１３，１１４が設けられた側に設けられる。 The magnetic core 100 has base portions 101, 102 and four connecting portions 111, 112, 113, 114, 115. The base portions 101, 102 are arranged so as to face each other in the Z direction. The base portions 101, 102 have a substantially square shape in the XY plane. The connecting portions 111-115 are arranged on the opposing surfaces of the two base portions 101, 102 and are provided so as to magnetically connect these two base portions 101, 102. In the X direction, the connecting portions 111 and 112 are arranged side by side in this order, and the connecting portions 113 and 114 are arranged side by side in this order. In the Y direction, the connecting portions 111 and 113 are arranged side by side in this order, and the connecting portions 112 and 114 are arranged side by side in this order. The connecting portion 115 is provided so as to surround the connecting portions 111 to 114 in the XY plane. In this example, the connecting portion 115 includes two connecting portions 115A and 115B. The connecting portion 115A is provided on the side in the Y direction where the connecting portions 111 and 112 are provided, and the connecting portion 115B is provided on the side in the Y direction where the connecting portions 113 and 114 are provided.
　この例では、ＸＹ平面において、結合部１１１，１１４の断面積は、結合部１１２，１１３の断面積よりも小さい。なお、これに限定されるものではなく、結合部１１１～１１４の断面積は、互いに等しくてもよい。 In this example, in the XY plane, the cross-sectional area of the joints 111 and 114 is smaller than the cross-sectional area of the joints 112 and 113. However, this is not limited to this, and the cross-sectional areas of the joints 111 to 114 may be equal to each other.
　この例では、結合部１１１～１１５のそれぞれには、Ｚ方向の中央部付近にギャップＧＡＰが設けられている。なお、これに限定されるものではなく、結合部１１１のＺ方向の端部において、結合部１１１と基体部１０１との間にギャップＧＡＰを設けてもよいし、結合部１１１のＺ方向とは反対方向の端部において、結合部１１１と基体部１０２との間にギャップＧＡＰを設けてもよい。結合部１１２～１１４についても同様である。 In this example, a gap GAP is provided near the center in the Z direction in each of the joints 111 to 115. However, this is not limited to this, and a gap GAP may be provided between the joint 111 and the base part 101 at the end of the joint 111 in the Z direction, or a gap GAP may be provided between the joint 111 and the base part 102 at the end of the joint 111 in the opposite direction to the Z direction. The same applies to the joints 112 to 114.
　結合部１１１，１１４のギャップＧＡＰの幅は、結合部１１２，１１３のギャップＧＡＰの幅よりも小さくすることができる。すなわち、この例では、結合部１１１，１１４の断面積は、結合部１１２，１１３の断面積よりも小さいので、結合部１１１～１１４のギャップＧＡＰの幅を、結合部１１１～１１４の磁気抵抗が互いにほぼ等しくなるように調整することができる。また、結合部１１５のギャップＧＡＰの幅は、結合部１１１，１１４のギャップＧＡＰの幅と、結合部１１２，１１３のギャップＧＡＰの幅との間の値にすることができる。なお、これに限定されるものではなく、結合部１１１～１１５のギャップＧＡＰの幅は適宜設定される。 The width of the gap GAP of the connecting parts 111 and 114 can be made smaller than the width of the gap GAP of the connecting parts 112 and 113. That is, in this example, since the cross-sectional area of the connecting parts 111 and 114 is smaller than the cross-sectional area of the connecting parts 112 and 113, the width of the gap GAP of the connecting parts 111 to 114 can be adjusted so that the magnetic resistances of the connecting parts 111 to 114 are approximately equal to each other. Furthermore, the width of the gap GAP of the connecting part 115 can be set to a value between the width of the gap GAP of the connecting parts 111 and 114 and the width of the gap GAP of the connecting parts 112 and 113. However, this is not limited to this, and the width of the gap GAP of the connecting parts 111 to 115 can be set appropriately.
　基板２００は、コイルパターンが形成された多層基板（この例では３層基板）である。基板２００には、磁気コア１００における結合部１１１～１１５に対応する位置に貫通穴が設けられており、基板２００は、基体部１０１，１０２の間に挟まれるようになっている。この基板２００には、巻線Ｗｐ１，Ｗｐ２、および巻線Ｗｓ１，Ｗｓ２，Ｗｓ３，Ｗｓ４が設けられている。 The substrate 200 is a multi-layer substrate (a three-layer substrate in this example) on which a coil pattern is formed. Through holes are provided in the substrate 200 at positions corresponding to the coupling parts 111-115 of the magnetic core 100, and the substrate 200 is sandwiched between the base parts 101 and 102. The substrate 200 is provided with windings Wp1, Wp2, and windings Ws1, Ws2, Ws3, and Ws4.
　図３は、基板２００における巻線の一構成例を表すものであり、図３（Ａ）は第１層である配線層ＬＡ１を示し、図３（Ｂ）は第２層である配線層ＬＡ２を示し、図３（Ｃ）は第３層である配線層ＬＡ３を示す。配線層ＬＡ１～ＬＡ３は、基板２００の層方向において、この順に設けられている。図４は、電力変換装置１における巻線Ｗｐ（巻線Ｗｐ１，Ｗｓ１）および巻線Ｗｓ１～Ｗｓ４の一接続例を表すものである。 FIG. 3 shows an example of the configuration of the windings in the substrate 200, with FIG. 3(A) showing the first layer, wiring layer LA1, FIG. 3(B) showing the second layer, wiring layer LA2, and FIG. 3(C) showing the third layer, wiring layer LA3. The wiring layers LA1 to LA3 are provided in this order in the layer direction of the substrate 200. FIG. 4 shows an example of the connection of the winding Wp (windings Wp1, Ws1) and windings Ws1 to Ws4 in the power conversion device 1.
　この例では、巻線Ｗｐは配線層ＬＡ１（図３（Ａ））に設けられ、巻線Ｗｓ１，Ｗｓ２は配線層ＬＡ２（図３（Ｂ））に設けられ、巻線Ｗｓ３，Ｗｓ４は配線層ＬＡ３（図３（Ｃ））に設けられる。なお、これに限定されるものではなく、巻線Ｗｐおよび巻線Ｗｓ１～Ｗｓ４は、配線層ＬＡ１～ＬＡ３のうちのどの配線層に形成されていてもよい。 In this example, the winding Wp is provided in the wiring layer LA1 (Fig. 3(A)), the windings Ws1 and Ws2 are provided in the wiring layer LA2 (Fig. 3(B)), and the windings Ws3 and Ws4 are provided in the wiring layer LA3 (Fig. 3(C)). Note that this is not limited to this, and the winding Wp and the windings Ws1 to Ws4 may be formed in any of the wiring layers LA1 to LA3.
　図３（Ａ）に示したように、この例では、巻線Ｗｐは、４つの結合部１１１～１１４に巻き付けられる。具体的には、巻線Ｗｐは、接続端子Ｔｐ１から接続端子Ｔｐ２に向かう方向において、結合部１１１～１１４の全体、結合部１１３、結合部１１４、結合部１１２、結合部１１１の順に巻き付けられる。巻線Ｗｐのうち、結合部１１１～１１４の全体に巻き付けられた部分は巻線Ｗｐ１に対応し、結合部１１１～１１４のそれぞれに巻き付けられた部分は巻線Ｗｐ２に対応する。すなわち、結合部１１１～１１４の全体に巻き付けられた部分は、巻線Ｗｓ１～Ｗｓ４のそれぞれとの結合が弱いので、トランス２０の１次巻線としてではなく、共振コイルとして機能する。巻線Ｗｐは、接続端子Ｔｐ１から接続端子Ｔｐ２に向かう方向において、結合部１１１～１１４の全体に時計回りに１回巻き付けられ、結合部１１２および結合部１１３のそれぞれに時計回りに１回巻き付けられ、結合部１１１および結合部１１４のそれぞれに反時計回りに１回巻き付けられる。なお、図示を省略しているが、巻線Ｗｐの交差部分では、巻線Ｗｐは、例えばビアおよび他の配線層に設けられた配線を介して部分的に迂回するように構成される。 As shown in FIG. 3A, in this example, the winding Wp is wound around the four coupling parts 111-114. Specifically, in the direction from connection terminal Tp1 to connection terminal Tp2, the winding Wp is wound around the entire coupling parts 111-114, coupling part 113, coupling part 114, coupling part 112, and coupling part 111 in that order. The portion of the winding Wp that is wound around the entire coupling parts 111-114 corresponds to the winding Wp1, and the portion that is wound around each of the coupling parts 111-114 corresponds to the winding Wp2. In other words, the portion that is wound around the entire coupling parts 111-114 has weak coupling with each of the windings Ws1-Ws4, and therefore functions as a resonant coil rather than as a primary winding of the transformer 20. In the direction from connection terminal Tp1 toward connection terminal Tp2, the winding Wp is wound once clockwise around all of coupling parts 111 to 114, once clockwise around each of coupling parts 112 and 113, and once counterclockwise around each of coupling parts 111 and 114. Although not shown in the figure, at the intersections of the winding Wp, the winding Wp is configured to make partial detours via, for example, vias and wiring provided in other wiring layers.
　図３（Ｂ）に示したように、この例では、巻線Ｗｓ１は、２つの結合部１１３，１１４に巻き付けられ、巻線Ｗｓ２は、２つの結合部１１１，１１２に巻き付けられる。具体的には、巻線Ｗｓ１は、接続端子Ｔｓ１１から接続端子Ｔｓ１２に向かう方向において、結合部１１３に時計回りに１回巻き付けられ、結合部１１４に反時計回りに１回巻き付けられる。巻線Ｗｓ２は、接続端子Ｔｓ２１から接続端子Ｔｓ２２に向かう方向において、結合部１１１に反時計回りに１回巻き付けられ、結合部１１２に時計回りに１回巻き付けられる。 As shown in FIG. 3B, in this example, the winding Ws1 is wound around the two coupling parts 113 and 114, and the winding Ws2 is wound around the two coupling parts 111 and 112. Specifically, the winding Ws1 is wound once clockwise around the coupling part 113 in the direction from the connection terminal Ts11 to the connection terminal Ts12, and once counterclockwise around the coupling part 114. The winding Ws2 is wound once counterclockwise around the coupling part 111 in the direction from the connection terminal Ts21 to the connection terminal Ts22, and once clockwise around the coupling part 112.
　図３（Ｃ）に示したように、この例では、巻線Ｗｓ３は、２つの結合部１１３，１１４に巻き付けられ、巻線Ｗｓ４は、２つの結合部１１１，１１２に巻き付けられる。具体的には、巻線Ｗｓ３は、接続端子Ｔｓ３１から接続端子Ｔｓ３２に向かう方向において、結合部１１３に反時計回りに１回巻き付けられ、結合部１１４に時計回りに１回巻き付けられる。巻線Ｗｓ４は、接続端子Ｔｓ４１から接続端子Ｔｓ４２に向かう方向において、結合部１１１に時計回りに１回巻き付けられ、結合部１１２に反時計回りに１回巻き付けられる。 As shown in FIG. 3(C), in this example, the winding Ws3 is wound around the two coupling parts 113 and 114, and the winding Ws4 is wound around the two coupling parts 111 and 112. Specifically, the winding Ws3 is wound once counterclockwise around the coupling part 113 in the direction from the connection terminal Ts31 to the connection terminal Ts32, and once clockwise around the coupling part 114. The winding Ws4 is wound once clockwise around the coupling part 111 in the direction from the connection terminal Ts41 to the connection terminal Ts42, and once counterclockwise around the coupling part 112.
　整流回路１７（図１）は、トランス２０の巻線Ｗｓ１～Ｗｓ４のそれぞれから出力された交流電圧を整流するように構成される。トランス２０の巻線Ｗｓ１～Ｗｓ４および整流回路１７は、いわゆるセンタータップ型の回路を構成する。整流回路１７は、ダイオードＤ１，Ｄ２，Ｄ３，Ｄ４を有している。ダイオードＤ１のアノードは基準電圧線Ｌ２２に接続され、カソードはトランス２０の接続端子Ｔｓ１１に接続される。ダイオードＤ２のアノードは基準電圧線Ｌ２２に接続され、カソードはトランス２０の接続端子Ｔｓ２１に接続される。ダイオードＤ３のアノードは基準電圧線Ｌ２２に接続され、カソードはトランス２０の接続端子Ｔｓ３１に接続される。ダイオードＤ４のアノードは基準電圧線Ｌ２２に接続され、カソードはトランス２０の接続端子Ｔｓ４１に接続される。なお、この例では、ダイオードＤ１～Ｄ４を基準電圧線Ｌ２２に接続するようにしたが、これに代えて、例えば、電圧線Ｌ２１に接続するようにしてもよい。 The rectifier circuit 17 (Figure 1) is configured to rectify the AC voltages output from each of the windings Ws1 to Ws4 of the transformer 20. The windings Ws1 to Ws4 of the transformer 20 and the rectifier circuit 17 form a so-called center-tap type circuit. The rectifier circuit 17 has diodes D1, D2, D3, and D4. The anode of the diode D1 is connected to the reference voltage line L22, and the cathode is connected to the connection terminal Ts11 of the transformer 20. The anode of the diode D2 is connected to the reference voltage line L22, and the cathode is connected to the connection terminal Ts21 of the transformer 20. The anode of the diode D3 is connected to the reference voltage line L22, and the cathode is connected to the connection terminal Ts31 of the transformer 20. The anode of the diode D4 is connected to the reference voltage line L22, and the cathode is connected to the connection terminal Ts41 of the transformer 20. In this example, the diodes D1 to D4 are connected to the reference voltage line L22, but instead, they may be connected to, for example, the voltage line L21.
　平滑回路１８は、整流回路１７から出力された電圧を平滑化するように構成される。平滑回路１８は、キャパシタ１９を有している。キャパシタ１９の一端は、電圧線Ｌ２１に接続され、他端は基準電圧線Ｌ２２に接続される。なお、この例では、平滑回路１８はキャパシタ１９のみを用いて平滑化するようにしたが、これに限定されるものではなく、例えば、さらにインダクタを設け、インダクタおよびキャパシタ１９を用いて平滑化してもよい。このインダクタは、例えば、キャパシタ１９の一端とトランス２０の接続端子Ｔｓ１２，Ｔｓ２２，Ｔｓ３２，Ｔｓ４２との間に設けられる。 The smoothing circuit 18 is configured to smooth the voltage output from the rectifier circuit 17. The smoothing circuit 18 has a capacitor 19. One end of the capacitor 19 is connected to the voltage line L21, and the other end is connected to the reference voltage line L22. Note that in this example, the smoothing circuit 18 is configured to smooth using only the capacitor 19, but this is not limited to this. For example, an inductor may be further provided and smoothing may be performed using the inductor and the capacitor 19. This inductor is provided, for example, between one end of the capacitor 19 and the connection terminals Ts12, Ts22, Ts32, and Ts42 of the transformer 20.
　ここで、トランス２０は、本開示における「磁性部品」の一具体例に対応する。磁気コア１００は、本開示における「磁気コア」の一具体例に対応する。結合部１１１は、本開示における「第１の結合部」の一具体例に対応する。結合部１１２は、本開示における「第２の結合部」の一具体例に対応する。結合部１１３は、本開示における「第３の結合部」の一具体例に対応する。結合部１１４は、本開示における「第４の結合部」の一具体例に対応する。結合部１１５は、本開示における「第５の結合部」の一具体例に対応する。結合部１１５Ａ，１１５Ｂは、本開示における「複数の部分結合部」の一具体例に対応する。巻線Ｗｐは、本開示における「第１の巻線」の一具体例に対応する。接続端子Ｔｐ１は、本開示における「第１の接続端子」の一具体例に対応する。接続端子Ｔｐ２は、本開示における「第２の接続端子」の一具体例に対応する。巻線Ｗｓ１～Ｗｓ４は、本開示における「第２の巻線」の一具体例に対応する。接続端子Ｔｓ２１は、本開示における「第３の接続端子」の一具体例に対応する。接続端子Ｔｓ２２は、本開示における「第４の接続端子」の一具体例に対応する。スイッチング回路１２は、本開示における「スイッチング回路」の一具体例に対応する。トランジスタ１３，１４は、本開示における「スイッチング素子」の一具体例に対応する。整流回路１７は、本開示における「整流回路」の一具体例に対応する。平滑回路１８は、本開示における「平滑回路」の一具体例に対応する。 Here, the transformer 20 corresponds to a specific example of a "magnetic component" in this disclosure. The magnetic core 100 corresponds to a specific example of a "magnetic core" in this disclosure. The coupling portion 111 corresponds to a specific example of a "first coupling portion" in this disclosure. The coupling portion 112 corresponds to a specific example of a "second coupling portion" in this disclosure. The coupling portion 113 corresponds to a specific example of a "third coupling portion" in this disclosure. The coupling portion 114 corresponds to a specific example of a "fourth coupling portion" in this disclosure. The coupling portion 115 corresponds to a specific example of a "fifth coupling portion" in this disclosure. The coupling portions 115A and 115B correspond to a specific example of a "multiple partial coupling portions" in this disclosure. The winding Wp corresponds to a specific example of a "first winding" in this disclosure. The connection terminal Tp1 corresponds to a specific example of a "first connection terminal" in this disclosure. The connection terminal Tp2 corresponds to a specific example of a "second connection terminal" in this disclosure. The windings Ws1 to Ws4 correspond to a specific example of a "second winding" in this disclosure. The connection terminal Ts21 corresponds to a specific example of a "third connection terminal" in this disclosure. The connection terminal Ts22 corresponds to a specific example of a "fourth connection terminal" in this disclosure. The switching circuit 12 corresponds to a specific example of a "switching circuit" in this disclosure. The transistors 13 and 14 correspond to a specific example of a "switching element" in this disclosure. The rectifier circuit 17 corresponds to a specific example of a "rectifier circuit" in this disclosure. The smoothing circuit 18 corresponds to a specific example of a "smoothing circuit" in this disclosure.
［動作および作用］
　続いて、本実施の形態の電力変換装置１の動作および作用について説明する。 [Actions and Functions]
Next, the operation and function of the power conversion device 1 of the present embodiment will be described.
（全体動作概要）
　まず、図１を参照して、電力変換装置１の全体動作概要を説明する。スイッチング回路１２は、トランジスタ１３，１４がスイッチング動作を行うことにより、直流電源ＰＤＣから供給された直流電圧に基づいて交流電圧を生成する。トランス２０は、この交流電圧を変成比Ｒにより変換する。整流回路１７は、トランス２０の巻線Ｗｓ１～Ｗｓ４のそれぞれから出力された交流電圧を整流する。平滑回路１８は、整流回路１７から出力された電圧を平滑化する。 (Overall operation overview)
First, an overview of the overall operation of the power conversion device 1 will be described with reference to Fig. 1. The switching circuit 12 generates an AC voltage based on a DC voltage supplied from a DC power supply PDC by transistors 13 and 14 performing switching operations. The transformer 20 converts this AC voltage with a transformation ratio R. The rectifier circuit 17 rectifies the AC voltages output from the windings Ws1 to Ws4 of the transformer 20. The smoothing circuit 18 smoothes the voltage output from the rectifier circuit 17.
（詳細動作）
　図５は、電力変換装置１におけるゲート信号Ｇ１，Ｇ２の波形例を表すものである。図６Ａは、電力変換装置１における一動作状態を表すものであり、図６Ｂは、電力変換装置１における他の一動作状態を表すものである。図６Ａ，６Ｂでは、トランジスタ１３，１４を、その動作状態（オン状態もしくはオフ状態）を表すシンボルで示している。図７Ａ，７Ｂは、磁気コア１００の結合部１１１～１１５における磁束の向きを表すものである。 (Detailed operation)
Fig. 5 shows an example of the waveforms of gate signals G1 and G2 in the power conversion device 1. Fig. 6A shows one operating state of the power conversion device 1, and Fig. 6B shows another operating state of the power conversion device 1. In Figs. 6A and 6B, the transistors 13 and 14 are shown with symbols representing their operating states (on or off). Figs. 7A and 7B show the directions of magnetic flux at the coupling parts 111 to 115 of the magnetic core 100.
　電力変換装置１では、図５に示したように、タイミングｔ０において、ゲート信号Ｇ２が高レベルから低レベルに遷移する。これにより、トランジスタ１３，１４はともにオフ状態になる。タイミングｔ０～ｔ１の期間（いわゆるデッドタイム）は、トランジスタ１３，１４の両方がオフ状態である。 In the power conversion device 1, as shown in FIG. 5, at timing t0, the gate signal G2 transitions from high to low. This causes both transistors 13 and 14 to be in the off state. During the period from timing t0 to t1 (the so-called dead time), both transistors 13 and 14 are in the off state.
　タイミングｔ１において、ゲート信号Ｇ１が低レベルから高レベルに遷移する。これにより、トランジスタ１３がオン状態になる。タイミングｔ１～ｔ２の期間において、トランジスタ１３はオン状態を維持し、トランジスタ１４はオフ状態を維持する。 At timing t1, gate signal G1 transitions from low to high. This causes transistor 13 to turn on. During the period from timing t1 to t2, transistor 13 maintains the on state and transistor 14 maintains the off state.
　このタイミングｔ１～ｔ２の期間におけるあるタイミングでは、図６Ａに示したように、１次側回路に、トランジスタ１３、キャパシタ１５、接続端子Ｔｐ１、巻線Ｗｐ、接続端子Ｔｐ２の順に電流ＩｐＡが流れる。このように、巻線Ｗｐにおいて、接続端子Ｔｐ１から接続端子Ｔｐ２に向かって電流ＩｐＡが流れることにより、トランス２０では、図７Ａ（Ａ）に示したように、結合部１１１～１１５において磁束が生じる。結合部１１１，１１４のそれぞれにおける巻線Ｗｐの巻方向と、結合部１１２，１１３のそれぞれにおける巻線Ｗｐの巻方向とは、互いに異なるので、結合部１１１，１１４における磁束の方向は、Ｚ方向であり、結合部１１２，１１３における磁束の方向は、Ｚ方向と反対の方向である。結合部１１５における磁束の方向は、Ｚ方向である。その結果、２次側回路では、図６Ａ，７Ａ（Ｃ）に示したように、巻線Ｗｓ３、接続端子Ｔｓ３２、キャパシタ１９および負荷ＬＤ、ダイオードＤ３、接続端子Ｔｓ３１、巻線Ｗｓ３の順に電流Ｉｓ３Ａが流れるとともに、巻線Ｗｓ４、接続端子Ｔｓ４２、キャパシタ１９および負荷ＬＤ、ダイオードＤ４、接続端子Ｔｓ４１、巻線Ｗｓ４の順に電流Ｉｓ４Ａが流れる。 At a certain timing in the period from timing t1 to timing t2, as shown in Figure 6A, current IpA flows in the primary circuit through transistor 13, capacitor 15, connection terminal Tp1, winding Wp, and connection terminal Tp2 in that order. In this way, current IpA flows from connection terminal Tp1 to connection terminal Tp2 in winding Wp, and as shown in Figure 7A (A), magnetic flux is generated at couplings 111 to 115 in transformer 20. Since the winding direction of winding Wp at couplings 111 and 114 is different from the winding direction of winding Wp at couplings 112 and 113, the direction of magnetic flux at couplings 111 and 114 is the Z direction, and the direction of magnetic flux at couplings 112 and 113 is opposite to the Z direction. The direction of magnetic flux at coupling 115 is the Z direction. As a result, in the secondary circuit, as shown in Figures 6A and 7A (C), current Is3A flows through winding Ws3, connection terminal Ts32, capacitor 19 and load LD, diode D3, connection terminal Ts31, and winding Ws3, while current Is4A flows through winding Ws4, connection terminal Ts42, capacitor 19 and load LD, diode D4, connection terminal Ts41, and winding Ws4.
　そして、図５に示したように、タイミングｔ２において、ゲート信号Ｇ１が高レベルから低レベルに遷移する。これにより、トランジスタ１３がオフ状態になる。タイミングｔ２～ｔ３の期間（いわゆるデッドタイム）は、トランジスタ１３，１４の両方がオフ状態である。 Then, as shown in FIG. 5, at timing t2, gate signal G1 transitions from high to low. This causes transistor 13 to turn off. During the period from timing t2 to t3 (the so-called dead time), both transistors 13 and 14 are in the off state.
　次に、タイミングｔ３において、ゲート信号Ｇ２が低レベルから高レベルに遷移する。これにより、トランジスタ１４がオン状態になる。タイミングｔ３～ｔ４の期間において、トランジスタ１３はオフ状態を維持し、トランジスタ１４はオン状態を維持する。 Next, at timing t3, gate signal G2 transitions from low to high. This causes transistor 14 to turn on. During the period from timing t3 to t4, transistor 13 remains in the off state, and transistor 14 remains in the on state.
　このタイミングｔ３～ｔ４の期間におけるあるタイミングでは、図６Ｂに示したように、１次側回路に、キャパシタ１５、トランジスタ１４、接続端子Ｔｐ２、巻線Ｗｐ、接続端子Ｔｐ１の順に電流ＩｐＢが流れる。このように、巻線Ｗｐにおいて、接続端子Ｔｐ２から接続端子Ｔｐ１に向かって電流ＩｐＢが流れることにより、トランス２０では、図７Ｂ（Ａ）に示したように、結合部１１１～１１５において磁束が生じる。結合部１１１，１１４のそれぞれにおける巻線Ｗｐの巻方向と、結合部１１２，１１３のそれぞれにおける巻線Ｗｐの巻方向とは、互いに異なるので、結合部１１１，１１４における磁束の方向は、Ｚ方向と反対の方向であり、結合部１１２，１１３における磁束の方向は、Ｚ方向である。結合部１１５における磁束の方向は、Ｚ方向と反対の方向である。その結果、２次側回路では、図６Ｂ，７Ｂ（Ｂ）に示したように、巻線Ｗｓ１、接続端子Ｔｓ１２、キャパシタ１９および負荷ＬＤ、ダイオードＤ１、接続端子Ｔｓ１１、巻線Ｗｓ１の順に電流Ｉｓ１Ｂが流れるとともに、巻線Ｗｓ２、接続端子Ｔｓ２２、キャパシタ１９および負荷ＬＤ、ダイオードＤ２、接続端子Ｔｓ２１、巻線Ｗｓ２の順に電流Ｉｓ２Ｂが流れる。 At a certain timing in the period from timing t3 to timing t4, as shown in Figure 6B, current IpB flows in the primary circuit through capacitor 15, transistor 14, connection terminal Tp2, winding Wp, and connection terminal Tp1 in that order. In this way, current IpB flows from connection terminal Tp2 to connection terminal Tp1 in winding Wp, and as shown in Figure 7B (A), magnetic flux is generated at couplings 111 to 115 in transformer 20. Since the winding direction of winding Wp at couplings 111 and 114 is different from the winding direction of winding Wp at couplings 112 and 113, the direction of magnetic flux at couplings 111 and 114 is opposite the Z direction, and the direction of magnetic flux at couplings 112 and 113 is the Z direction. The direction of magnetic flux at coupling 115 is opposite the Z direction. As a result, in the secondary circuit, as shown in Figures 6B and 7B (B), current Is1B flows through winding Ws1, connection terminal Ts12, capacitor 19 and load LD, diode D1, connection terminal Ts11, and winding Ws1 in that order, while current Is2B flows through winding Ws2, connection terminal Ts22, capacitor 19 and load LD, diode D2, connection terminal Ts21, and winding Ws2 in that order.
　そして、タイミングｔ４において、ゲート信号Ｇ２が高レベルから低レベルに遷移する。これにより、トランジスタ１４がオフ状態になる。タイミングｔ４～ｔ５の期間（いわゆるデッドタイム）は、トランジスタ１３，１４の両方がオフ状態である。 Then, at timing t4, gate signal G2 transitions from high to low. This turns transistor 14 off. During the period from timing t4 to t5 (the so-called dead time), both transistors 13 and 14 are in the off state.
　タイミングｔ５において、ゲート信号Ｇ１が低レベルから高レベルに遷移する。これにより、トランジスタ１３がオン状態になる。 At timing t5, the gate signal G1 transitions from low to high. This causes the transistor 13 to turn on.
　電力変換装置１は、このような動作を繰り返すことにより、直流電源ＰＤＣから供給された直流電力を変圧して出力する。電力変換装置１は、例えばＰＦＭ（Pulse Frequency Modulation）を用いてトランジスタ１３，１４の動作を制御することにより、出力電圧が一定になるように制御する。なお、これに限定されるものではなく、電力変換装置１は、ＰＷＭ（Pulse Width modulation）を用いてトランジスタ１３，１４の動作を制御することにより、出力電圧が一定になるように制御してもよい。 By repeating this operation, the power conversion device 1 transforms and outputs the DC power supplied from the DC power source PDC. The power conversion device 1 controls the output voltage to be constant by controlling the operation of transistors 13, 14 using, for example, PFM (Pulse Frequency Modulation). However, this is not limited to this, and the power conversion device 1 may also control the output voltage to be constant by controlling the operation of transistors 13, 14 using PWM (Pulse Width Modulation).
　このように、トランス２０では、互いに対向する２つの基体部１０１，１０２と、２つの基体部１０１，１０２の対向面内に配置され、２つの基体部１０１，１０２を磁気結合させる第１の結合部（結合部１１１）、第２の結合部（結合部１１２）、第３の結合部（結合部１１３）、第４の結合部（結合部１１４）、および第５の結合部（結合部１１５）とを有する磁気コア１００を設けるようにした。第１の結合部および第２の結合部は第１の方向（Ｘ方向）にこの順に並設され、第３の結合部および第４の結合部は第１の方向にこの順で並設され、第１の結合部および第３の結合部は第２の方向（Ｙ方向）に並設され、第２の結合部および第４の結合部は第２の方向に並設され、第５の結合部は、第１の結合部、第２の結合部、第３の結合部、および第４の結合部の全体を囲むようにした。また、トランス２０では、第１の結合部、第２の結合部、第３の結合部、および第４の結合部のうちの１以上に巻き付けられた第１の巻線（巻線Ｗｐ）と、第１の結合部、第２の結合部、第３の結合部、および第４の結合部のうちの１以上に巻き付けられた１または複数の第２の巻線（巻線Ｗｓ１～Ｗｓ４）とを設けるようにした。これにより、トランス２０では、漏れ磁束による損失を低減することができる。 In this way, the transformer 20 is provided with two base parts 101, 102 facing each other, and a magnetic core 100 that is arranged on the facing surfaces of the two base parts 101, 102 and has a first coupling part (coupling part 111), a second coupling part (coupling part 112), a third coupling part (coupling part 113), a fourth coupling part (coupling part 114), and a fifth coupling part (coupling part 115) that magnetically couple the two base parts 101, 102. The first and second coupling parts are arranged in this order in the first direction (X direction), the third and fourth coupling parts are arranged in this order in the first direction, the first and third coupling parts are arranged in this order in the second direction (Y direction), the second and fourth coupling parts are arranged in the second direction, and the fifth coupling part surrounds the first, second, third, and fourth coupling parts in their entirety. In addition, the transformer 20 is provided with a first winding (winding Wp) wound around one or more of the first, second, third, and fourth coupling parts, and one or more second windings (windings Ws1 to Ws4) wound around one or more of the first, second, third, and fourth coupling parts. This allows the transformer 20 to reduce losses due to leakage flux.
　すなわち、例えば、特許文献１に記載の技術では、トランスの中央に、共振コイルに対応する脚部が設けられる。この脚部は、トランスの中央に設けられるので、磁束が集中する。この脚部からの漏れ磁束は、この脚部に巻き付けられた、共振コイルに対応する巻線付近に広がる。よって、この漏れ磁束により、この巻線の配線パターンにおいて渦電流が生じ、エネルギーの損失（フリンジングロス）が生じてしまう。また、この巻線の配線パターンにおいて、集中的に発熱が生じてしまう。本実施の形態に係るトランス２０では、このトランスの中央に設けられた脚部の代わりに、結合部１１１～１１４を囲む結合部１１５を設けるようにした。結合部１１５は、結合部１１１～１１４の全体を囲むように設けられるので、磁束が分散する。また、結合部１１５は、トランス２０の中央ではなく、トランス２０の端部に設けられるので、ＸＹ平面における断面積を大きくすることができ、磁束密度を低減することができる。よって、この結合部１１５からの漏れ磁束による損失を低減することができる。これにより、トランス２０内における集中的な発熱を抑えることができる。 That is, for example, in the technology described in Patent Document 1, a leg corresponding to the resonant coil is provided in the center of the transformer. Since this leg is provided in the center of the transformer, magnetic flux is concentrated. Leakage magnetic flux from this leg spreads to the vicinity of the winding corresponding to the resonant coil that is wound around this leg. Therefore, this leakage magnetic flux generates eddy currents in the wiring pattern of this winding, resulting in energy loss (fringing loss). In addition, heat is generated in a concentrated manner in the wiring pattern of this winding. In the transformer 20 according to this embodiment, instead of the leg provided in the center of the transformer, a coupling part 115 that surrounds the coupling parts 111 to 114 is provided. The coupling part 115 is provided so as to surround the entire coupling parts 111 to 114, so that the magnetic flux is dispersed. In addition, the coupling part 115 is provided at the end of the transformer 20, not in the center of the transformer 20, so that the cross-sectional area in the XY plane can be increased and the magnetic flux density can be reduced. Therefore, the loss due to the leakage magnetic flux from the coupling part 115 can be reduced. This helps prevent concentrated heat generation within the transformer 20.
［効果］
　以上のように本実施の形態では、互いに対向する２つの基体部、２つの基体部の対向面内に配置され、２つの基体部を磁気結合させる第１の結合部、第２の結合部、第３の結合部、第４の結合部、および第５の結合部とを有する磁気コアを設けるようにした。第１の結合部および第２の結合部は第１の方向にこの順に並設され、第３の結合部および第４の結合部は第１の方向にこの順で並設され、第１の結合部および第３の結合部は第２の方向に並設され、第２の結合部および第４の結合部は第２の方向に並設され、第５の結合部は、第１の結合部、第２の結合部、第３の結合部、および第４の結合部の全体を囲むようにした。また、第１の結合部、第２の結合部、第３の結合部、および第４の結合部のうちの１以上に巻き付けられた第１の巻線と、第１の結合部、第２の結合部、第３の結合部、および第４の結合部のうちの１以上に巻き付けられた１または複数の第２の巻線とを設けるようにした。これにより、漏れ磁束による損失を低減することができる。 [effect]
As described above, in this embodiment, a magnetic core is provided that has two base parts facing each other, and a first coupling part, a second coupling part, a third coupling part, a fourth coupling part, and a fifth coupling part that are arranged on the facing surfaces of the two base parts and magnetically couple the two base parts. The first coupling part and the second coupling part are arranged in this order in the first direction, the third coupling part and the fourth coupling part are arranged in this order in the first direction, the first coupling part and the third coupling part are arranged in the second direction, the second coupling part and the fourth coupling part are arranged in the second direction, and the fifth coupling part surrounds the entire first coupling part, the second coupling part, the third coupling part, and the fourth coupling part. In addition, a first winding is wound around one or more of the first coupling portion, the second coupling portion, the third coupling portion, and the fourth coupling portion, and one or more second windings are wound around one or more of the first coupling portion, the second coupling portion, the third coupling portion, and the fourth coupling portion, thereby making it possible to reduce loss due to leakage magnetic flux.
［変形例１］
　上記実施の形態では、図３に示したように巻線Ｗｐを結合部１１１～１１４に巻き付けたが、これに限定されるものではなく、これに代えて、例えば、図８に示したトランス２０Ａのように巻き付けてもよい。具体的には、図８（Ａ）に示したように、巻線Ｗｐは、接続端子Ｔｐ１から接続端子Ｔｐ２に向かう方向において、結合部１１２，１１３に巻き付けられる。巻線Ｗｐは、接続端子Ｔｐ１から接続端子Ｔｐ２に向かう方向において、結合部１１２，１１３の全体に時計回りに２回巻き付けられる。この巻線Ｗｐの巻き付け方は、以下に示すように、上記実施の形態に係るトランス２０における巻線Ｗｐの巻き付け方（図３）と等価である。 [Modification 1]
In the above embodiment, the winding Wp is wound around the coupling parts 111 to 114 as shown in Fig. 3, but the present invention is not limited to this, and instead, for example, the winding may be wound as in the transformer 20A shown in Fig. 8. Specifically, as shown in Fig. 8(A), the winding Wp is wound around the coupling parts 112 and 113 in the direction from the connection terminal Tp1 to the connection terminal Tp2. The winding Wp is wound clockwise twice around the entire coupling parts 112 and 113 in the direction from the connection terminal Tp1 to the connection terminal Tp2. This winding method of the winding Wp is equivalent to the winding method of the winding Wp in the transformer 20 according to the above embodiment (Fig. 3), as will be described below.
　図９（Ａ）は、上記実施の形態に係るトランス２０の巻線Ｗｐを示し、図９（Ｂ）は、本変形例に係るトランス２０Ａの巻線Ｗｐを示す。図９において、巻線Ｗｐに示した矢印は、接続端子Ｔｐ１から接続端子Ｔｐ２に向かって、電流Ｉｐが流れている場合における電流Ｉｐの方向を示す。 FIG. 9(A) shows the winding Wp of the transformer 20 according to the above embodiment, and FIG. 9(B) shows the winding Wp of the transformer 20A according to this modified example. In FIG. 9, the arrow shown on the winding Wp indicates the direction of the current Ip when the current Ip flows from the connection terminal Tp1 to the connection terminal Tp2.
　上記実施の形態に係るトランス２０（図９（Ａ））では、符号Ｗで示したように、結合部１１１および結合部１１５Ａの間の巻線Ｗｐには、互いに異なる方向の電流が流れている。よって、結合部１１１および結合部１１５Ａの間の巻線Ｗｐには、電流は流れていないとみなすことができる。結合部１１１の周囲では、結合部１１１と結合部１１２との間に上向きの電流が流れ、結合部１１１と結合部１１３との間に左向きの電流が流れている。 In the transformer 20 (Figure 9 (A)) according to the above embodiment, as indicated by the symbol W, currents flow in different directions in the winding Wp between the coupling parts 111 and 115A. Therefore, it can be considered that no current flows in the winding Wp between the coupling parts 111 and 115A. Around the coupling part 111, an upward current flows between the coupling parts 111 and 112, and a leftward current flows between the coupling parts 111 and 113.
　同様に、結合部１１４および結合部１１５Ｂの間の巻線Ｗｐには、互いに異なる方向の電流が流れている。よって、結合部１１４および結合部１１５Ａの間の巻線Ｗｐには、電流は流れていないとみなすことができる。結合部１１４の周囲では、結合部１１３と結合部１１４との間に下向きの電流が流れ、結合部１１２と結合部１１４との間に右向きの電流が流れている。 Similarly, currents flow in different directions in the winding Wp between the joints 114 and 115B. Therefore, it can be considered that no current flows in the winding Wp between the joints 114 and 115A. Around the joint 114, a downward current flows between the joints 113 and 114, and a rightward current flows between the joints 112 and 114.
　このように、結合部１１１および結合部１１５Ａの間の巻線Ｗｐ、および結合部１１４および結合部１１５Ａの間の巻線Ｗｐには、電流は流れていないとみなせることを考慮し、巻線Ｗｐを、図９（Ａ）に示した巻き付け方から図９（Ｂ）に示した巻き付け方に変更することができる。この図９（Ｂ）において、例えば、結合部１１１の周囲では、図９（Ａ）と同様に、結合部１１１と結合部１１２との間に上向きの電流が流れ、結合部１１１と結合部１１３との間に左向きの電流が流れている。この図９（Ｂ）において、例えば、結合部１１４の周囲では、図９（Ａ）と同様に、結合部１１３と結合部１１４との間に下向きの電流が流れ、結合部１１２と結合部１１４との間に右向きの電流が流れている。よって、図９（Ｂ）に示したトランス２０Ａの巻線Ｗｐの巻き付け方は、図９（Ａ）に示したトランス２０の巻線Ｗｐの巻き付け方と等価である。 In this way, considering that no current can be considered to flow in the winding Wp between the joint 111 and the joint 115A, and between the joint 114 and the joint 115A, the winding Wp can be changed from the winding shown in FIG. 9(A) to the winding shown in FIG. 9(B). In FIG. 9(B), for example, around the joint 111, an upward current flows between the joint 111 and the joint 112, as in FIG. 9(A), and a leftward current flows between the joint 111 and the joint 113. In FIG. 9(B), for example, around the joint 114, a downward current flows between the joint 113 and the joint 114, as in FIG. 9(A), and a rightward current flows between the joint 112 and the joint 114. Therefore, the winding method of the winding Wp of the transformer 20A shown in FIG. 9(B) is equivalent to the winding method of the winding Wp of the transformer 20 shown in FIG. 9(A).
［変形例２］
　上記実施の形態では、図２，３に示したように、結合部１１５が２つの結合部１１５Ａ，１１５Ｂを含むようにしたが、これに限定されるものではない。これに代えて、例えば、図１０，１１に示すトランス２０Ｂのように、結合部１１５は３つ以上の結合部（この例では４つの結合部１１５Ａ～１１５Ｄ）を含んでもよい。ここで、結合部１１５Ａ～１１５Ｄは、本開示における「複数の部分結合部」の一具体例に対応する。これにより、基板２００における、トランス２０Ｂの外側の部分と、基板２００における基体部１０１，１０２に挟まれた部分とが、より多くの箇所で互いに接続されるので、構造上の安定性を高めることができる。 [Modification 2]
In the above embodiment, as shown in Figs. 2 and 3, the coupling portion 115 includes two coupling portions 115A and 115B, but this is not limited thereto. Instead, for example, as in the transformer 20B shown in Figs. 10 and 11, the coupling portion 115 may include three or more coupling portions (four coupling portions 115A to 115D in this example). Here, the coupling portions 115A to 115D correspond to a specific example of "plural partial coupling portions" in this disclosure. As a result, the outer portion of the transformer 20B and the portion of the substrate 200 sandwiched between the base portions 101 and 102 are connected to each other at more points, thereby improving structural stability.
［変形例３］
　上記の実施の形態では、図２，３に示したように、ＸＹ平面において、結合部１１１，１１４の断面積は、結合部１１２，１１３の断面積よりも小さいようにしたが、これに限定されるものではない。これに代えて、例えば図１２に示すトランス２０Ｃのように、結合部１１１～１１４の断面積を互いに等しくしてもよい。 [Modification 3]
In the above embodiment, as shown in Figures 2 and 3, the cross-sectional area of the coupling parts 111 and 114 in the XY plane is smaller than the cross-sectional area of the coupling parts 112 and 113, but this is not limited to this. Instead, the cross-sectional areas of the coupling parts 111 to 114 may be equal to each other, as in the transformer 20C shown in Figure 12, for example.
［変形例４］
　上記実施の形態では、ダイオードＤ１～Ｄ４を用いて整流回路１７を構成したが、これに限定されるものではなく、これに代えて、例えば、トランジスタを用いて整流回路を構成し、いわゆる同期整流を行うようにしてもよい。 [Modification 4]
In the above embodiment, the rectifier circuit 17 is configured using diodes D1 to D4, but this is not limited to this. Instead, for example, the rectifier circuit may be configured using transistors to perform so-called synchronous rectification.
［変形例５］
　上記の実施の形態では、図１に示したように、２つのトランジスタ１３，１４を有するスイッチング回路１２を設けたが、これに限定されるものではない。これに代えて、例えば、図１３に示す電力変換装置１Ｄのように、４つのトランジスタ２３～２６を有するスイッチング回路１２Ｄを設けてもよい。スイッチング回路１２Ｄは、いわゆるフルブリッジ型の回路であり、トランジスタ２３～２６を有している。トランジスタ２３～２６のそれぞれは、この例では、Ｎ型のＦＥＴである。トランジスタ２３のドレインは電圧線Ｌ１１に接続され、ゲートには図示しない制御部からゲート信号Ｇ１が供給され、ソースはトランジスタ２４のドレインおよびキャパシタ１５の一端に接続される。トランジスタ２４のドレインはトランジスタ２３のソースおよびキャパシタ１５の一端に接続され、ゲートには図示しない制御部からゲート信号Ｇ２が供給され、ソースは基準電圧線Ｌ１２に接続される。トランジスタ２５のドレインは電圧線Ｌ１１に接続され、ゲートには図示しない制御部からゲート信号Ｇ３が供給され、ソースはトランジスタ２６のドレインおよびトランス２０の接続端子Ｔｐ２に接続される。トランジスタ２６のドレインはトランジスタ２５のソースおよびトランス２０の接続端子Ｔｐ２に接続され、ゲートには図示しない制御部からゲート信号Ｇ４が供給され、ソースは基準電圧線Ｌ１２に接続される。 [Modification 5]
In the above embodiment, as shown in FIG. 1, the switching circuit 12 having two transistors 13 and 14 is provided, but the present invention is not limited to this. Instead of this, for example, a switching circuit 12D having four transistors 23 to 26 may be provided as in a power conversion device 1D shown in FIG. 13. The switching circuit 12D is a so-called full-bridge type circuit and has transistors 23 to 26. In this example, each of the transistors 23 to 26 is an N-type FET. The drain of the transistor 23 is connected to the voltage line L11, the gate is supplied with a gate signal G1 from a control unit (not shown), and the source is connected to the drain of the transistor 24 and one end of the capacitor 15. The drain of the transistor 24 is connected to the source of the transistor 23 and one end of the capacitor 15, the gate is supplied with a gate signal G2 from a control unit (not shown), and the source is connected to the reference voltage line L12. The drain of the transistor 25 is connected to the voltage line L11, the gate is supplied with a gate signal G3 from a control unit (not shown), and the source is connected to the drain of the transistor 26 and the connection terminal Tp2 of the transformer 20. The drain of the transistor 26 is connected to the source of the transistor 25 and the connection terminal Tp2 of the transformer 20, the gate receives a gate signal G4 from a control unit (not shown), and the source is connected to the reference voltage line L12.
［変形例６］
　上記実施の形態では、図１に示したように、整流回路１７およびトランス２０は、センタータップ型の回路を構成したが、これに限定されるものではない。以下に、本変形例について詳細に説明する。 [Modification 6]
In the above embodiment, the rectifier circuit 17 and the transformer 20 constitute a center tap type circuit as shown in Fig. 1, but the present invention is not limited to this. The present modification will be described in detail below.
　図１４は、本変形例に係る電力変換装置１Ｅの一構成例を表すものである。電力変換装置１Ｅは、スイッチング回路１２Ｄと、トランス２０Ｅと、整流回路１７Ｅとを備えている。 FIG. 14 shows an example of the configuration of a power conversion device 1E according to this modified example. The power conversion device 1E includes a switching circuit 12D, a transformer 20E, and a rectifier circuit 17E.
スイッチング回路１２Ｄは、いわゆるフルブリッジ型の回路であり、図１３に示した回路と同じである。 The switching circuit 12D is a so-called full-bridge type circuit, and is the same as the circuit shown in Figure 13.
　トランス２０Ｅは、接続端子Ｔｐ１，Ｔｐ２，Ｔｓ１Ａ，Ｔｓ１Ｂ，Ｔｓ２Ａ，Ｔｓ２Ｂと、巻線Ｗｐ１，Ｗｐ２と、巻線Ｗｓ１１，Ｗｓ１２とを有している。接続端子Ｔｐ１はキャパシタ１５の他端に接続され、接続端子Ｔｐ２はトランジスタ２５のソースおよびトランジスタ２６のドレインに接続される。接続端子Ｔｓ１Ａ，Ｔｓ１Ｂ，Ｔｓ２Ａ，Ｔｓ２Ｂは、整流回路１７Ｅに接続される。巻線Ｗｓ１１，Ｗｓ１２は、トランス２０Ｅの２次側巻線である。巻線Ｗｓ１１の一端は接続端子Ｔｓ１Ａに接続され、他端は接続端子Ｔｓ１Ｂに接続される。巻線Ｗｓ１２の一端は接続端子Ｔｓ２Ａに接続され、他端は接続端子Ｔｓ２Ｂに接続される。ここで、巻線Ｗｓ１１，Ｗｓ１２は、本開示における「第２の巻線」の一具体例に対応する。 The transformer 20E has connection terminals Tp1, Tp2, Ts1A, Ts1B, Ts2A, and Ts2B, windings Wp1, Wp2, and windings Ws11 and Ws12. The connection terminal Tp1 is connected to the other end of the capacitor 15, and the connection terminal Tp2 is connected to the source of the transistor 25 and the drain of the transistor 26. The connection terminals Ts1A, Ts1B, Ts2A, and Ts2B are connected to the rectifier circuit 17E. The windings Ws11 and Ws12 are secondary windings of the transformer 20E. One end of the winding Ws11 is connected to the connection terminal Ts1A, and the other end is connected to the connection terminal Ts1B. One end of the winding Ws12 is connected to the connection terminal Ts2A, and the other end is connected to the connection terminal Ts2B. Here, the windings Ws11 and Ws12 correspond to a specific example of a "second winding" in this disclosure.
　図１５は、トランス２０Ｅの巻線の一構成例を表すものであり、図１５（Ａ）は第１層である配線層ＬＡ１を示し、図１５（Ｂ）は第２層である配線層ＬＡ２を示す。図１６は、電力変換装置１Ｅにおける巻線Ｗｐ（巻線Ｗｐ１，Ｗｓ１）および巻線Ｗｓ１１，Ｗｓ１２の一接続例を表すものである。この例では、巻線Ｗｐは配線層ＬＡ１（図１５（Ａ））に設けられ、巻線Ｗｓ１１，Ｗｓ１２は配線層ＬＡ２（図１５（Ｂ））に設けられる。図１５（Ｂ）に示したように、この例では、巻線Ｗｓ１１は、２つの結合部１１３，１１４に巻き付けられ、巻線Ｗｓ１２は、２つの結合部１１１，１１２に巻き付けられる。具体的には、巻線Ｗｓ１１は、接続端子Ｔｓ１Ａから接続端子Ｔｓ１Ｂに向かう方向において、結合部１１３に時計回りに１回巻き付けられ、結合部１１４に反時計回りに１回巻き付けられる。巻線Ｗｓ１２は、接続端子Ｔｓ２Ａから接続端子Ｔｓ２Ｂに向かう方向において、結合部１１１に反時計回りに１回巻き付けられ、結合部１１２に時計回りに１回巻き付けられる。 Figure 15 shows an example of the configuration of the windings of transformer 20E, where Figure 15(A) shows the first layer, wiring layer LA1, and Figure 15(B) shows the second layer, wiring layer LA2. Figure 16 shows an example of the connection of winding Wp (windings Wp1, Ws1) and windings Ws11, Ws12 in power conversion device 1E. In this example, winding Wp is provided in wiring layer LA1 (Figure 15(A)), and windings Ws11, Ws12 are provided in wiring layer LA2 (Figure 15(B)). As shown in Figure 15(B), in this example, winding Ws11 is wound around two coupling parts 113, 114, and winding Ws12 is wound around two coupling parts 111, 112. Specifically, the winding Ws11 is wound once clockwise around the coupling portion 113 in the direction from the connection terminal Ts1A to the connection terminal Ts1B, and once counterclockwise around the coupling portion 114. The winding Ws12 is wound once counterclockwise around the coupling portion 111 in the direction from the connection terminal Ts2A to the connection terminal Ts2B, and once clockwise around the coupling portion 112.
　整流回路１７Ｅ（図１４）は、いわゆるフルブリッジ型の整流回路であり、ダイオードＤ１１，Ｄ１２，Ｄ１３，Ｄ１４を有している。ダイオードＤ１１のアノードはダイオードＤ１２のカソードおよびトランス２０Ｅの接続端子Ｔｓ１Ａ，Ｔｓ２Ａに接続され、カソードは電圧線Ｌ２１に接続される。ダイオードＤ１２のアノードは基準電圧線Ｌ２２に接続され、カソードはダイオードＤ１１のアノードおよびトランス２０Ｅの接続端子Ｔｓ１Ａ，Ｔｓ２Ａに接続される。ダイオードＤ１３のアノードはダイオードＤ１４のカソードおよびトランス２０Ｅの接続端子Ｔｓ１Ｂ，Ｔｓ２Ｂに接続され、カソードは電圧線Ｌ２１に接続される。ダイオードＤ１４のアノードは基準電圧線Ｌ２２に接続され、カソードはダイオードＤ１３のアノードおよびトランス２０Ｅの接続端子Ｔｓ１Ｂ，Ｔｓ２Ｂに接続される。 The rectifier circuit 17E (FIG. 14) is a so-called full-bridge type rectifier circuit, and has diodes D11, D12, D13, and D14. The anode of the diode D11 is connected to the cathode of the diode D12 and the connection terminals Ts1A and Ts2A of the transformer 20E, and the cathode is connected to the voltage line L21. The anode of the diode D12 is connected to the reference voltage line L22, and the cathode is connected to the anode of the diode D11 and the connection terminals Ts1A and Ts2A of the transformer 20E. The anode of the diode D13 is connected to the cathode of the diode D14 and the connection terminals Ts1B and Ts2B of the transformer 20E, and the cathode is connected to the voltage line L21. The anode of the diode D14 is connected to the reference voltage line L22, and the cathode is connected to the anode of the diode D13 and the connection terminals Ts1B and Ts2B of the transformer 20E.
［その他の変形例］
　また、これらの変形例のうちの２以上を組み合わせてもよい [Other Modifications]
Two or more of these modifications may also be combined.
　以上、実施の形態および変形例を挙げて本発明を説明したが、本発明はこれらの実施の形態等には限定されず、種々の変形が可能である。 The present invention has been described above using embodiments and modifications, but the present invention is not limited to these embodiments and various modifications are possible.
　例えば、上記実施の形態では、図１に示したように、トランス２０に複数の２次側巻線である巻線Ｗｓ１～Ｗｓ４を設けたが、これに限定されるものではなく、例えば１つの２次側巻線を設けてもよい。 For example, in the above embodiment, as shown in FIG. 1, multiple secondary windings, Ws1 to Ws4, are provided on the transformer 20, but this is not limited thereto, and for example, a single secondary winding may be provided.
　例えば、上記実施の形態では、多層基板の配線層を用いて巻線を構成したが、これに限定されるものではなく、ワイヤを用いて巻線を構成してもよい。 For example, in the above embodiment, the windings are formed using the wiring layers of a multi-layer board, but this is not limited to this, and the windings may also be formed using wire.
　本明細書中に記載された効果はあくまで例示であり、本開示の効果は、本明細書中に記載された効果に限定されない。よって、本開示に関して、他の効果が得られてもよい。 The effects described in this specification are merely examples, and the effects of this disclosure are not limited to the effects described in this specification. Therefore, other effects may be obtained with respect to this disclosure.
　さらに、本開示は、以下の態様を取り得る。 Furthermore, the present disclosure may take the following forms:
（１）
　互いに対向する２つの基体部と、前記２つの基体部の対向面内に配置され、前記２つの基体部を磁気結合させる第１の結合部、第２の結合部、第３の結合部、第４の結合部、および第５の結合部を有し、前記第１の結合部および前記第２の結合部は第１の方向にこの順に並設され、前記第３の結合部および前記第４の結合部は前記第１の方向にこの順で並設され、前記第１の結合部および前記第３の結合部は第２の方向に並設され、前記第２の結合部および前記第４の結合部は前記第２の方向に並設され、前記第５の結合部は、前記第１の結合部、前記第２の結合部、前記第３の結合部、および前記第４の結合部の全体を囲むように設けられた磁気コアと、
　前記第１の結合部、前記第２の結合部、前記第３の結合部、および前記第４の結合部のうちの１以上に巻き付けられた第１の巻線と、
　前記第１の結合部、前記第２の結合部、前記第３の結合部、および前記第４の結合部のうちの１以上に巻き付けられた１または複数の第２の巻線と
　を備えた磁性部品。
（２）
　第１の接続端子と、第２の接続端子とをさらに備え、
　前記第１の巻線は、前記第１の接続端子から前記第２の接続端子に向かう方向において、前記第２の結合部および前記第３の結合部に第１の巻方向に巻き付けられた
　前記（１）に記載の磁性部品。
（３）
　第１の接続端子と、第２の接続端子とをさらに備え、
　前記第１の巻線は、前記第１の接続端子から前記第２の接続端子に向かう方向において、前記第１の結合部、前記第２の結合部、前記第３の結合部、および前記第４の結合部の全体に第１の巻方向に巻き付けられた第１の部分と、前記第１の結合部および前記第４の結合部のそれぞれに第２の巻方向に巻き付けられ、前記第２の結合部および前記第３の結合部のそれぞれに前記第１の巻方向に巻き付けられた第２の部分とを有する
　前記（１）に記載の磁性部品。
（４）
　前記第１の結合部の断面積および前記第４の結合部の断面積のそれぞれは、前記第２の結合部の断面積および前記第３の結合部の断面積のそれぞれより小さい
　前記（１）から（３）のいずれかに記載の磁性部品。
（５）
　前記第５の結合部は、複数の部分結合部を有する
　前記（１）から（４）のいずれかに記載の磁性部品。
（６）
　第３の接続端子と、第４の接続端子とをさらに備え、
　前記１または複数の第２の巻線は、前記第３の接続端子から前記第４の接続端子に向かう方向において、前記第１の結合部に第３の巻方向に巻き付けられ、前記第２の結合部に第４の巻方向に巻き付けられた巻線を含む
　前記（１）から（５）のいずれかに記載の磁性部品。
（７）
　前記（１）から（６）のいずれかに記載の磁性部品と、
　前記磁性部品の前記第１の巻線に接続され、１または複数のスイッチング素子を有するスイッチング回路と、
　前記磁性部品の前記１または複数の第２の巻線に接続された整流回路と、
　前記整流回路に接続された平滑回路と
　を備えた電力変換装置。
 
 
  (1)
a magnetic core having two base parts facing each other, and a first coupling part, a second coupling part, a third coupling part, a fourth coupling part, and a fifth coupling part that are arranged on opposing surfaces of the two base parts and magnetically couple the two base parts, the first coupling part and the second coupling part being arranged side by side in this order in a first direction, the third coupling part and the fourth coupling part being arranged side by side in this order in the first direction, the first coupling part and the third coupling part being arranged side by side in a second direction, the second coupling part and the fourth coupling part being arranged side by side in the second direction, and the fifth coupling part being provided to surround the entirety of the first coupling part, the second coupling part, the third coupling part, and the fourth coupling part;
a first winding wound around one or more of the first coupling portion, the second coupling portion, the third coupling portion, and the fourth coupling portion;
and one or more second windings wound around one or more of the first coupling portion, the second coupling portion, the third coupling portion, and the fourth coupling portion.
(2)
Further comprising a first connection terminal and a second connection terminal,
The magnetic component described in (1), wherein the first winding is wound around the second coupling portion and the third coupling portion in a first winding direction in a direction from the first connection terminal toward the second connection terminal.
(3)
Further comprising a first connection terminal and a second connection terminal,
The magnetic component described in (1), wherein the first winding has, in a direction from the first connection terminal toward the second connection terminal, a first portion wound in a first winding direction around the first coupling portion, the second coupling portion, the third coupling portion, and the fourth coupling portion, and a second portion wound in a second winding direction around each of the first coupling portion and the fourth coupling portion, and wound in the first winding direction around each of the second coupling portion and the third coupling portion.
(4)
The magnetic component according to any one of (1) to (3), wherein a cross-sectional area of the first coupling portion and a cross-sectional area of the fourth coupling portion are smaller than a cross-sectional area of the second coupling portion and a cross-sectional area of the third coupling portion, respectively.
(5)
The magnetic component according to any one of (1) to (4), wherein the fifth joint portion has a plurality of partial joint portions.
(6)
Further comprising a third connection terminal and a fourth connection terminal;
The magnetic component described in any one of (1) to (5), wherein the one or more second windings include a winding wound in a third winding direction around the first coupling portion and in a fourth winding direction around the second coupling portion in a direction from the third connection terminal toward the fourth connection terminal.
(7)
A magnetic component according to any one of (1) to (6) above;
a switching circuit connected to the first winding of the magnetic component and having one or more switching elements;
a rectifier circuit connected to the one or more second windings of the magnetic component;
A power conversion device comprising: a smoothing circuit connected to the rectifier circuit.

Claims (7)

  1. 　互いに対向する２つの基体部と、前記２つの基体部の対向面内に配置され、前記２つの基体部を磁気結合させる第１の結合部、第２の結合部、第３の結合部、第４の結合部、および第５の結合部を有し、前記第１の結合部および前記第２の結合部は第１の方向にこの順に並設され、前記第３の結合部および前記第４の結合部は前記第１の方向にこの順で並設され、前記第１の結合部および前記第３の結合部は第２の方向に並設され、前記第２の結合部および前記第４の結合部は前記第２の方向に並設され、前記第５の結合部は、前記第１の結合部、前記第２の結合部、前記第３の結合部、および前記第４の結合部の全体を囲むように設けられた磁気コアと、
    　前記第１の結合部、前記第２の結合部、前記第３の結合部、および前記第４の結合部のうちの１以上に巻き付けられた第１の巻線と、
    　前記第１の結合部、前記第２の結合部、前記第３の結合部、および前記第４の結合部のうちの１以上に巻き付けられた１または複数の第２の巻線と
    　を備えた磁性部品。     a magnetic core having two base parts facing each other, and a first coupling part, a second coupling part, a third coupling part, a fourth coupling part, and a fifth coupling part that are arranged on opposing surfaces of the two base parts and magnetically couple the two base parts, the first coupling part and the second coupling part being arranged side by side in this order in a first direction, the third coupling part and the fourth coupling part being arranged side by side in this order in the first direction, the first coupling part and the third coupling part being arranged side by side in a second direction, the second coupling part and the fourth coupling part being arranged side by side in the second direction, and the fifth coupling part being provided to surround the entirety of the first coupling part, the second coupling part, the third coupling part, and the fourth coupling part;
    a first winding wound around one or more of the first coupling portion, the second coupling portion, the third coupling portion, and the fourth coupling portion;
    and one or more second windings wound around one or more of the first coupling portion, the second coupling portion, the third coupling portion, and the fourth coupling portion.
  2. 　第１の接続端子と、第２の接続端子とをさらに備え、
    　前記第１の巻線は、前記第１の接続端子から前記第２の接続端子に向かう方向において、前記第２の結合部および前記第３の結合部に第１の巻方向に巻き付けられた
    　請求項１に記載の磁性部品。     Further comprising a first connection terminal and a second connection terminal,
    The magnetic component according to claim 1 , wherein the first winding is wound in a first winding direction around the second coupling portion and the third coupling portion in a direction from the first connection terminal toward the second connection terminal.
  3. 　第１の接続端子と、第２の接続端子とをさらに備え、
    　前記第１の巻線は、前記第１の接続端子から前記第２の接続端子に向かう方向において、前記第１の結合部、前記第２の結合部、前記第３の結合部、および前記第４の結合部の全体に第１の巻方向に巻き付けられた第１の部分と、前記第１の結合部および前記第４の結合部のそれぞれに第２の巻方向に巻き付けられ、前記第２の結合部および前記第３の結合部のそれぞれに前記第１の巻方向に巻き付けられた第２の部分とを有する
    　請求項１に記載の磁性部品。     Further comprising a first connection terminal and a second connection terminal,
    2. The magnetic component according to claim 1, wherein the first winding has, in a direction from the first connection terminal toward the second connection terminal, a first portion wound in a first winding direction around the first coupling portion, the second coupling portion, the third coupling portion, and the fourth coupling portion, and a second portion wound in a second winding direction around each of the first coupling portion and the fourth coupling portion, and wound in the first winding direction around each of the second coupling portion and the third coupling portion.
  4. 　前記第１の結合部の断面積および前記第４の結合部の断面積のそれぞれは、前記第２の結合部の断面積および前記第３の結合部の断面積のそれぞれより小さい
    　請求項１に記載の磁性部品。     The magnetic component according to claim 1 , wherein a cross-sectional area of the first coupling portion and a cross-sectional area of the fourth coupling portion are smaller than a cross-sectional area of the second coupling portion and a cross-sectional area of the third coupling portion, respectively.
  5. 　前記第５の結合部は、複数の部分結合部を有する
    　請求項１に記載の磁性部品。     The magnetic component according to claim 1 , wherein the fifth joint portion has a plurality of partial joint portions.
  6. 　第３の接続端子と、第４の接続端子とをさらに備え、
    　前記１または複数の第２の巻線は、前記第３の接続端子から前記第４の接続端子に向かう方向において、前記第１の結合部に第３の巻方向に巻き付けられ、前記第２の結合部に第４の巻方向に巻き付けられた巻線を含む
    　請求項１に記載の磁性部品。     Further comprising a third connection terminal and a fourth connection terminal;
    2. The magnetic component according to claim 1, wherein the one or more second windings include a winding wound in a third winding direction around the first coupling portion and in a fourth winding direction around the second coupling portion in a direction from the third connection terminal toward the fourth connection terminal.
  7. 　請求項１から請求項６のいずれか一項に記載の磁性部品と、
    　前記磁性部品の前記第１の巻線に接続され、１または複数のスイッチング素子を有するスイッチング回路と、
    　前記磁性部品の前記１または複数の第２の巻線に接続された整流回路と、
    　前記整流回路に接続された平滑回路と
    　を備えた電力変換装置。
          A magnetic component according to any one of claims 1 to 6;
    a switching circuit connected to the first winding of the magnetic component and having one or more switching elements;
    a rectifier circuit connected to the one or more second windings of the magnetic component;
    A power conversion device comprising: a smoothing circuit connected to the rectifier circuit.
PCT/JP2022/039509 2022-10-24 2022-10-24 Magnetic component and power conversion device WO2024089738A1 (en)

Priority Applications (1)

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Application Number Priority Date Filing Date Title
PCT/JP2022/039509 WO2024089738A1 (en) 2022-10-24 2022-10-24 Magnetic component and power conversion device

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09120910A (en) * 1995-10-24 1997-05-06 Nagano Japan Radio Co Inductor and core thereof
JP2019029677A (en) * 2017-08-03 2019-02-21 デルタ エレクトロニクス インコーポレイティド Magnetic module and power conversion device using the same
JP2022086183A (en) * 2020-11-30 2022-06-09 Tdk株式会社 Magnetic component, power conversion device, and power conversion system

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09120910A (en) * 1995-10-24 1997-05-06 Nagano Japan Radio Co Inductor and core thereof
JP2019029677A (en) * 2017-08-03 2019-02-21 デルタ エレクトロニクス インコーポレイティド Magnetic module and power conversion device using the same
JP2022086183A (en) * 2020-11-30 2022-06-09 Tdk株式会社 Magnetic component, power conversion device, and power conversion system

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