TWI577120B - Can reduce the output inductance volume of high power power supply device - Google Patents

Description

High-power power supply device capable of reducing output inductor volume

The present invention relates to a power supply device, and more particularly to a high power power supply device that can reduce the volume of an output inductor.

Referring to FIG. 12, the equivalent circuit of the conventional power supply mainly includes a rectifier 40, a primary side circuit 41, a secondary side circuit 42, a transformer 43 and a feedback circuit 44, the rectifier 40, the primary side circuit 41, The transformer 43 is sequentially connected to the secondary side circuit 42 which is connected to an input terminal of the feedback circuit 44, and the primary side circuit 41 is connected to an output terminal of the feedback circuit 44. The rectifier 40 has a power input terminal VAC for receiving a mains power supply, and the rectifier 40, the primary side circuit 41, the transformer 43 and the secondary side circuit 42 convert the mains power into a DC power source and then output from a power output terminal VDC. The secondary side circuit 42 includes an output inductor as an energy storage element.

Referring to FIG. 13 , the transformer 43 is exemplified by a central tapped transformer. The secondary winding 430 includes a first contact A, a second contact B and a common contact N. The secondary circuit 42 includes a a first diode D1, a second diode D2, an output inductor L and a capacitor C. The cathodes of the first diode D1 and the second diode D2 are respectively connected to the second winding 430. a contact A and a second contact B, and the anode is respectively connected to a ground GND, the output inductor L is connected between the common contact N and the power output VDC, the capacitor C is connected to the power output VDC and Between ground GND. In order to increase the output power of the power supply, it is conventional practice to increase the output current Io of the secondary side circuit 42. On the other hand, the output inductor L is required to withstand a large power output. The structure of the output inductor L includes a core and a coil, and the coil is disposed on the core and passes the output current Io. As the output current Io increases, the resulting magnetic flux also increases correspondingly, so the volume of the core must be Increasing to expand the flux path to avoid flux saturation, but the overall size of the power supply can not be further reduced.

Referring to FIG. 14, another conventional power supply adopts a transformer 43 having a first secondary winding 431 and a second secondary winding 432, and the secondary windings 431 and 432 are respectively connected to a first time. The circuit structure of the side circuit 421 and the second secondary circuit 422 and the secondary circuits 421 and 422 are the same as those of the secondary circuit 42 of FIG. 13 , and will not be described herein, and the first secondary side of FIG. 14 . The output end of the circuit 421 is connected to the output end of the second secondary circuit 422, so that the output current Io of the secondary side circuits 421, 422 is converged, so that the output current It of the power supply is such The secondary side circuits 421, 422 output the sum of the currents Io, thereby boosting the output power of the power supply. Since the power supply does not directly increase the output current Io of each of the secondary side circuits 421 and 422, it is not necessary to increase the volume of each of the output inductors L. However, the power supply has two output inductors L. When the output inductors L are disposed on the circuit board, they still occupy a certain space because they are respectively disposed at different positions, which not only limits the degree of reduction of the overall volume of the power supply, but also increases Component cost.

In view of this, the main purpose of this creation is to provide a high-power power supply device that can reduce the volume of the output inductor.

The high-power power supply device capable of reducing the output inductor volume comprises: a transformer; a secondary circuit connected to the secondary winding of the transformer, the secondary circuit comprising a power output end and an output inductor component, The output inductor component includes: a magnetic base; a first coil is disposed on the magnetic base, and the first coil serves as a first output inductor connected to the output end of the power source; A second coil is disposed on the magnetic base and coupled to the first coil. The second coil serves as a second output inductor connected to the output end of the power source. The first coil and the second coil generate a magnetic field opposite to each other.

According to the structure of the present invention, since the first coil and the second coil are coupled to each other and the direction of the generated magnetic field is opposite, the direct current component of the magnetic field generated by the first coil and the magnetic field generated by the second coil cancels each other on the magnetic base. Effectively reducing the overall magnetic flux of the magnetic pedestal to reduce the thickness of the magnetic pedestal, thereby reducing the volume of the output inductor component, so the output inductor component of the present invention can withstand high power output under a limited volume In addition, the output inductor component is a single component, and the first output inductor and the second output inductor can be equivalent by a single component, so that two inductors are used compared to the prior art, and the creation requires only a small amount. Space to set the output inductor component, in summary, the volume of the author of the power supply device can be effectively reduced.

11‧‧‧Rectifier

12‧‧‧Transformers

120‧‧‧secondary winding

121‧‧‧First secondary winding

122‧‧‧second secondary winding

123‧‧‧ Third secondary winding

124‧‧‧ fourth secondary winding

131‧‧‧primary circuit

132‧‧‧secondary circuit

133‧‧‧First full bridge rectifier circuit

134‧‧‧Second full bridge rectifier circuit

14‧‧‧Return circuit

20‧‧‧Output inductor components

21‧‧‧magnetic base

201‧‧‧ first side

202‧‧‧Second side

203‧‧‧ third side

204‧‧‧ fourth side

210‧‧‧floor

211‧‧‧First side panel

212‧‧‧Second side panel

213‧‧‧First cylinder

214‧‧‧Second cylinder

221‧‧‧First coil

222‧‧‧second coil

31‧‧‧First magnetic field

32‧‧‧second magnetic field

40‧‧‧Rectifier

41‧‧‧primary circuit

42‧‧‧secondary circuit

421‧‧‧First secondary circuit

422‧‧‧second secondary circuit

43‧‧‧Transformers

430‧‧‧secondary winding

431‧‧‧First secondary winding

432‧‧‧second secondary winding

44‧‧‧Return circuit

Figure 1: Schematic block diagram of the power supply device of the present invention.

Figure 2: Schematic diagram of the stereoscopic appearance of the magnetic base of the output inductor assembly in this creation.

Figure 3: A top plan view of the output inductor assembly in this creation.

Figure 4 is a circuit diagram showing the transformer and the secondary side circuit in the first preferred embodiment of the present power supply device.

Fig. 5 is a circuit diagram showing a transformer and a secondary side circuit in a second preferred embodiment of the present power supply device.

Figure 6 is a circuit diagram showing a transformer and a secondary side circuit in a third preferred embodiment of the present power supply device.

Fig. 7 is a circuit diagram showing a transformer and a secondary side circuit in a fourth preferred embodiment of the present power supply device.

Figure 8 is a circuit diagram showing a transformer and a secondary side circuit in a fifth preferred embodiment of the present power supply device.

Figure 9 is a circuit diagram showing a transformer and a secondary side circuit in a sixth preferred embodiment of the present power supply device.

Figure 10: Schematic diagram of the magnetic field distribution of the first coil and the second coil of the output inductor assembly in the present invention.

Figure 11 is a circuit diagram showing the first leakage inductance and the second leakage inductance of the secondary side circuit in the sixth preferred embodiment of the present power supply device.

Figure 12: Schematic block diagram of a conventional power supply.

Figure 13: Circuit diagram of a transformer and secondary circuit in a conventional power supply (1).

Figure 14: Circuit diagram of the transformer and secondary circuit in the conventional power supply (2).

Referring to FIG. 1, the equivalent circuit of the present power supply device includes a rectifier 11, a transformer 12, a primary side circuit 131, a secondary side circuit 132, and a feedback circuit 14. The transformer 12 has a primary side winding and a secondary side winding. The primary side circuit 131 is connected between the rectifier 11 and the primary side winding of the transformer 12. The rectifier 11 and the primary side circuit 131 function as an AC/DC conversion circuit. The primary side circuit 131 includes an electronic switch that controls the primary side winding of the transformer 12 to be turned on or open. The secondary side circuit 132 is connected to the secondary side winding of the transformer 12 as a DC/DC converter circuit. The secondary side circuit 132 includes a power output terminal, a ground terminal and an output inductor component. The rectifier 11 receives a mains power supply VAC, and the rectifier 11, the primary side circuit 131, the transformer 12 and the secondary side circuit 132 convert the mains power supply VAC into a DC power source VDC from the secondary side circuit 132. Power output output. An input end and an output end of the feedback circuit 14 are respectively connected to the secondary side circuit 132 and the primary side circuit 131. The feedback circuit 14 detects the voltage and current of the secondary side circuit 132, and detects the result. Returning to the primary side circuit 131, the primary side circuit The control unit controls the conduction period of the electronic switch according to the detection result to adjust the power factor and stabilize the output voltage and current.

Referring to FIG. 2 and FIG. 3 , the output inductor assembly 20 of the secondary circuit 132 includes a magnetic base 21 , a first coil 221 and a second coil 222 . The magnetic base 21 can be a core or other member made of a magnetic material, and includes a bottom plate 210, a first side plate 211, a second side plate 212, a first column 213 and a second column. The first side plate 211 and the second side plate 212 are respectively disposed on opposite sides of the bottom plate 210. The first column 213 and the second column 214 are juxtaposed on the surface of the bottom plate 210 and located on the first side plate. 211 is disposed between the second side plate 212 and the second side plate 212. In the preferred embodiment, the bottom plate 210 can be rectangular and includes a first side 201, a second side 202, and a third side 203. The first side plate 211 and the second side plate 212 are respectively disposed on the first side edge 201 and the third side edge 203, and the first column body 213 is adjacent to the second side edge 202, the second side The cylinder 214 is adjacent to the fourth side 204. The first coil 221 is wound around the first cylinder 213. The second coil 222 is wound around the second cylinder 214 and coupled to the first coil. It should be noted that the first coil 221 and the first coil The current directions of the two coils 222 are opposite to each other, so that the directions of the generated magnetic fields are opposite to each other. In the preferred embodiment, the first coil 221 is wound from the top of the first cylinder 213 to the bottom in a first direction, and the second coil 222 is in a second direction from the second pillar 214. The top of the first coil is opposite to the second direction. The first view of FIG. 3 is taken as an example. When the first direction of the first coil 221 is counterclockwise, the second coil 222 is The second direction is a clockwise direction; conversely, when the first direction is a clockwise direction, the second direction is a counterclockwise direction. The current input terminals IN of the first coil 221 and the second coil 222 are respectively located at the top of the first column 213 and the second column 214, and the current output ends OUT are respectively located at the first column 213 and the second column. At the bottom of 214, the opposite magnetic field is generated by the current directions of the first coil 221 and the second coil 222 being opposite to each other.

Referring to the first preferred embodiment shown in FIG. 4, the secondary winding 120 of the transformer 12 includes a first contact A and a second contact B. The secondary circuit 132 includes a first diode. body D1, a second diode D2, a first output inductor L1, a second output inductor L2 and a capacitor C. The cathodes of the first diode D1 and the second diode D2 are respectively connected to the first contact A and the second contact B, and the anodes are respectively connected to the ground GND, and the first output inductor L1 is connected to the first Between a contact A and the power output VDC, the second output inductor L2 is connected between the second contact B and the power output terminal VDC, and the capacitor C is connected to the power output terminal VDC and the ground GND between. The first coil 221 and the second coil 222 shown in FIG. 3 are equivalent to the first output inductor L1 and the second output inductor L2, respectively.

Referring to the second preferred embodiment shown in FIG. 5, the transformer 12 is a center-tapped transformer and has a first secondary winding 121 and a second secondary winding 122, and each secondary winding 121, 122 A first contact A, a second contact B and a common contact N are included. The secondary circuit 132 includes a first diode D1, a second diode D2, and a third diode. D3, a fourth diode D4, a first output inductor L1, a second output inductor L2 and a capacitor C. The cathodes of the first diode D1 and the second diode D2 are respectively connected to the first two The first contact A and the second contact B of the secondary winding 121, the cathodes of the third diode D3 and the fourth diode D4 are respectively connected to the first contact A of the second secondary winding 122 and The second contact B, the anodes of the diodes D1 D D4 are connected to the ground GND, the first output inductor L1 is connected to the common contact N of the first secondary winding 121 and the power output VDC The second output inductor L2 is connected between the common contact N of the second secondary winding 122 and the power output terminal VDC. The capacitor C is connected to the power output terminal VDC and ground. Between the ends GND. The first coil 221 and the second coil 222 shown in FIG. 3 are equivalent to the first output inductor L1 and the second output inductor L2, respectively.

Referring to the third preferred embodiment shown in FIG. 6, the transformer 12 has a first secondary winding 121 and a second secondary winding 122. Each secondary winding 121, 122 includes a first contact. A and a second contact B. The secondary side circuit 132 includes a first diode D1, a second diode D2, a third diode D3, a fourth diode D4, a first output inductor L1, and a second output. The inductor L2 and a capacitor C, the anodes of the first diode D1 and the second diode D2 are respectively connected to the first two The first contact A and the second contact B of the side winding 121 are connected to each other, and the anodes of the third diode D3 and the fourth diode D4 are respectively connected to the first of the second secondary windings 122. a contact A and a second contact B, and the cathodes are connected to each other, and the second contacts B of the first and second secondary windings 121 and 122 are respectively connected to the ground GND, and the first output inductor L1 is connected to the Between the cathodes of the first and second diodes D1, D2 and the power output terminal VDC, the second output inductor L2 is connected to the cathodes of the third and fourth diodes D3, D4 and the power output terminal VDC The capacitor C is connected between the power output terminal VDC and the ground GND. The first coil 221 and the second coil 222 shown in FIG. 3 are equivalent to the first output inductor L1 and the second output inductor L2, respectively.

Referring to the fourth preferred embodiment shown in FIG. 7, the transformer 12 has a first secondary winding 121 and a second secondary winding 122. Each secondary winding 121, 122 includes a first contact. A and a second contact B. The secondary side circuit 132 includes a first full bridge rectifier circuit 133, a second full bridge rectifier circuit 134, a first output inductor L1, a second output inductor L2, and a capacitor C. The first full bridge rectifier circuit The first input end a1 and the second input end a2 of the 133 are respectively connected to the first contact A and the second contact B of the first secondary winding 121, and the first output inductor L1 is connected to the first full bridge rectification. Between the first output terminal b1 of the circuit 133 and the power output terminal VDC, the first input end a1 and the second input end a2 of the second full bridge rectifier circuit 134 are respectively connected to the first of the second secondary windings 122 The second output inductor L2 is connected between the first output terminal b1 of the second full bridge rectifier circuit 134 and the power output terminal VDC, and the first and second full bridge rectifiers are connected. The second output terminal b2 of the circuit 133, 134 is respectively connected to the ground GND, and the capacitor C is connected between the power output terminal VDC and the ground GND. The first coil 221 and the second coil 222 shown in FIG. 3 are equivalent to the first output inductor L1 and the second output inductor L2, respectively.

Referring to the fifth preferred embodiment shown in FIG. 8, the transformer 12 has a first secondary winding 121 and a second secondary winding 122. Each secondary winding 121, 122 includes a first contact. A, a second contact B and a common contact N. The secondary side circuit 132 includes a first diode D1. a second diode D2, a third diode D3, a fourth diode D4, a first output inductor L1, a second output inductor L2, a first capacitor C1 and a second capacitor C2, The cathodes of the first diode D1 and the second diode D2 are respectively connected to the first contact A and the second contact B of the first secondary winding 121, and the third diode D3 and the fourth two The cathodes of the poles D4 are respectively connected to the first contacts A and the second contacts B of the second secondary windings 122. The anodes of the diodes D1 to D4 are respectively connected to the ground GND, the first output inductor L1 is connected between the common contact N of the first secondary winding 121 and the power output terminal VDC, and the second output inductor L2 is connected to the common contact N of the second secondary winding 122 and the power output. The first capacitor C1 and the second capacitor C2 are respectively connected between the power output terminal VDC and the ground GND. The first coil 221 and the second coil 222 shown in FIG. 3 are equivalent to the first output inductor L1 and the second output inductor L2, respectively.

Referring to the sixth preferred embodiment shown in FIG. 9, the transformer 12 has a first secondary winding 121, a second secondary winding 122, a third secondary winding 123, and a fourth secondary The side windings 124, the secondary side windings 121-124 have a first contact A and a second contact B, respectively. The secondary side circuit 132 includes a first diode D1, a second diode D2, a third diode D3, a fourth diode D4, a first output inductor L1, and a second output. The inductor L2 is coupled to a capacitor C. The cathode of the first diode D1 is connected to the first junction A of the first secondary winding 121, and the cathode of the second diode D2 is connected to the third secondary winding 123. The first contact A, the cathode of the third diode D3 is connected to the second contact B of the second secondary winding 122, and the fourth diode D4 is connected to the fourth secondary winding 124. The second contact B, the anodes of the diodes D1 D D4 are respectively connected to the ground GND, and the first output inductor L1 is connected to the first contact A of the second and fourth secondary windings 122, 124 and the The second output inductor L2 is connected between the second contact B of the first and third secondary windings 121, 123 and the power output VDC, and the capacitor C is connected to the power supply. Between the output terminal VDC and the ground terminal GND. The first coil 221 and the second coil 222 shown in FIG. 3 are equivalent to the first output inductor L1 and the second output inductor L2, respectively.

In the first to sixth embodiments shown in FIG. 4 to FIG. 9 , when the present power supply device operates, a first current I1 is output through the first output inductor L1, and is output through the second output inductor L2. a second current I2, because the first output inductor L1 and the second output inductor L2 are both connected to the power output terminal VDC, so the first current I1 and the second current I2 are converged, and thus, the power supply device The total output current I3 is the sum of the first current I1 and the second current I2, thereby increasing the output power of the power supply device.

Referring to FIG. 3, according to the structure of the output inductor assembly 20, the first coil 221 and the second coil 222 are disposed on the same magnetic base 21, and when the present power supply device operates, the first coil The second coil 222 is simultaneously excited and has the same phase, and the first coil 221 and the second coil 222 are coupled to each other and generate a magnetic field in the opposite direction. Referring to FIG. 10 , a schematic diagram of the magnetic field strength of the first coil 221 and the second coil 222 on the first side plate 211 is generated. The magnetic field phenomenon of the second side plate 212 can be analogized. The length of the arrow shown in FIG. 10 represents the strength of the magnetic field, the direction of the first magnetic field 31 of the first coil 221 is from top to bottom, and the intensity decreases as moving away from the first coil 221, and the second coil is oppositely The direction of the second magnetic field 32 of 222 is from bottom to top, and the intensity decreases as it moves away from the second coil 222. It can be seen that the DC component of the magnetic flux in the first magnetic field 31 and the second magnetic field 32 in the present invention can cancel each other at the first side plate 211 and the second side plate 212 of the magnetic pedestal 21, thereby effectively reducing the The magnetic flux of the magnetic base 21 on the first side plate 211 and the second side plate 212.

Please refer to Appendix I for the magnetic flux simulation result of the output inductor assembly 20. The first side plate 211 and the second side plate 212 do have a lower magnetic flux (blue distribution) and are not saturated; please refer to Appendix II. The first coil 221 and the second coil 222 generate simulation results of the same magnetic field direction. It can be seen that the magnetic fluxes of the first side plate 211 and the second side plate 212 are relatively high and saturated (red distribution). As can be seen from the comparison of the first and second attachments, the first coil 221 and the second coil 222 generate a magnetic field in the opposite direction, which can reduce the overall magnetic flux of the first side plate 211 and the second side plate 212.

As described above, since the DC component of the magnetic flux in the first magnetic field 31 and the second magnetic field 32 cancels each other at the first side plate 211 and the second side plate 212 of the magnetic pedestal 21, the overall magnetic flux is reduced. The thickness of the first side plate 211 and the second side plate 212 (or the cross-sectional area through which the magnetic lines pass) can be reduced correspondingly, so that the volume of the output inductor component 20 can be effectively reduced, so the output inductor component 20 can be in a limited volume. Understand high power output. In addition, because the present invention causes the DC component of the magnetic flux in the first magnetic field 31 and the second magnetic field 32 to be eliminated in the first side plate 211 and the second side plate 212 without leaking, the output inductor component 20 does not affect the peripheral components. Operation.

On the other hand, the first coil 221 and the second coil 222 are coupled to each other to generate leakage inductance, which is beneficial to the present power supply device. Taking the sixth preferred embodiment as an example, please refer to FIG. 11 , the output inductor component 20 generates a first leakage inductance La and a second leakage inductance Lb, and the first output inductor L1 is connected in series with the first leakage inductance La, The second output inductor L2 is connected in series with the second leakage inductance Lb to increase the overall output inductance of the secondary side circuit 132. The relationship between the inductance current and the time-dependent relationship of the secondary side circuit 132 is continuous, so that the electronic switching of the primary side circuit 131 has a function of soft switching, which makes the switching operation of the electronic switch more efficient.

12‧‧‧Transformers

121‧‧‧First secondary winding

122‧‧‧second secondary winding

132‧‧‧secondary circuit

Claims (11)

A high-power power supply device capable of reducing an output inductor volume, comprising: a transformer; a secondary circuit connected to a secondary winding of the transformer, the secondary circuit comprising a power output end and an output inductor component, The output inductor component comprises: a magnetic base; a first coil is disposed on the magnetic base, the first coil is a first output inductor connected to the output end of the power source; and a second coil is disposed on the guide a magnetic base coupled to the first coil, the second coil being a second output inductor connected to the output end of the power source, the first coil and the second coil generating a magnetic field opposite to each other; wherein the magnetic base includes a bottom plate, a first side plate, a second side plate, a first column and a second column. The bottom plate is rectangular and includes a first side, a second side, and a third The first side plate and the second side plate are respectively disposed opposite to the first side plate and the third side side, and the first column body and the second column body are juxtaposed on the bottom plate. Surface and located on the first side panel Between the second side plates, wherein the first column is adjacent to the second side, the second column is adjacent to the fourth side; the first coil is wound around the first column, and the second coil is wound In the second cylinder. The high-power power supply device capable of reducing the output inductor volume according to claim 1, wherein the output inductor component generates a first leakage inductance and a second leakage inductance, the first output inductance being connected in series with the first leakage inductance, the second The output inductor is connected in series with the second leakage inductance. The high-power power supply device capable of reducing the output inductor volume according to claim 2, wherein the first coil is wound from a top of the first cylinder to a bottom in a first direction, and the second coil is a second The direction is wound from the top of the second cylinder to the bottom, the first direction being opposite to the second direction, the first The current input ends of the first coil and the second cylinder are respectively located at the top of the first cylinder and the second cylinder, and the current output ends are respectively located at the bottom of the first cylinder and the second cylinder. The high power power supply device capable of reducing the output inductor volume as claimed in claim 3, wherein the first direction is a counterclockwise direction and the second direction is a clockwise direction. The high-power power supply device capable of reducing the output inductor volume as claimed in claim 3, wherein the first direction is a clockwise direction and the second direction is a counterclockwise direction. The high-power power supply device capable of reducing the output inductor volume according to any one of claims 1 to 5, wherein the secondary side winding of the transformer includes a first contact and a second contact; the secondary circuit includes a first diode, a second diode, the first output inductor, the second output inductor and a capacitor, wherein the first diode and the cathode of the second diode are respectively connected to the first contact And a second contact, wherein the anode is respectively connected to a ground, the first output inductor is connected between the first contact and the power output, the second output inductor is connected to the second contact and the power output Between the terminals, the capacitor is connected between the power output end and the ground. The high-power power supply device capable of reducing the output inductor volume according to any one of claims 1 to 5, wherein the transformer has a first secondary winding and a second secondary winding, and each secondary winding includes one a first contact, a second contact, and a common contact; the secondary circuit includes a first diode, a second diode, a third diode, and a fourth diode. The first output inductor, the second output inductor and a capacitor, the first diode and the cathode of the second diode are respectively connected to the first contact and the second contact of the first secondary winding, The cathodes of the third diode and the fourth diode are respectively connected to the first contact and the second contact of the second secondary winding, and the anodes of the first to fourth diodes are connected to a ground. a first output inductor is connected between the common contact of the first secondary winding and the power output, and the second output inductor is connected between the common contact of the second secondary winding and the power output The capacitor is connected between the output end of the power supply and the ground. The high-power power supply device capable of reducing the output inductor volume according to any one of claims 1 to 5, wherein the transformer has a first secondary winding and a second secondary winding, and each secondary winding includes one a first contact and a second contact; the secondary circuit includes a first diode, a second diode, a third diode, a fourth diode, and the first output inductor The second output inductor and a capacitor, the anodes of the first diode and the second diode are respectively connected to the first contact and the second contact of the first secondary winding, and the cathodes are connected to each other, The anodes of the third diode and the fourth diode are respectively connected to the first contact and the second contact of the second secondary winding, and the cathodes are connected to each other, and the first and second secondary windings are connected The two contacts are respectively connected to a ground end, the first output inductor is connected between the cathodes of the first and second diodes connected to each other and the power output end, and the second output inductor is connected to the third and fourth ends. Between the cathodes of the diodes connected to each other and the output end of the power source, the capacitor is connected to the power source Between the terminal and the ground terminal. The high-power power supply device capable of reducing the output inductor volume according to any one of claims 1 to 5, wherein the transformer has a first secondary winding and a second secondary winding, and each secondary winding includes one a first contact and a second contact; the secondary circuit includes a first full bridge rectifier circuit, a second full bridge rectifier circuit, the first output inductor, the second output inductor and a capacitor, the first A first input end and a second input end of a full bridge rectifier circuit are respectively connected to the first contact and the second contact of the first secondary winding, and the first output inductor is connected to the first full bridge rectification Between a first output end of the circuit and the power output end, a first input end and a second input end of the second full bridge rectifying circuit are respectively connected to the first contact point and the second second side winding a second contact, the second output inductor is connected between a first output end of the second full bridge rectifier circuit and the power output end, and a second output end of the first and second full bridge rectifier circuits are respectively connected a ground terminal, the capacitor is connected to the power output end and the connection End between. The high-power power supply device capable of reducing the output inductor volume according to any one of claims 1 to 5, wherein the transformer has a first secondary winding and a second secondary winding, and each secondary winding includes one a first contact, a second contact, and a common contact; the secondary circuit includes a first diode, a second diode, a third diode, and a fourth diode. The first output inductor, the second output inductor, a first capacitor and a second capacitor, the first diode and the cathode of the second diode are respectively connected to the first contact of the first secondary winding And the second contact, the cathodes of the third diode and the fourth diode are respectively connected to the first contact and the second contact of the second secondary winding, and the first to fourth diodes The anode is respectively connected to a ground end, the first output inductor is connected between the common contact of the first secondary winding and the power output end, and the second output inductor is connected to the common connection of the second secondary winding Between the point and the power output end, the first capacitor and the second capacitor are respectively connected to the power output end and Ground terminal. A high-power power supply device capable of reducing an output inductor volume according to any one of claims 1 to 5, the transformer having a first secondary winding, a second secondary winding, and a third secondary winding And a fourth secondary winding, the first to fourth secondary windings respectively have a first contact and a second contact; the secondary circuit includes a first diode, a second a pole body, a third diode, a fourth diode, the first output inductor, the second output inductor and a capacitor, the cathode of the first diode is connected to the first secondary winding a contact, a cathode of the second diode is connected to a first contact of the third secondary winding, and a cathode of the third diode is connected to a second contact of the second secondary winding, the first The cathode of the quadrupole is connected to the second junction of the fourth secondary winding, and the anodes of the first to fourth diodes are respectively connected to a ground, and the first output inductor is connected to the second and fourth Between the first contact of the secondary winding and the output of the power supply, the second output inductor is coupled to the first and third secondary sides The second group of contacts between the power supply and the output terminal, the power supply capacitor is connected between the output terminal and the ground terminal.