CN113067478A - Power supply device and power module driving system - Google Patents
Power supply device and power module driving system Download PDFInfo
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- CN113067478A CN113067478A CN202010002885.4A CN202010002885A CN113067478A CN 113067478 A CN113067478 A CN 113067478A CN 202010002885 A CN202010002885 A CN 202010002885A CN 113067478 A CN113067478 A CN 113067478A
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- 238000006243 chemical reaction Methods 0.000 claims abstract description 53
- 239000003990 capacitor Substances 0.000 claims description 12
- 238000002955 isolation Methods 0.000 abstract description 7
- 238000004804 winding Methods 0.000 description 16
- 238000010586 diagram Methods 0.000 description 9
- 238000000034 method Methods 0.000 description 7
- 238000009413 insulation Methods 0.000 description 4
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
- H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
- H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
- H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/33569—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/08—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/12—Arrangements for reducing harmonics from ac input or output
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
- H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
Abstract
A power supply device, comprising: the first voltage conversion circuit is used for carrying out voltage conversion on the received input voltage to respectively obtain a first group of alternating voltage signals and a second group of alternating voltage signals; the rectifier circuit comprises a first rectifier module and a second rectifier module, and the first rectifier module and the second rectifier module are respectively used for rectifying a first group of alternating voltage signals and a second group of alternating voltage signals to correspondingly obtain a first direct voltage signal and a second direct voltage signal; and the second voltage conversion circuit is connected with the rectifying circuit and is used for respectively converting the first direct-current voltage signal and the second direct-current voltage signal so as to obtain the required direct-current positive voltage and direct-current negative voltage. Compared with the existing primary side control scheme and the secondary side control scheme, the primary side control scheme and the secondary side control scheme are simple and easy to implement, and the high-voltage isolation requirements of the primary side and the secondary side can be effectively met.
Description
Technical Field
The invention relates to the technical field of power electronics, in particular to a power supply device and a power module driving system.
Background
For the existing IGBT driver system as shown in fig. 1, the driver board requires the power board to supply plus and minus 15V. However, since a high voltage is present on the IGBT side, the primary side and the secondary side of the power supply board require an isolation withstand voltage of 10KV or more.
The traditional primary side control scheme mainly comprises a secondary variable control method and a direct open-loop control method, and the methods cannot meet the requirements. For example, the secondary-side control scheme adds complexity to the overall power scheme by requiring additional auxiliary source power. And direct open-loop control reduces the stability and interference immunity of the system.
Disclosure of Invention
In order to solve the above problem, the present invention provides a power supply device including:
the first voltage conversion circuit is used for carrying out voltage conversion on the received input voltage to respectively obtain a first group of alternating voltage signals and a second group of alternating voltage signals;
the rectifying circuit comprises a first rectifying module and a second rectifying module, and the first rectifying module and the second rectifying module are respectively used for rectifying the first group of alternating voltage signals and the second group of alternating voltage signals to correspondingly obtain first direct voltage signals and second direct voltage signals;
and the second voltage conversion circuit is connected with the rectifying circuit and is used for respectively converting the first direct-current voltage signal and the second direct-current voltage signal so as to obtain the required direct-current positive voltage and direct-current negative voltage.
According to an embodiment of the present invention, the first voltage conversion circuit includes:
the transformer comprises a first primary coil, a second primary coil, a first secondary coil and a second secondary coil, wherein the same-name ends of the first primary coil and the first secondary coil are positioned on the same side, the same-name ends of the first primary coil and the second secondary coil are positioned on different sides, the same-name ends of the first primary coil and the second primary coil are positioned on the same side, and the first primary coil and the second primary coil are cascaded;
a first controllable switch, a first power port of which is connected with one end of the first primary coil far away from the second primary coil, and a second power port of which is connected with the ground;
and a first power port of the second controllable switch is connected with one end of the second primary coil far away from the first primary coil, and a second power port of the second controllable switch is connected with the ground.
According to an embodiment of the invention, the first controllable switch is alternately conductive with the second controllable switch.
According to one embodiment of the invention, the first and/or second rectifying module is a diode rectifying circuit.
According to one embodiment of the invention, the second voltage conversion circuit comprises a first back end voltage conversion module and a second back end voltage conversion module which have the same structure and are cascaded in output ends.
According to one embodiment of the present invention, the first back end voltage conversion module includes:
a first end of the first inductor is used for being connected with the positive electrode of the direct current end of the first rectifying module;
a first capacitor and a first diode, the first capacitor being connected between the second end of the first inductor and the anode of the first diode;
a first power port of the third controllable switch is connected with a second end of the first inductor, and a second power port of the third controllable switch is connected with a negative electrode of a direct current end of the first rectifying module;
and the second inductor is connected between the anode of the first diode and the cathode of the direct current end of the first rectifying module.
According to an embodiment of the present invention, the first back-end voltage conversion module further includes:
and the second capacitor is connected between the negative electrode of the first diode and the negative electrode of the direct current end of the first rectifying module.
According to one embodiment of the invention, the first back-end voltage conversion module comprises a Sepic topology circuit, a Zeta topology circuit or a Buck topology circuit.
According to an embodiment of the present invention, the second voltage conversion circuit further includes:
and the closed-loop control unit is connected with the output end anode and the output end cathode of the second voltage conversion circuit and is used for realizing closed-loop control on the second voltage conversion circuit according to the detected output end anode voltage and output end cathode voltage.
The invention also provides a power module driving system which is characterized by comprising the power supply device.
Compared with the existing primary side control scheme and the secondary side control scheme, the power supply device provided by the invention has the advantages that the adopted solution is simple and feasible, and the high-voltage isolation requirements (such as 10KV isolation withstand voltage) of the primary side and the secondary side can be effectively met.
Meanwhile, the power supply device can realize closed-loop control through the second voltage conversion circuit, so that the reliability, the dynamic response capability and the anti-interference performance of the whole system are ensured.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required in the description of the embodiments or the prior art:
fig. 1 is a schematic structural diagram of an IGBT driving device system;
FIG. 2 is a schematic diagram of a prior art primary side control scheme;
FIG. 3 is a schematic diagram of a prior art secondary edge control scheme;
FIG. 4 is a schematic diagram of a power supply apparatus according to one embodiment of the present invention;
fig. 5 is a schematic circuit diagram of a power supply apparatus according to an embodiment of the present invention.
Detailed Description
The following detailed description of the embodiments of the present invention will be provided with reference to the drawings and examples, so that how to apply the technical means to solve the technical problems and achieve the technical effects can be fully understood and implemented. It should be noted that, as long as there is no conflict, the embodiments and the features of the embodiments of the present invention may be combined with each other, and the technical solutions formed are within the scope of the present invention.
In the following description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of the embodiments of the invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced without some of these specific details or with other methods described herein.
In the converter, an IGBT driving circuit needs a positive 15V power supply and a negative 15V power supply for supplying power. The IGBT drive belongs to the high-voltage side, so the primary and secondary sides of the power supply need over 10KV of insulation withstand voltage. Fig. 2 shows a schematic diagram of a prior art primary side control scheme. The existing primary side control method adopts an optocoupler to realize the electrical isolation of a primary side and a secondary side (secondary side), however, the insulation withstand voltage grade of the existing optocoupler can not reach 10KV at present, so the traditional primary side control type power supply scheme is not suitable for an IGBT drive circuit any more.
Fig. 3 is a schematic diagram of a conventional secondary side control scheme. Although the secondary variable control method can avoid the insulation and voltage resistance problem of the optical coupler, the main control chip is placed on the secondary side of the power supply, so that an independent auxiliary source is required to be equipped for supplying power to the main control chip, and the whole solution is complicated.
Aiming at the problems in the prior art, the invention provides a novel power supply device and a power module driving system applying the same, wherein the power supply device can effectively solve the power supply problem of the existing IGBT driving device, not only can meet the insulation and voltage resistance requirements of the primary side and the secondary side, but also can solve the problem of system stability deterioration caused by direct open-loop control.
Fig. 4 shows a schematic structural diagram of the power supply device provided in this embodiment, and fig. 5 shows a schematic specific circuit diagram of the power supply device provided in this embodiment. In order to more clearly show the structure, operation principle and advantages of the power supply device provided by the present embodiment, the power supply device is further described below with reference to fig. 4 and 5.
As shown in fig. 4, the power supply device provided in the present embodiment preferably includes: a first voltage conversion circuit 401, a rectifier circuit 402, and a second voltage conversion circuit 403. The first voltage conversion circuit 401 is configured to receive an input voltage Uin, and perform voltage conversion on the received input voltage Uin, so as to obtain a first group of ac voltage signals and a second group of ac voltage signals, respectively.
Specifically, as shown in fig. 5, in the present embodiment, the first voltage conversion circuit 401 preferably includes: a transformer T1, a first controllable switch Q1, and a second controllable switch Q2. The transformer T1 includes a first primary winding NP1, a second primary winding NP2, a first secondary winding NS1, and a second secondary winding NS 2. The same-name ends of the first primary coil NP1 and the first secondary coil NS1 are located on the same side, the same-name ends of the first primary coil NS1 and the second secondary coil NS2 are located on the different side, and the same-name ends of the first primary coil NP1 and the second primary coil NP2 are located on the same side and are in cascade connection.
The first power port of the first controllable switch Q1 is connected to the end of the first primary winding NP1 remote from the second primary winding NP2, and the second power port thereof is connected to ground. The first power port of the second controllable switch Q1 is connected to the end of the second primary winding NP2 away from the first primary winding NP1, and the second power port is also connected to ground. The common connection port of the first primary coil NP1 and the second primary coil NP2 is connected to an input power source.
For example, in this embodiment, the first controllable switch Q1 and the second controllable switch Q2 may be implemented by N-channel fets in reverse parallel with freewheeling diodes. The drain of the N-channel fet is connected to the first primary winding NP1 as the first power port of the first controllable switch Q1, and the source thereof is connected to ground as the second power port of the first controllable switch Q1. The drain of the further N-channel fet serves as the first power port of the second controllable switch Q2 and is connected to the second primary winding NP2, while the source thereof serves as the second power port of the second controllable switch Q2 and is connected to ground.
In this embodiment, during operation, the first controllable switch Q1 and the second controllable switch Q2 are preferably turned on alternately, so that the first secondary winding NS1 and the second secondary winding NS 3526 of the transformer T1 output the first ac voltage signal and the second ac voltage signal, respectively.
For example, when the first controllable switch Q1 is turned on and the second controllable switch Q2 is turned off, the voltage of the first port a of the first secondary winding NS1 of the transformer T1 will be lower than the voltage of the second port B thereof, while the voltage of the first port C of the second secondary winding NS2 will be higher than the voltage of the second port D thereof. When the first controllable switch Q1 is turned off and the second controllable switch Q2 is turned on, the voltage at the first port a of the first secondary winding NS1 of the transformer T1 will be higher than the voltage at the second port B thereof, and the voltage at the first port C of the second secondary winding NS2 will be higher than the voltage at the first port D thereof.
Of course, in other embodiments of the present invention, the first controllable switches Q1 and/or Q2 may be implemented by other reasonable devices according to practical needs, and the present invention is not limited thereto. For example, in an embodiment of the present invention, the first controllable switch Q1 and the second controllable switch Q2 may be implemented by using IGBTs or the like.
Meanwhile, it should be noted that, in other embodiments of the present invention, the first voltage converting circuit 401 may also be implemented in other reasonable circuit forms according to actual needs, and the present invention also does not specifically limit this.
In this embodiment, the rectifying circuit 402 preferably includes a first rectifying module 402a and a second rectifying module 402b having the same structure.
The first rectifying module 402a and the second rectifying module 402b are respectively configured to rectify a first group of ac voltage signals and a second group of ac voltage signals transmitted by the first voltage converting circuit 402a, and correspondingly obtain a first dc voltage signal and a second dc voltage signal.
Specifically, in this embodiment, the first rectifying module 402a and/or the second rectifying module 402b are preferably implemented by a diode full-bridge rectifying circuit. As shown in fig. 5, the first rectification module 402a is preferably implemented using an H-bridge rectification circuit formed by 4 diodes (i.e., diode D1, diode D2, diode D3, and diode D4), and the second rectification module 402b is preferably also implemented using an H-bridge rectification circuit formed by 4 diodes (i.e., diode D5, diode D6, diode D7, and diode D8).
Through the full-bridge rectification circuit, in this embodiment, no matter what on-off state the corresponding controllable switch in the first voltage conversion circuit 401 is, the transformer T1 can transmit the energy to the final output end on the primary side, so that the efficiency is maximized.
For example, when the first controllable switch Q1 is turned on and the second controllable switch Q2 is turned off, the diode D2 and the diode D3 of the first rectifying module 402a and the diode D6 and the diode D7 of the second rectifying module 402b are turned on, so as to generate the first direct-current voltage signal. When the first controllable switch Q1 is turned off and the second controllable switch Q2 is turned on, the diode D1 and the diode D4 of the first rectifying module 402a and the diode D5 and the diode D8 of the second rectifying module 402b are turned on, so as to generate a second dc voltage signal.
It should be noted that, in other embodiments of the present invention, the first rectifying module 402a and/or the second rectifying module 402b may also be implemented in other reasonable circuit forms according to actual needs, and the present invention is not limited thereto. For example, in an embodiment of the present invention, the first rectifying module 402a and/or the second rectifying module 402b may also be implemented by using a fully controlled H-bridge rectifying circuit.
As shown in fig. 4 again, in the present embodiment, the second voltage converting circuit 403 is connected to the rectifying circuit 402, and is capable of converting the first dc voltage signal and the second dc voltage signal transmitted by the rectifying circuit 402 to obtain the required dc positive voltage Uout + and dc negative voltage Uout-.
Specifically, in this embodiment, the second voltage conversion circuit 403 includes a first back-end voltage conversion module 403a and a second back-end voltage conversion module 403b, which have the same structure and have cascaded output ends. Since the first back-end voltage converting module 403a and the second back-end voltage converting module 403b have the same structure, for avoiding redundant description, only the first back-end voltage converting module 403a is taken as an example for description.
As shown in fig. 5, in this embodiment, the first back-end voltage conversion module 403a preferably includes: a first inductor L1, a first capacitor C1, a first diode D9, a third controllable switch Q3, and a second inductor L2. The first terminal of the first inductor L1 is used for being connected to the positive terminal of the dc terminal of the first rectifier module 403a, and the first capacitor C1 is connected between the second terminal of the first inductor L1 and the positive terminal of the first diode D9. A first power port of the third controllable switch Q3 is connected to the second end of the first inductor L1, and a second power port thereof is connected to the negative terminal of the dc terminal of the first rectifying module 403 a. The second inductor L2 is connected between the positive terminal of the first diode D9 and the negative terminal of the dc terminal of the first rectifying module 403 a.
In this embodiment, the third controllable switch Q3 may also be implemented by an N-channel fet. Specifically, the drain of the N-channel fet serves as the first power port of the third controllable switch Q3 and is connected to the second terminal of the first inductor L1, and the source thereof serves as the second power port of the third controllable switch Q3 and is connected to the negative terminal of the dc terminal of the first rectifier module 403 a.
Optionally, in this embodiment, the first back-end voltage conversion module may further include a second capacitor C2. The second capacitor C2 is connected between the negative terminal of the first diode D9 and the negative terminal of the dc terminal of the first rectifying module 403a, so as to filter the dc output voltage.
Similarly, for the second back-end voltage conversion module 403b, it preferably includes: a third inductor L3, a third capacitor C3, a second diode D10, a fourth controllable switch Q4, a fourth inductor L4, and a fourth capacitor C4. Since the circuit structure of the second back-end voltage converting module 403b is preferably the same as that of the first back-end voltage converting module 403a, detailed description of the second back-end voltage converting module 403b is omitted here.
It should be noted that, in this embodiment, optionally, the first back-end voltage conversion module 403a and the second back-end voltage conversion module 403b may also preferably include a third diode D11 and a fourth diode D12. The anode of the third diode D11 is connected to the cathode of the dc terminal of the first rectifying module 403a, and the cathode of the third diode D11 is connected to the anode of the dc terminal of the first rectifying module 403 a. The anode of the fourth diode D12 is connected to the cathode of the dc terminal of the second rectifying module 403b, and the cathode of the fourth diode D12 is connected to the anode of the dc terminal of the second rectifying module 403 b.
In this embodiment, the negative terminal of the output terminal of the first rear-end voltage converting module 403a is connected to the positive terminal of the output terminal of the second rear-end voltage converting circuit 403b and grounded. For example, if the output voltages of the first and second back-end voltage conversion modules 403a and 403b are both 15V, the output terminals are connected in series and grounded, and finally the positive voltage Uout + of the output terminal of the second voltage conversion module can be +15V, and the negative voltage Uout-of the output terminal thereof can be-15V.
Of course, in other embodiments of the present invention, the first rear voltage conversion module and/or the second rear voltage conversion module may also be implemented by using other reasonable circuits, and the present invention is not limited thereto. For example, in different embodiments of the present invention, the first back-end voltage conversion module and/or the second back-end voltage conversion module may also be implemented by using a Sepic topology circuit, a Zeta topology circuit, or a Buck topology circuit.
In this embodiment, the second voltage converting circuit 403 further includes a closed-loop control unit. The closed-loop control unit is connected to the output terminal positive electrode and the output terminal negative electrode of the second voltage conversion circuit 403, and is configured to implement closed-loop control on the second voltage conversion circuit 403 according to the detected output terminal positive electrode voltage and the detected output terminal negative electrode voltage.
In this embodiment, when the output voltage of the second voltage converting circuit 403 is higher than the preset voltage, the closed-loop control unit correspondingly controls the switching tube in the second voltage converting circuit 403 to reduce the duty ratio, so as to reduce the output voltage; when the output voltage of the second voltage converting circuit 403 is lower than the preset voltage, the closed-loop control unit correspondingly controls the switching tube in the second voltage converting circuit 403 to increase the duty ratio, thereby increasing the output voltage. At the same time, the second voltage converting circuit 403 can maintain its output dc voltage within a certain voltage schedule (e.g., within a desired fluctuation range) by closed-loop control.
As can be seen from the above description, compared with the existing primary side control scheme and the secondary side control scheme, the solution adopted by the power supply device provided by the present invention is simple and easy to implement, and can effectively meet the high voltage isolation requirement (e.g. 10KV isolation withstand voltage) of the primary side and the secondary side.
Meanwhile, the power supply device can realize closed-loop control through the second voltage conversion circuit, so that the reliability, the dynamic response capability and the anti-interference performance of the whole system are ensured.
It is to be understood that the disclosed embodiments of the invention are not limited to the particular structures or process steps disclosed herein, but extend to equivalents thereof as would be understood by those skilled in the relevant art. It is also to be understood that the terminology used herein is for the purpose of describing particular embodiments only, and is not intended to be limiting.
Reference in the specification to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the invention. Thus, the appearances of the phrase "one embodiment" or "an embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment.
While the above examples are illustrative of the principles of the present invention in one or more applications, it will be apparent to those of ordinary skill in the art that various changes in form, usage and details of implementation can be made without departing from the principles and concepts of the invention. Accordingly, the invention is defined by the appended claims.
Claims (10)
1. A power supply device, characterized in that the power supply device comprises:
the first voltage conversion circuit is used for carrying out voltage conversion on the received input voltage to respectively obtain a first group of alternating voltage signals and a second group of alternating voltage signals;
the rectifying circuit comprises a first rectifying module and a second rectifying module, and the first rectifying module and the second rectifying module are respectively used for rectifying the first group of alternating voltage signals and the second group of alternating voltage signals to correspondingly obtain first direct voltage signals and second direct voltage signals;
and the second voltage conversion circuit is connected with the rectifying circuit and is used for respectively converting the first direct-current voltage signal and the second direct-current voltage signal so as to obtain the required direct-current positive voltage and direct-current negative voltage.
2. The power supply device according to claim 1, wherein the first voltage conversion circuit includes:
the transformer comprises a first primary coil, a second primary coil, a first secondary coil and a second secondary coil, wherein the same-name ends of the first primary coil and the first secondary coil are positioned on the same side, the same-name ends of the first primary coil and the second secondary coil are positioned on different sides, the same-name ends of the first primary coil and the second primary coil are positioned on the same side, and the first primary coil and the second primary coil are cascaded;
a first controllable switch, a first power port of which is connected with one end of the first primary coil far away from the second primary coil, and a second power port of which is connected with the ground;
and a first power port of the second controllable switch is connected with one end of the second primary coil far away from the first primary coil, and a second power port of the second controllable switch is connected with the ground.
3. The power supply of claim 2 wherein the first controllable switch is alternately conductive with the second controllable switch.
4. The power supply device according to any one of claims 1 to 3, wherein the first rectifying module and/or the second rectifying module is a diode rectifying circuit.
5. The power supply device according to any one of claims 1 to 4, wherein the second voltage conversion circuit comprises a first back end voltage conversion module and a second back end voltage conversion module which have the same structure and are cascaded in output end.
6. The power supply device of claim 5, wherein the first back-end voltage conversion module comprises:
a first end of the first inductor is used for being connected with the positive electrode of the direct current end of the first rectifying module;
a first capacitor and a first diode, the first capacitor being connected between the second end of the first inductor and the anode of the first diode;
a first power port of the third controllable switch is connected with a second end of the first inductor, and a second power port of the third controllable switch is connected with a negative electrode of a direct current end of the first rectifying module;
and the second inductor is connected between the anode of the first diode and the cathode of the direct current end of the first rectifying module.
7. The power supply device of claim 6, wherein the first back-end voltage conversion module further comprises:
and the second capacitor is connected between the negative electrode of the first diode and the negative electrode of the direct current end of the first rectifying module.
8. The power supply apparatus according to claim 5, wherein the first back-end voltage conversion module includes a Sepic topology circuit, a Zeta topology circuit, or a Buck topology circuit.
9. The power supply device according to any one of claims 1 to 8, wherein the second voltage conversion circuit further comprises:
and the closed-loop control unit is connected with the output end anode and the output end cathode of the second voltage conversion circuit and is used for realizing closed-loop control on the second voltage conversion circuit according to the detected output end anode voltage and output end cathode voltage.
10. A power module drive system, characterized in that the system comprises a power supply device according to any one of claims 1-9.
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| CN202010002885.4A CN113067478A (en) | 2020-01-02 | 2020-01-02 | Power supply device and power module driving system |
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| CN202010002885.4A CN113067478A (en) | 2020-01-02 | 2020-01-02 | Power supply device and power module driving system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI790956B (en) * | 2022-03-31 | 2023-01-21 | 宏碁股份有限公司 | Power supply device for suppressing noise |
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| US20150326104A1 (en) * | 2014-05-07 | 2015-11-12 | Huawei Technologies Co., Ltd. | Power Supply Bus Circuit |
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| TWI790956B (en) * | 2022-03-31 | 2023-01-21 | 宏碁股份有限公司 | Power supply device for suppressing noise |
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Application publication date: 20210702 |