CN105680700A - High-efficiency isolated-type multipath wide voltage output switching power supply circuit topological structure - Google Patents
High-efficiency isolated-type multipath wide voltage output switching power supply circuit topological structure Download PDFInfo
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- CN105680700A CN105680700A CN201610211157.8A CN201610211157A CN105680700A CN 105680700 A CN105680700 A CN 105680700A CN 201610211157 A CN201610211157 A CN 201610211157A CN 105680700 A CN105680700 A CN 105680700A
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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
- H02M3/337—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 in push-pull configuration
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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
- H02M3/33561—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 more than one ouput with independent control
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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
- H02M3/33576—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 having at least one active switching element at the secondary side of an isolation transformer
- H02M3/33592—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 having at least one active switching element at the secondary side of an isolation transformer having a synchronous rectifier circuit or a synchronous freewheeling circuit at the secondary side of an isolation transformer
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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
- H02M1/0067—Converter structures employing plural converter units, other than for parallel operation of the units on a single load
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Dc-Dc Converters (AREA)
- Rectifiers (AREA)
Abstract
The invention relates to a high-efficiency isolated-type multipath wide voltage output switching power supply circuit topological structure, which comprises a push-pull circuit, a rectifier and filter circuit, a synchronous rectification BUCK circuit and a flyback circuit. The input end of the push-pull circuit is connected with a power supply, and the output end thereof is connected with the input end of the rectifier and filter circuit; the output end of the rectifier and filter circuit is connected with the synchronous rectification BUCK circuit and the flyback circuit; the output end of the synchronous rectification BUCK circuit is a low-voltage output end of the power supply; and the output end of the flyback circuit is a high-voltage output end of the power supply; The switch power supply circuit topological structure adopts the cascading structure of the fixed maximum duty cycle ZVS soft switching push-pull circuit topology and the synchronous rectification BUCK circuit and the flyback circuit, and provides high-efficiency low-voltage high-current output and high-voltage output, so that the overall circuit structure is simplified, the overall efficiency of the circuit is improved, and the size is reduced.
Description
Technical field
The present invention relates to switch power technology field, is specifically related to the circuit topological structure of a kind of efficient isolated multipath Width funtion output switch power source.
Background technology
The circuit topological structure of Switching Power Supply is varied, what application was wide at present is include Unisolated switch electric source topology Buck circuit, Boost circuit, Buck-Boost circuit etc., isolating switch power topology forward converter, circuit of reversed excitation, half-bridge circuit, full-bridge circuit, push-pull circuit etc. Unisolated switch electric source topology efficiency has efficiency and is better than the advantage of isolating switch power topology, but it is because the feature of non-isolated, limited in needs isolated form occasion of powering. Additionally, in switching power circuit topology, export occasion at low-voltage and high-current and often use synchronous rectification, to improve switch power efficiency. When designing isolated multipath Width funtion output switch power source, general frequently with multichannel isolating switch power topology, or adopting synchronous rectification to be combined use with forward converter, circuit of reversed excitation, half-bridge circuit, full-bridge circuit, push-pull circuit to improve efficiency, various combination is applicable to different application scenarios. But there is circuit complexity, volume is relatively big, the shortcomings such as delivery efficiency is relatively low.
Summary of the invention
It is an object of the invention to provide the circuit topological structure of a kind of efficient isolated multipath Width funtion output switch power source, simplify integrated circuit structure, the whole efficiency of circuit is improved, and volume obtains reduction.
For achieving the above object, present invention employs techniques below scheme:
A kind of circuit topological structure of efficient isolated multipath Width funtion output switch power source, including push-pull circuit, current rectifying and wave filtering circuit, synchronous rectification BUCK circuit and circuit of reversed excitation, the input of described push-pull circuit is connected with power supply, its outfan is connected with the input of current rectifying and wave filtering circuit, the output of current rectifying and wave filtering circuit is connected with synchronous rectification BUCK circuit, circuit of reversed excitation respectively, the outfan of described synchronous rectification BUCK circuit is power supply low-voltage output, and the outfan of described circuit of reversed excitation is power supply high-voltage output end.
Described push-pull circuit includes transformator T1, VMOS pipe V1 and VMOS pipe V2, the armature winding two ends of described transformator T1 are connected with the drain electrode of VMOS pipe V1 and VMOS pipe V2 respectively, the armature winding centre cap becoming transformator T1 is connected with power supply, the source grounding of the source electrode of VMOS pipe V1 and VMOS pipe V2, the control end that grid is late-class circuit of VMOS pipe V1 and VMOS pipe V2, becomes the outfan that the two ends of the secondary coil of transformator T1 are push-pull circuit.
Described current rectifying and wave filtering circuit includes inductance L1, diode D1, diode D2, electric capacity C1 and electric capacity C2, the input that anode is current rectifying and wave filtering circuit of described diode D1 and diode D2, the negative electrode of described diode D1 and diode D2 is all connected with one end of inductance L1, the other end of inductance L1 is connected through the secondary center tap of electric capacity C2 with transformator T1, the secondary center tap ground connection of transformator T1, one end of described electric capacity C1 is connected with the negative electrode of diode D1, the outfan that node side is current rectifying and wave filtering circuit between the other end and inductance L1 and the electric capacity C2 of electric capacity C1.
Described synchronous rectification BUCK circuit includes inductance L2, VMOS pipe V3, VMOS pipe V4 and electric capacity C3, the source electrode of described VMOS pipe V3 is connected with the outfan of current rectifying and wave filtering circuit, its drain electrode is successively through inductance L2, electric capacity C3 ground connection, the drain electrode of described VMOS pipe V4 is connected with the drain electrode of VMOS pipe V3, the source ground of VMOS pipe V4, the control end that grid is late-class circuit of VMOS pipe V3 and VMOS pipe V4, the node between inductance L2 and electric capacity C3 is the low-voltage output of power supply.
Described circuit of reversed excitation includes transformator T2, diode D3, VMOS pipe V5 and electric capacity C4, the primary coil Same Name of Ends of described transformator T2 and the source electrode of VMOS pipe V5 are connected with the outfan of current rectifying and wave filtering circuit, the different name end of the primary coil of transformator T2 is connected with the drain electrode of VMOS pipe V5, the secondary coil different name end of transformator T2 is connected with the anode of diode D3, the negative electrode of diode D3 is power supply high-voltage output end, the Same Name of Ends ground connection of the secondary coil of transformator T2, one end of described electric capacity C4 is connected with the negative electrode of diode D3, its other end is connected with the secondary coil Same Name of Ends of transformator T2.
As shown from the above technical solution, the present invention, by adopting the high efficiency synchronous rectification Buck circuit having high efficiency fixing maximum duty cycle ZVS Sofe Switch push-pull circuit and exporting with applicable low-voltage, high-current, having the technology that the circuit of reversed excitation of High voltage output combines, designs the circuit topological structure of the isolated multipath Width funtion output switch power source of applicable multiple-channel output application scenario. This topological structure make use of the feature of the isolation of push-pull topology, it is achieved the isolation to input voltage, by pre-for input voltage voltage stabilizing to more low-voltage. Push-pull circuit adopts fixing maximum duty cycle to control to realize peak efficiency, is controlled realizing ZVS Sofe Switch push-pull circuit switch time to rectification circuit outputting inductance, push-pull circuit VMOS. This push-pull circuit and the synchronous rectification Buck circuit of rear class are implemented in combination with the efficient output of low pressure, are particularly suited for low-voltage, high-current occasion. Additionally, this push-pull circuit combines with the circuit of reversed excitation of rear class, it is achieved High voltage output so that the design of high-voltage output circuit simplifies, and the whole efficiency of circuit is improved, and volume obtains reduction.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of the present invention.
Detailed description of the invention
Below in conjunction with accompanying drawing, the present invention will be further described:
As shown in Figure 1, the circuit topological structure of the efficient isolated multipath Width funtion output switch power source of the present embodiment, including push-pull circuit 1, current rectifying and wave filtering circuit 2, synchronous rectification BUCK circuit 3 and circuit of reversed excitation 4, the input of push-pull circuit 1 is connected with power supply, its outfan is connected with the input of current rectifying and wave filtering circuit 2, the output of current rectifying and wave filtering circuit 2 is connected with synchronous rectification BUCK circuit 3, circuit of reversed excitation 4 respectively, the outfan of synchronous rectification BUCK circuit 3 is power supply low-voltage output, and the outfan of circuit of reversed excitation 4 is power supply high-voltage output end.
This push-pull circuit 1 includes transformator T1, VMOS pipe V1 and VMOS pipe V2, the armature winding two ends of transformator T1 are connected with the drain electrode of VMOS pipe V1 and VMOS pipe V2 respectively, the armature winding centre cap of transformator T1 is connected with power supply, the source grounding of the source electrode of VMOS pipe V1 and VMOS pipe V2, the grid of VMOS pipe V1 and VMOS pipe V2 is connected with the control circuit of Switching Power Supply, and the two ends of the secondary coil of transformator T1 are the outfan of push-pull circuit 1. This push-pull circuit 1 is for by the input voltage pre-voltage stabilizing of isolation of input circuit to more low-voltage, adopt fixing maximum duty cycle to control to realize peak efficiency, be controlled realizing ZVS Sofe Switch push-pull circuit switch time to rectification circuit outputting inductance, push-pull circuit VMOS.
Current rectifying and wave filtering circuit 2 includes inductance L1, diode D1, diode D2, electric capacity C1 and electric capacity C2, the anode of diode D1 and diode D2 is connected with the secondary windings two ends of transformator T1 respectively, the negative electrode of diode D1 and diode D2 is all connected with one end of inductance L1, the other end of inductance L1 is connected through the secondary center tap of electric capacity C2 with transformator T1, the secondary center tap ground connection of transformator T1, one end of electric capacity C1 is connected with the negative electrode of diode D1, the outfan that node side is current rectifying and wave filtering circuit 2 between the other end and inductance L1 and the electric capacity C2 of electric capacity C1.
Synchronous rectification BUCK circuit 3 includes inductance L2, VMOS pipe V3, VMOS pipe V4 and electric capacity C3, the source electrode of VMOS pipe V3 is connected with inductance L1, its drain electrode is successively through inductance L2, electric capacity C3 ground connection, the drain electrode of VMOS pipe V4 is connected with the drain electrode of VMOS pipe V3, the source ground of VMOS pipe V4, the grid of VMOS pipe V3 and VMOS pipe V4 is that the control circuit with Switching Power Supply is connected, and the node between inductance L2 and electric capacity C3 is the low-voltage output of power supply. This synchronous rectification Buck circuit 3 is for converting the output voltage of push-pull circuit 1 to need in circuit low-voltage, it is achieved high efficiency low-voltage, high-current output function, simplifies the design of isolated form low voltage output switch power source simultaneously, improves efficiency. Additionally, push-pull circuit 1 is by pre-for input voltage voltage stabilizing to more low-voltage, reduce the input voltage of synchronous rectification Buck circuit 3, output voltage pressure reduction, improve the work efficiency of low-voltage, high-current output.
Circuit of reversed excitation 4 includes transformator T2, diode D3, VMOS pipe V5 and electric capacity C4, the primary coil Same Name of Ends of transformator T2 is connected with the source electrode of VMOS pipe V3, the different name end of the primary coil of transformator T2 is connected with the drain electrode of VMOS pipe V5, the source electrode of VMOS pipe V5 is connected with electric capacity C1, the grid of VMOS pipe V5 is connected with the control circuit of Switching Power Supply, the secondary coil different name end of transformator T2 is connected with the anode of diode D3, the negative electrode of diode D3 is power supply high-voltage output end, the Same Name of Ends ground connection of the secondary coil of transformator T2, one end of electric capacity C4 is connected with the negative electrode of diode D3, its other end is connected with the secondary coil Same Name of Ends of transformator T2. this push-pull circuit 4 for converting the high voltage needed in circuit to by output voltage so that the design of high-voltage output circuit simplifies, and the whole efficiency of circuit is improved, and volume obtains reduction.
Operation principle: the grid of power VMOS tube V1, V2 of push-pull circuit 1 is controlled by the fixing maximum duty cycle high-frequency pulse signal of staggered complementary type that pulse width modulator produces, this signal controls being switched on or off of VMOS pipe V1, V2, thus by energy time level from T1 primary transmission to T1, direct voltage output is converted the energy into by current rectifying and wave filtering circuit 2, realize the pre-voltage stabilizing of output voltage within the specific limits, provide power supply to late-class circuit.VMOS pipe V3 and the V4 of synchronous rectification Buck circuit 3 is controlled by pulse width modulator respectively, pulse width modulator produces staggered complementary type high-frequency pulse signal, this signal controls being switched on or off of VMOS pipe V3, V4, realize by L2, C3, energy is transferred to power supply output Vo1, this DC voltage is after feedback signal conditioning processing of circuit, the dutycycle of high-frequency pulse signal is regulated, it is achieved the accurate voltage stabilizing of low-voltage, high-current output voltage by pulse width modulator. The VMOS pipe V5 of circuit of reversed excitation 4 is controlled by pulse width modulator, pulse width modulator produces high-frequency pulse signal, this signal controls being switched on or off of VMOS pipe V5, realize just energy and be transferred to power supply output Vo2 by T2, this DC voltage is after feedback signal conditioning processing of circuit, the dutycycle of high-frequency pulse signal is regulated, it is achieved the accurate voltage stabilizing of High voltage output voltage by pulse width modulator.
Based on this circuit topology, second level low-voltage, high-current output can adopt Multi-path synchronous rectification Buck circuit in parallel, with the demand of satisfied different low-voltage, high-current outputs, second level High voltage output can adopt multichannel circuit of reversed excitation in parallel, with the demand of satisfied different High voltage outputs.
Embodiment described above is only that the preferred embodiment of the present invention is described; not the scope of the present invention is defined; under the premise designing spirit without departing from the present invention; various deformation that technical scheme is made by those of ordinary skill in the art and improvement, all should fall in the protection domain that claims of the present invention is determined.
Claims (5)
1. the circuit topological structure of an efficient isolated multipath Width funtion output switch power source, it is characterized in that: include push-pull circuit (1), current rectifying and wave filtering circuit (2), synchronous rectification BUCK circuit (3) and circuit of reversed excitation (4), the input of described push-pull circuit (1) is connected with power supply, its outfan is connected with the input of current rectifying and wave filtering circuit (2), the output of current rectifying and wave filtering circuit (2) respectively with synchronous rectification BUCK circuit (3), circuit of reversed excitation (4) is connected, the outfan of described synchronous rectification BUCK circuit (3) is power supply low-voltage output, the outfan of described circuit of reversed excitation (4) is power supply high-voltage output end.
2. the circuit topological structure of efficient isolated multipath Width funtion output switch power source according to claim 1, it is characterized in that: described push-pull circuit (1) includes transformator T1, VMOS pipe V1 and VMOS pipe V2, the armature winding two ends of described transformator T1 are connected with the drain electrode of VMOS pipe V1 and VMOS pipe V2 respectively, the armature winding centre cap of transformator T1 is connected with power supply, the source grounding of the source electrode of VMOS pipe V1 and VMOS pipe V2, the control end that grid is late-class circuit of VMOS pipe V1 and VMOS pipe V2, the two ends of the secondary coil of transformator T1 are the outfan of push-pull circuit (1).
3. the circuit topological structure of efficient isolated multipath Width funtion output switch power source according to claim 1, it is characterized in that: described current rectifying and wave filtering circuit (2) includes inductance L1, diode D1, diode D2, electric capacity C1 and electric capacity C2, the input that anode is current rectifying and wave filtering circuit of described diode D1 and diode D2, the negative electrode of described diode D1 and diode D2 is all connected with one end of inductance L1, the other end of inductance L1 is connected through the secondary center tap of electric capacity C2 with transformator T1, the secondary center tap ground connection of transformator T1, one end of described electric capacity C1 is connected with the negative electrode of diode D1, the outfan that node side is current rectifying and wave filtering circuit (2) between the other end and inductance L1 and the electric capacity C2 of electric capacity C1.
4. the circuit topological structure of efficient isolated multipath Width funtion output switch power source according to claim 1, it is characterized in that: described synchronous rectification BUCK circuit (3) includes inductance L2, VMOS pipe V3, VMOS pipe V4 and electric capacity C3, the source electrode of described VMOS pipe V3 is connected with the outfan of current rectifying and wave filtering circuit (2), its drain electrode is successively through inductance L2, electric capacity C3 ground connection, the drain electrode of described VMOS pipe V4 is connected with the drain electrode of VMOS pipe V3, the source ground of VMOS pipe V4, the control end that grid is late-class circuit of VMOS pipe V3 and VMOS pipe V4, node between inductance L2 and electric capacity C3 is the low-voltage output of power supply.
5. the circuit topological structure of efficient isolated multipath Width funtion output switch power source according to claim 1, it is characterized in that: described circuit of reversed excitation (4) includes transformator T2, diode D3, VMOS pipe V5 and electric capacity C4, the primary coil Same Name of Ends of described transformator T2 and the source electrode of VMOS pipe V5 are connected with the outfan of current rectifying and wave filtering circuit (2), the different name end of the primary coil of transformator T2 is connected with the drain electrode of VMOS pipe V5, the secondary coil different name end of transformator T2 is connected with the anode of diode D3, the negative electrode of diode D3 is power supply high-voltage output end, the Same Name of Ends ground connection of the secondary coil of transformator T2, one end of described electric capacity C4 is connected with the negative electrode of diode D3, its other end is connected with the secondary coil Same Name of Ends of transformator T2.
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| CN112564457A (en) * | 2019-09-10 | 2021-03-26 | 中车株洲电力机车研究所有限公司 | Current transformation system and power supply circuit of IGBT driving device |
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| CN112467997B (en) * | 2019-09-06 | 2021-12-31 | 中国科学院电工研究所 | Flexible substation topology circuit and control method thereof |
| CN112564457A (en) * | 2019-09-10 | 2021-03-26 | 中车株洲电力机车研究所有限公司 | Current transformation system and power supply circuit of IGBT driving device |
| CN112564457B (en) * | 2019-09-10 | 2021-09-21 | 中车株洲电力机车研究所有限公司 | Current transformation system and power supply circuit of IGBT driving device |
| CN110557028A (en) * | 2019-09-26 | 2019-12-10 | 特变电工西安电气科技有限公司 | Secondary auxiliary power supply circuit and working method |
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