CN111835206A - Switching method applied to charging module transformer winding switching device - Google Patents

Switching method applied to charging module transformer winding switching device Download PDF

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Publication number
CN111835206A
CN111835206A CN202010771314.7A CN202010771314A CN111835206A CN 111835206 A CN111835206 A CN 111835206A CN 202010771314 A CN202010771314 A CN 202010771314A CN 111835206 A CN111835206 A CN 111835206A
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CN
China
Prior art keywords
switching
voltage
winding
transformer
switching device
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Withdrawn
Application number
CN202010771314.7A
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Chinese (zh)
Inventor
范建华
徐鹏飞
刘玉林
李庆祥
高文科
张建
李伟
吴雪梅
卢峰
林志超
程艳艳
叶齐
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shenyang Keyuan State Grid Power Engineering Survey And Design Co ltd
Qingdao Topscomm Communication Co Ltd
Original Assignee
Shenyang Keyuan State Grid Power Engineering Survey And Design Co ltd
Qingdao Topscomm Communication Co Ltd
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Application filed by Shenyang Keyuan State Grid Power Engineering Survey And Design Co ltd, Qingdao Topscomm Communication Co Ltd filed Critical Shenyang Keyuan State Grid Power Engineering Survey And Design Co ltd
Publication of CN111835206A publication Critical patent/CN111835206A/en
Withdrawn legal-status Critical Current

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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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
    • B60L53/20—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles characterised by converters located in the vehicle
    • B60L53/22—Constructional details or arrangements of charging converters specially adapted for charging electric vehicles
    • 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
    • H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
    • H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
    • H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P13/00—Arrangements for controlling transformers, reactors or choke coils, for the purpose of obtaining a desired output
    • H02P13/06—Arrangements for controlling transformers, reactors or choke coils, for the purpose of obtaining a desired output by tap-changing; by rearranging interconnections of windings
    • 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
    • H02M1/0003—Details of control, feedback or regulation circuits
    • H02M1/0038—Circuits or arrangements for suppressing, e.g. by masking incorrect turn-on or turn-off signals, e.g. due to current spikes in current mode control
    • 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
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/64—Electric machine technologies in electromobility
    • 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
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/70—Energy storage systems for electromobility, e.g. batteries
    • 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
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
    • 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
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/72—Electric energy management in electromobility
    • 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
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02T90/10—Technologies relating to charging of electric vehicles
    • Y02T90/14—Plug-in electric vehicles

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

Abstract

The invention discloses a switching method applied to a charging module transformer winding switching device. The secondary side of the high-frequency transformer is provided with three taps, wherein two taps are connected with switching tubes which are connected in series in an anti-reverse mode, and the controller controls the high-frequency inverter circuit and the switching tubes through the driving circuit; the controller adjusts the control quantity of the high-frequency inverter circuit according to the winding switching proportion, and simultaneously executes a four-step current conversion method to control the on-off of the switching tube, and the winding is switched from high voltage to low voltage or from low voltage to high voltage. The invention realizes flexible seamless switching between windings, eliminates peak voltage and prolongs the service life of the switching tube; controller rootJudging the current i of the secondary winding according to the control quantity of the high-frequency inverter circuits1、is2The direction of the current is not needed to be judged by a detection circuit, so that the circuit structure is simplified; the converter realizes continuous high-power output in different output stages, and the efficiency of the converter is improved.

Description

Switching method applied to charging module transformer winding switching device
Technical Field
The invention relates to the technical field of power electronics and control, in particular to a switching method applied to a charging module transformer winding switching device.
Background
With the development of the new energy automobile industry, the voltage range of the battery of the electric automobile is gradually expanded, and the high-power direct-current charging equipment must meet the charging requirements of different types of electric automobiles and meet the wide voltage range output of 200V-1000V. The traditional transformer mostly adopts a secondary single-winding topological scheme, the output voltage range is 200V-800V, and the full power output in such a wide range is difficult to meet under a single working mode.
The existing method adopts a topological structure of a secondary double winding of a transformer and is widely applied, but a relay is adopted as a switching device, the response speed of the relay is slow, the winding needs to be switched after shutdown, and seamless switching cannot be realized.
In the existing method, power devices such as MOS and IGBT are used as switching tubes, and switching from high voltage to low voltage or switching from low voltage to high voltage is carried out, and after the switching tube of one coil is turned off, the switching tube of the other coil can be turned on.
Disclosure of Invention
In order to solve the above problems, the present invention provides a switching method applied to a switching device of a charging module transformer winding, and the technical scheme of the present invention is as follows: a switching method applied to a charging module transformer winding switching device comprises a high-frequency transformer, a switching tube, a controller, a driving circuit and a high-frequency inverter circuit, wherein the secondary side of the high-frequency transformer is provided with three taps, two taps are connected with the switching tube which is connected in series in an anti-reverse mode, and the controller controls the high-frequency inverter circuit and the switching tube through the driving circuit; when the output voltage of the transformer winding switching device is higher or lower than the set switching voltage, the controller adjusts the control quantity of the high-frequency inverter circuit according to the winding switching proportion, and simultaneously executes a four-step current conversion method to control the on or off of the switching tube, and the winding is switched from high voltage to low voltage or from low voltage to high voltage, so that the high-power output in a wide voltage range is realized.
Preferably, the winding switching method comprises: when the controller detects that the output voltage of the transformer winding switching device reaches a voltage switching point, the control quantity of the primary side high-frequency inverter circuit is adjusted according to the switching proportion Np: Ns1 or Np: Ns2 of the transformer winding, and the switching tube is controlled to be switched on or off according to the switching of the output voltage of the transformer winding switching device from high voltage to low voltage or from low voltage to high voltage.
Preferably, when the output voltage is switched from high voltage to low voltage, before the switching tube acts, the S1 and the S2 are in a conducting state, the S3 and the S4 are in a closing state, the controller executes a four-step commutation method, the sequence of the action of the switching tube is that the S2 is closed firstly, then the S3 is connected, the S1 is closed again, and finally the S4 is connected, so that four-step seamless commutation is realized; when the output voltage is switched from low voltage to high voltage, before the action of the switching tube, S1 and S2 are in an off state, S3 and S4 are in an on state, the controller executes a four-step commutation method, the action sequence of the switching tube is that S4 is turned off first, then S1 is turned on, S3 is turned off again, and finally S2 is turned on, so that four-step seamless commutation is realized.
Preferably, the voltage switching point is determined according to the optimal output efficiency interval and the highest output voltage of the low-voltage full power.
Preferably, Np is the number of primary turns of the transformer, Ns1 is the number of first winding turns of the transformer, and Ns2 is the number of second winding turns of the transformer. The switching tubes S1, S2, S3 and S4 are MOS tubes or IGBTs.
The invention has the advantages that the invention realizes the flexible seamless switching between the windings, eliminates the peak voltage and prolongs the service life of the switch tube; the controller judges the current i of the secondary winding according to the control quantity of the high-frequency inverter circuits1、is2The direction of the current is not needed to be judged by a detection circuit, so that the circuit structure is simplified; the converter realizes continuous high-power output in different output stages, and the efficiency of the converter is improved.
Drawings
Fig. 1 is a schematic diagram of the circuit topology of the present invention.
Fig. 2 is a diagram of the current path switching when switching from high voltage to low voltage in accordance with the present invention.
Fig. 3 is a diagram of the switching state from high pressure to low pressure of the present invention.
Fig. 4 is an expanded view of the four-step commutation process of fig. 3.
FIG. 5 is a diagram of the current path switching when switching from low voltage to high voltage in accordance with the present invention.
Fig. 6 is a diagram of the switching state from low pressure to high pressure of the present invention.
Fig. 7 is an expanded view of the four-step commutation process of fig. 6.
Detailed Description
In a switching method applied to a charging module transformer winding switching device, a circuit topological schematic diagram of the switching device is shown in fig. 1. When the converter is in the high-voltage output working state, the first winding and the second winding are jointly involved in the working process, as shown in FIG. 2, and a current path such as i is assumeds1The current is shown flowing from the first winding point a through the switching tubes S1, S2 to point D, then through the diode D1, the load, D4 back to the second winding point C. When the controller detects that the output voltage is lower than the voltage switching point, the controller adjusts the control quantity of the high-frequency inverter circuit according to the winding switching proportion, and starts a four-step commutation process, as shown in fig. 3 and 4: firstly, at time t1, the switch tube S2 is turned off, the body diode of S2 is naturally conducted, and then the switch tube S3 is closed at time t2, and the current path is still is1At time t3, switching tube S1 is turned off, and at this time, no current flows through S1 and S2, the current passes through switching tube S3 and the body diode branch of switching tube S4, and finally, at time t4, switching tube S4 is closed, and the current flows from path is1Is switched to a path is2Seamless switching from high to low voltage is achieved.
As shown in FIG. 5, when the converter is in the output low voltage operation state, only the second winding is involved in the operation process, and the current path such as i is assumeds2The current is shown flowing from the point B of the second winding through the switching tubes S3, S4 to point D, then through the diode D1, the load, D4 back to the point C of the second winding. When the controller detects that the output voltage is higher than the voltage switching point, the controller adjusts the control quantity of the high-frequency inverter circuit according to the winding switching proportion, and starts a four-step commutation process, as shown in fig. 6 and 7: firstly, at time t1, the switch tube S4 is turned off, the body diode of S4 is naturally conducted, and then the switch tube S1 is closed at time t2, and the current path is still is2At time t3, the switch tube S3 is turned off, and at this time S3,S4 no longer has current, the current passes through the switch tube S1, the body diode branch of the switch tube S2, and finally the switch tube S2 is closed at the time t4, and the current passes through the path is2Is switched to a path is1Seamless switching from low voltage to high voltage is achieved.
As shown in fig. 5, in the actual charging process of the electric vehicle, the initial voltage of the battery is low, the controller controls the switching tubes S3 and S4 to be closed, S1 and S2 to be opened, the inverter operates in the low-voltage mode, the current path is2, and the devices participating in the operation are S3, S4, D1, D4 and the second winding; along with the rise of the voltage of the battery, when the output voltage reaches a voltage switching point, the controller adjusts the control quantity of the high-frequency inverter circuit according to the winding switching proportion, and simultaneously, the four-step current conversion mode is started to enable a current path to be switched from is2Switch to is1After the switching is finished, the devices participating in the operation are S1, S2, D1 and D4, a first winding and a second winding, and D3 and D4 are cut off due to the fact that the devices bear back voltage, so that the converter does not interrupt output voltage and current, and high-power constant output in a wide voltage range is achieved.
When i iss1And is2When the current flows in the reverse direction, the four-step commutation control process of the switching tubes S1, S2, S3 and S4 is symmetrical to the process.

Claims (6)

1. A switching method applied to a charging module transformer winding switching device is characterized in that: the transformer winding switching device comprises a high-frequency transformer, a switching tube, a controller, a driving circuit and a high-frequency inverter circuit, wherein the secondary side of the high-frequency transformer is provided with three taps, two taps are connected with the switching tube which is connected in series in an anti-reverse mode, and the controller controls the high-frequency inverter circuit and the switching tube through the driving circuit; when the output voltage of the transformer winding switching device is higher or lower than the set switching voltage, the controller adjusts the control quantity of the high-frequency inverter circuit according to the winding switching proportion, and simultaneously executes a four-step current conversion method to control the on or off of the switching tube, and the winding is switched from high voltage to low voltage or from low voltage to high voltage, so that the high-power output in a wide voltage range is realized.
2. The switching method applied to the winding switching device of the charging module transformer according to claim 1, wherein the winding switching method comprises the following steps: when the controller detects that the output voltage of the transformer winding switching device reaches a voltage switching point, the control quantity of the primary side high-frequency inverter circuit is adjusted according to the switching proportion Np: Ns1 or Np: Ns2 of the transformer winding, and the switching tube is controlled to be switched on or off according to the switching of the output voltage of the transformer winding switching device from high voltage to low voltage or from low voltage to high voltage.
3. The switching method applied to the charging module transformer winding switching device according to claim 2, wherein when the output voltage is switched from high voltage to low voltage, before the switching tube is operated, S1 and S2 are in an on state, S3 and S4 are in an off state, the controller executes a four-step commutation method, and the operation sequence of the switching tube is that S2 is turned off first, then S3 is turned on, S1 is turned off again, and finally S4 is turned on, so that four-step seamless commutation is realized; when the output voltage is switched from low voltage to high voltage, before the action of the switching tube, S1 and S2 are in an off state, S3 and S4 are in an on state, the controller executes a four-step commutation method, the action sequence of the switching tube is that S4 is turned off first, then S1 is turned on, S3 is turned off again, and finally S2 is turned on, so that four-step seamless commutation is realized.
4. The switching method applied to the winding switching device of the charging module transformer as claimed in claim 2, wherein the voltage switching point is determined according to the optimal output efficiency interval and the maximum output voltage of the low-voltage full power.
5. The switching method applied to the winding switching device of the charging module transformer as claimed in claim 2, wherein Np is the number of turns on the primary side of the transformer, Ns1 is the number of turns on the first winding of the transformer, and Ns2 is the number of turns on the second winding of the transformer.
6. The switching method applied to the winding switching device of the transformer of the charging module as claimed in claim 2, wherein the switching tubes S1, S2, S3 and S4 are MOS tubes or IGBT.
CN202010771314.7A 2020-05-23 2020-08-04 Switching method applied to charging module transformer winding switching device Withdrawn CN111835206A (en)

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CN2020104448648 2020-05-23
CN202010444864 2020-05-23

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112803519A (en) * 2020-12-31 2021-05-14 安克创新科技股份有限公司 Charging control circuit and charging equipment
CN116827145A (en) * 2023-03-29 2023-09-29 深圳市鸿嘉利新能源有限公司 Three-winding synchronous rectification output circuit for charging pile inversion module

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Publication number Priority date Publication date Assignee Title
CN101232254A (en) * 2008-02-27 2008-07-30 中国农业大学 Power transformer
CN101325124A (en) * 2008-04-24 2008-12-17 中国农业大学 Tapping switch for load voltage-regulating transformer and voltage-regulating transformer using the same
CN104660055A (en) * 2015-01-28 2015-05-27 珠海格力电器股份有限公司 Three-phase matrix frequency converter and air conditioning system
CN104883065A (en) * 2015-05-29 2015-09-02 西安交通大学 High-frequency isolation circuit, control method thereof and solid-state transformer
CN109861603A (en) * 2019-04-17 2019-06-07 深圳英飞源技术有限公司 A kind of transformer winding switching method
CN109936292A (en) * 2017-12-19 2019-06-25 深圳英飞源技术有限公司 Powerstat no-load voltage ratio DC-DC power inverter and its control method
CN209545445U (en) * 2019-03-14 2019-10-25 深圳英飞源技术有限公司 A kind of powerstat no-load voltage ratio DC-DC power inverter

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101232254A (en) * 2008-02-27 2008-07-30 中国农业大学 Power transformer
CN101325124A (en) * 2008-04-24 2008-12-17 中国农业大学 Tapping switch for load voltage-regulating transformer and voltage-regulating transformer using the same
CN104660055A (en) * 2015-01-28 2015-05-27 珠海格力电器股份有限公司 Three-phase matrix frequency converter and air conditioning system
CN104883065A (en) * 2015-05-29 2015-09-02 西安交通大学 High-frequency isolation circuit, control method thereof and solid-state transformer
CN109936292A (en) * 2017-12-19 2019-06-25 深圳英飞源技术有限公司 Powerstat no-load voltage ratio DC-DC power inverter and its control method
CN209545445U (en) * 2019-03-14 2019-10-25 深圳英飞源技术有限公司 A kind of powerstat no-load voltage ratio DC-DC power inverter
CN109861603A (en) * 2019-04-17 2019-06-07 深圳英飞源技术有限公司 A kind of transformer winding switching method

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112803519A (en) * 2020-12-31 2021-05-14 安克创新科技股份有限公司 Charging control circuit and charging equipment
CN116827145A (en) * 2023-03-29 2023-09-29 深圳市鸿嘉利新能源有限公司 Three-winding synchronous rectification output circuit for charging pile inversion module
CN116827145B (en) * 2023-03-29 2024-05-14 深圳市鸿嘉利新能源有限公司 Three-winding synchronous rectification output circuit for charging pile inversion module

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