CN107171576B - Voltage-doubling rectifying circuit and application thereof in resonant isolation converter - Google Patents

Voltage-doubling rectifying circuit and application thereof in resonant isolation converter Download PDF

Info

Publication number
CN107171576B
CN107171576B CN201710435858.4A CN201710435858A CN107171576B CN 107171576 B CN107171576 B CN 107171576B CN 201710435858 A CN201710435858 A CN 201710435858A CN 107171576 B CN107171576 B CN 107171576B
Authority
CN
China
Prior art keywords
diode
capacitor
circuit
voltage
switch
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN201710435858.4A
Other languages
Chinese (zh)
Other versions
CN107171576A (en
Inventor
王浩宇
尚明
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.)
University of Shanghai for Science and Technology
Original Assignee
University of Shanghai for Science and Technology
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by University of Shanghai for Science and Technology filed Critical University of Shanghai for Science and Technology
Priority to CN201710435858.4A priority Critical patent/CN107171576B/en
Publication of CN107171576A publication Critical patent/CN107171576A/en
Application granted granted Critical
Publication of CN107171576B publication Critical patent/CN107171576B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • 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
    • H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
    • H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
    • H02M7/06—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes without control electrode or semiconductor devices without control electrode
    • H02M7/10—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes without control electrode or semiconductor devices without control electrode arranged for operation in series, e.g. for multiplication of voltage
    • 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
    • H02M3/33507—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 with automatic control of the output voltage or current, e.g. flyback converters
    • H02M3/33523—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 with automatic control of the output voltage or current, e.g. flyback converters with galvanic isolation between input and output of both the power stage and the feedback loop
    • 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

Landscapes

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

Abstract

The invention provides a voltage-multiplying rectifying circuit which is characterized by comprising a diode D1、D2、D3、D4、D5、D6、D7、D8Capacitor C1、C2、C3、C4、C5、C6And 1 load. The invention also provides a resonance isolation converter, which comprises a transformer, wherein a primary circuit of the transformer is a full-bridge LLC resonance circuit. The circuit structure provided by the invention can effectively improve the conversion efficiency of the traditional LLC resonant circuit in a high-voltage wide-output scene. Meanwhile, the secondary side rectifying circuit can deduce various reconfigurable voltage doubling rectifying circuits, and the requirements of different levels of high voltage and wide output are met. The proposed reconfigurable rectifying circuit can also be applied to wide input circuits.

Description

Voltage-doubling rectifying circuit and application thereof in resonant isolation converter
Technical Field
The invention relates to a voltage-doubling rectifying circuit, in particular to a six-voltage-doubling rectifying circuit or a reconfigurable voltage-doubling rectifying circuit. The invention also relates to a resonance isolation converter applying the voltage-multiplying rectifying circuit or the reconfigurable voltage-multiplying rectifying circuit.
Background
With continuous innovation of power electronic technology, performance requirements for high efficiency, low power consumption and the like of a DC switching power supply are also continuously increased. The LLC resonant converter has advantages of simple structure, convenient control, high conversion efficiency, easy realization of zero voltage switching-on (ZVS) of the switching tube, and the like, and is widely used.
In some practical applications, the DC power supply needs to provide a wide output voltage range and have good output voltage regulation performance. However, in the case of a constant input voltage and an ultra wide output voltage range, the conversion efficiency of the LLC resonant converter is greatly reduced. This is because the LLC resonant converter is a frequency modulation topology, and its switching frequency requires a wide tuning range (as shown in fig. 1) when deployed in a wide voltage gain range application. As the switching frequency deviates from the resonant frequency, the conversion efficiency is significantly attenuated.
On the other hand, the secondary side of an LLC resonant converter often uses a conventional bridge rectification structure. Based on the following facts: a) voltage stress of the diodes of the bridge rectifier is equal to the output voltage, b) high voltage power diodes have problems of immature manufacturing process, high cost and the like, and the bridge rectifier is not considered as a preferred solution in high output voltage applications.
In summary, there are many problems to be solved when applying the LLC resonant circuit based on the conventional bridge rectifier to high-voltage and wide-output scenes.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: LLC resonant converters based on conventional bridge rectifiers have limitations in high voltage, wide output range applications.
In order to solve the above technical problem, an aspect of the present invention provides a voltage-doubler rectifier circuit, which is characterized by including a diode D1、D2、D3、D4、D5、D6、D7、D8Capacitor C1、C2、C3、C4、C5、C6Wherein: capacitor C1And a capacitor C4Is connected in series to a diode D2Anode and diode D5Between the cathodes, a diode D1Cathode and diode D2Diode D with connected anodes1The anode is connected with a capacitor C2Lower pin of (2), capacitor C2Upper pin and diode D3Anode and diode D2Negative electrode connected to capacitor C5Upper pin and capacitor C2The lower pin is connected with the upper port of the transformer, and the capacitor C5Lower pin of (2) connected diode D5Anode and diode D6Negative electrode, diode D4Anode and diode D5Negative pole connected to diode D4Negative electrode and capacitor C5Upper tube leg connected to diode D7Anode and diode D8Negative pole connected in series with the diode D3Anode and diode D6Between the cathodes, a capacitance C3And a capacitor C6Is connected in series to a diode D3Cathode and diode D6The lower port of the transformer is connected with a capacitor C between the positive electrodes1Lower pin of (2), diode D7Positive electrode and capacitor C3The lower pipe foot of (1) is provided with a lower pipe foot,diode D3A negative electrode as a positive output terminal of the power supply, and a diode D6The positive electrode is the negative output end of the power supply.
Preferably, the capacitance C1A switch S is arranged between the lower pin and the lower port of the transformer5And the phase connection is carried out to form a reconfigurable voltage-multiplying rectifying circuit.
Preferably, the switch S5Formed by two MOSFET tubes in series.
Preferably, the diode D7The anode and the lower port of the transformer pass through a switch S6And the phase connection is carried out to form a reconfigurable voltage-multiplying rectifying circuit.
Preferably, the switch S6Formed by two MOSFET tubes in series.
Preferably, in the diode D2A cathode and the capacitor C2Upper tube pin series switch S7In the diode D5Positive electrode and said capacitor C5Lower pin of the switch S8And forming a reconfigurable voltage-multiplying rectifying circuit.
Preferably, the switch S7And the switch S8A single MOSFET tube is used.
The invention also provides a resonance isolation converter, which comprises a transformer, wherein a primary circuit of the transformer is a full-bridge LLC resonance circuit.
The circuit structure provided by the invention can effectively solve the problem of low conversion efficiency of the traditional LLC resonant circuit in a high-voltage wide-output scene. Meanwhile, the secondary side rectifying circuit can derive various reconfigurable voltage doubling rectifying circuits so as to meet the high-voltage and wide-output requirements of different grades. The proposed reconfigurable rectifying circuit can also be applied to wide input circuits. The novel circuit formed by combining the primary side input circuits with different structures can well meet the requirements of different wide input circuit grades.
Drawings
FIG. 1 is a diagram illustrating a relationship between voltage gain and operating frequency in a conventional LLC circuit;
fig. 2 is a circuit diagram of a resonant isolated converter in embodiment 1;
fig. 3a is a circuit diagram of a resonant isolated converter in embodiment 2;
FIG. 3b shows a switch S of a reconfigurable voltage-doubler rectifier circuit in embodiment 25A closed equivalent circuit diagram;
FIG. 3c shows a switch S of a reconfigurable voltage-doubler rectifier circuit in embodiment 25An equivalent circuit diagram after disconnection;
fig. 4a is a circuit diagram of a resonant isolated converter in embodiment 3;
FIG. 4b shows a switch S of a reconfigurable voltage-doubler rectifier circuit in embodiment 35Closing, switch S6An equivalent circuit diagram after disconnection;
FIG. 4c shows a switch S of a reconfigurable voltage-doubler rectifier circuit in embodiment 35Switch-off, switch S6A closed equivalent circuit diagram;
FIG. 4d shows a switch S of a reconfigurable voltage-doubler rectifier circuit in embodiment 35Switch-off, switch S6An equivalent circuit diagram after disconnection;
FIG. 5 shows the switch S of embodiment 3 and embodiment 35And a switch S6A schematic diagram of (a);
fig. 6a is a circuit diagram of a resonant isolated converter in embodiment 4;
FIG. 6b shows a switch S of a reconfigurable voltage-doubler rectifier circuit in embodiment 47Switch-off, switch S8An equivalent circuit diagram after disconnection;
FIG. 6c shows a switch S of a reconfigurable voltage-doubler rectifier circuit in embodiment 47Closing, switch S8An equivalent circuit diagram after disconnection;
FIG. 6d shows a switch S of the reconfigurable voltage-doubler rectification circuit in embodiment 47Closing, switch S8A closed equivalent circuit diagram;
FIG. 7 is a graph showing the relationship between the voltage gain and the operating frequency in the circuit of embodiment 2;
FIG. 8 is a graph showing the relationship between the voltage gain and the operating frequency in the circuit of embodiment 3;
fig. 9 shows the relationship between the voltage gain and the operating frequency in the circuit of embodiment 4.
Detailed Description
In order to make the invention more comprehensible, preferred embodiments are described in detail below with reference to the accompanying drawings.
Example 1
As shown in fig. 2, the resonant isolated converter disclosed in this embodiment includes a transformer, a primary side circuit of the transformer is a conventional full-bridge LLC resonant circuit, and a secondary side circuit of the transformer is a six-fold voltage rectifying circuit.
The topology structure of the six-time voltage rectification circuit comprises 8 diodes, 6 capacitors and 1 load R, and the specific connection relationship is described as follows: capacitor C1And C4Is connected in series to a diode D2Anode and diode D5Between the cathodes, a diode D1Cathode and diode D2Diode D with connected anodes1The anode is connected with a capacitor C2Lower pin of (2), capacitor C2Upper pin and diode D3Anode and diode D2Negative electrode connected to capacitor C5Upper pin and capacitor C2The lower pin is connected with the upper port of the transformer, and the capacitor C5Lower pin of (2) connected diode D5Anode and diode D6Negative electrode, diode D4Anode and diode D5Negative pole connected to diode D4Negative electrode and capacitor C5Upper tube leg connected to diode D7Anode and diode D8Negative pole connected in series with the diode D3Anode and diode D6Between the cathodes, a capacitance C3And a capacitor C6Is connected in series to a diode D3Cathode and diode D6The lower port of the transformer is connected with a capacitor C between the positive electrodes1Lower pin of (2), diode D7Positive electrode and capacitor C3Lower pin of (2), diode D3A negative electrode as a positive output terminal of the power supply, and a diode D6The positive electrode is the negative output end of the power supply.
The circuit topology of the six-time voltage-regulating circuit provided by the invention has the working effect of the six-time voltage-regulating circuit. And the requirement of high output voltage can be well met by combining primary circuits with different structures and the turn ratio of the transformer. Meanwhile, in order to better meet the requirement of a wide output voltage range and ensure high conversion efficiency under the condition of a full output range, the invention further develops three novel circuit structures disclosed in the following embodiments on the basis of the proposed circuit.
Example 2
As shown in fig. 3a, the present embodiment is different from embodiment 1 in that: the original capacitor C1The point at which the lower pin is connected with the lower port of the transformer is disconnected, and the lower pin is connected with the lower port of the transformer through a switch S5The connection is made. With reference to FIG. 5, switch S5Formed by two MOSFET tubes in series.
When the switch S is turned on, as shown in FIG. 3b5When closed, the secondary side circuit is equivalent to a six-time voltage rectifying circuit. When the switch S is turned on, as shown in FIG. 3c5When the circuit is disconnected, the secondary side circuit is equivalent to a quadruple voltage rectifying circuit. When the circuit works, the secondary side circuit is not added with any device compared with the traditional four-voltage-multiplying and six-voltage-multiplying circuits. Thus, the proposed circuit does not add extra device losses. For the proposed circuit, the requirement of wide output voltage range can be well ensured through the transformation of the secondary side circuit structure.
The input voltage of the circuit disclosed in this embodiment is set to 390V, the resonance frequency is set to 100kHz, and the output voltage range is set to [500V, 1100V ]. As shown in fig. 7, the corresponding switching frequency adjustment range is [72kHz, 129kHz ]. Compared with a traditional LLC resonant circuit based on bridge rectification, the range of the switching frequency is smaller under the condition of the same output voltage range. The swing range of the switching frequency is close to the vicinity of the resonance point, and the high conversion efficiency of the whole circuit is ensured.
Example 3
As shown in fig. 4a, the present embodiment is different from embodiment 2 in that: diode D7The point where the positive electrode is connected with the lower port of the transformer is disconnected, and the point is connected with the lower port of the transformer through a switch S6The connection is made. With reference to FIG. 5, switch S6Again formed by two MOSFET tubes in series.
When the switch S is turned on, as shown in FIG. 4b5Closed and switch S6When disconnected, the secondary side circuit is equivalent toA six-time voltage rectifying circuit. When the switch S is turned on, as shown in FIG. 4c5Open and switch S6When the circuit is closed, the secondary side circuit is equivalent to a quadruple voltage rectifying circuit. When the switch S is turned on, as shown in FIG. 4d5Open and switch S6When the secondary side circuit is disconnected, the secondary side circuit is equivalent to a voltage doubling rectifying circuit. It is possible to further widen the range of the output voltage with respect to the circuit shown in embodiment 2.
The input voltage of the circuit disclosed in this embodiment is set to 390V, the resonance frequency is set to 100kHz, and the output voltage range is set to [260V, 950V ]. As shown in fig. 8, the corresponding switching frequency adjustment range is 85kHz, 118 kHz. Compared with the circuit in the embodiment 2, the output voltage range is wider, the switching frequency range is smaller, and the switching frequency swing range is closer to the resonance point, so that the high conversion efficiency of the whole circuit is further ensured.
Example 4
As shown in fig. 6a, the present embodiment is different from embodiment 1 in that: in the diode D2Cathode and diode D5The positive poles are respectively connected with a switch S in series7And switch S8. Wherein, the switch S7And switch S8Are all replaced by MOSFET tubes. When the switch S is turned on, as shown in FIG. 6b7Open and switch S8When the circuit is disconnected, the secondary side circuit is equivalent to a quadruple voltage rectifying circuit. When the switch S is turned on, as shown in FIG. 6c7Closed and switch S8When the circuit is disconnected, the secondary side circuit is equivalent to a five-fold voltage rectifying circuit. As shown in fig. 6d, when the switch S is turned on7Closed and switch S8When the secondary side circuit is closed, the working state of the secondary side circuit is equivalent to a six-time voltage rectification circuit. Compared with the circuit shown in embodiment 2, the switching frequency range can be further reduced on the premise that the ranges of the output voltages are the same.
The input voltage of the circuit disclosed in this embodiment is set to 390V, the resonance frequency is set to 100kHz, and the output voltage range is set to 250V, 420V. As shown in fig. 9, the corresponding operating frequency adjustment range is [80kHz, 120kHz ]. Compared with the circuit in the embodiment 1, under the condition that the output voltage range is the same, the switching frequency range is smaller, and the switching frequency swing range is closer to the vicinity of the resonance point, so that the high conversion efficiency of the whole circuit is further ensured.

Claims (3)

1. A voltage doubling rectifying circuit is characterized by comprising a diode D1、D2、D3、D4、D5、D6、D7、D8Capacitor C1、C2、C3、C4、C5、C6Wherein: capacitor C1And a capacitor C4Is connected in series to a diode D2Anode and diode D5Between the cathodes, a diode D1Cathode and diode D2Diode D with connected anodes1The anode is connected with a capacitor C2Lower pin of (2), capacitor C2Upper pin and diode D3Positive electrode connected to capacitor C2Upper tube pin series switch S7Rear AND diode D2Negative electrode connected to capacitor C5Upper pin and capacitor C2The lower pin is connected with the upper port of the transformer, and the capacitor C5Lower pin of (2) connected diode D6Negative electrode, capacitor C5Lower pin series switch S8Rear connection diode D5Anode, diode D4Anode and diode D5Negative pole connected to diode D4Negative electrode and capacitor C5Upper tube leg connected to diode D7Anode and diode D8Negative pole connected in series with the diode D3Anode and diode D6Between the cathodes, a capacitance C3And a capacitor C6Is connected in series to a diode D3Cathode and diode D6The lower port of the transformer is connected with a capacitor C between the positive electrodes1Lower pin of (2), diode D7Positive electrode and capacitor C3Lower pin of (2), diode D3A negative electrode as a positive output terminal of the power supply, and a diode D6The positive electrode is a negative output end of the power supply; in the diode D5Positive electrode and said capacitor C5Lower pin of the switch S8。
2. A voltage doubler rectifier circuit as claimed in claim 1, wherein said switch S7And the switch S8A single MOSFET tube is used.
3. A resonance isolation converter comprises a transformer, a primary side circuit of the transformer is a full-bridge LLC resonance circuit, and the resonance isolation converter is characterized in that a secondary side circuit of the transformer is the voltage-multiplying rectification circuit according to any one of claims 1 and 2.
CN201710435858.4A 2017-06-09 2017-06-09 Voltage-doubling rectifying circuit and application thereof in resonant isolation converter Active CN107171576B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201710435858.4A CN107171576B (en) 2017-06-09 2017-06-09 Voltage-doubling rectifying circuit and application thereof in resonant isolation converter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201710435858.4A CN107171576B (en) 2017-06-09 2017-06-09 Voltage-doubling rectifying circuit and application thereof in resonant isolation converter

Publications (2)

Publication Number Publication Date
CN107171576A CN107171576A (en) 2017-09-15
CN107171576B true CN107171576B (en) 2019-12-31

Family

ID=59825522

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201710435858.4A Active CN107171576B (en) 2017-06-09 2017-06-09 Voltage-doubling rectifying circuit and application thereof in resonant isolation converter

Country Status (1)

Country Link
CN (1) CN107171576B (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109756142B (en) * 2019-01-24 2021-06-22 上海科技大学 Reconfigurable H5 inverter bridge and single-directional resonant converter based on inverter bridge
CN110932557B (en) * 2019-11-29 2021-01-12 山东科技大学 High-gain quasi-resonant DC-DC converter based on voltage doubling rectifying circuit
CN114884363B (en) * 2022-05-10 2023-03-21 西南交通大学 Double LLC resonant converter with six-time gain ratio and control method thereof

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08308229A (en) * 1995-05-01 1996-11-22 Takeaki Kukihara Distortionless rectifying circuit
JPH11299241A (en) * 1998-04-15 1999-10-29 Meiji Natl Ind Co Ltd Voltage doubler circuit
CN201937936U (en) * 2010-10-22 2011-08-17 陶荣泰 Super energy-saving fluorescent lamp with long service life
CN103904904A (en) * 2014-04-17 2014-07-02 南京航空航天大学 Dual-voltage amplifying high-gain high-frequency rectifying isolating converter
CN103887987B (en) * 2014-04-17 2016-08-17 南京航空航天大学 A kind of multiple multiplication of voltage high-gain high-frequency rectification isolated converter based on switching capacity

Also Published As

Publication number Publication date
CN107171576A (en) 2017-09-15

Similar Documents

Publication Publication Date Title
Gui et al. A high voltage-gain LLC micro-converter with high efficiency in wide input range for PV applications
US8125158B2 (en) Insulation type AC-DC converter and LED DC power supply device using the same
CN106685231B (en) A kind of primary side clamper type soft switch full bridge converter and its asymmetric control method
CN110190752B (en) Bidirectional CLLLC-DCX resonant converter and control method thereof
US10454383B1 (en) Bidirectional resonant direct current-direct current conversion circuit and uninterruptible power supply
CN107171576B (en) Voltage-doubling rectifying circuit and application thereof in resonant isolation converter
TWI384743B (en) Multi-phase switching power converting circuit
TW200929814A (en) DC transformer
CN105226929A (en) A kind of change mode cascade converter
CN112087143B (en) Quasi-parallel resonant converter with multi-end input and single-end output
CN104393762B (en) High step-up ratio DC-DC converter circuit based on wireless power transmission
CN111669055A (en) Voltage conversion circuit and control method thereof
TWI691823B (en) Power supply device and control method thereof
EP2975753B1 (en) A three-level converter
WO2022000217A1 (en) Resonant converter, and voltage conversion method
CN110445387B (en) Topological structure and control method of formation and grading power supply
CN105576980A (en) Current feed converter
TWI807472B (en) Converter for a wide range of output voltage and control method thereof
CN110829853A (en) High-power strong complex displacement phase full-bridge zero-voltage zero-current soft switching direct-current converter
CN110620515A (en) Secondary LLC resonant power conversion circuit
TWI737177B (en) Bridgeless step-up and step-down ac-to-dc converter
WO2024051320A1 (en) Wide-range efficient isolated bidirectional converter
CN210351019U (en) Direct current transformation circuit and inverter
CN109921646A (en) A kind of PFC and LLC mixing isolation type switch power
CN216774624U (en) High-voltage gain soft switching DC-DC converter

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant