WO2024051317A1 - Convertisseur bidirectionnel à isolation efficace à plage étendue à entrelacement triphasé - Google Patents

Convertisseur bidirectionnel à isolation efficace à plage étendue à entrelacement triphasé Download PDF

Info

Publication number
WO2024051317A1
WO2024051317A1 PCT/CN2023/104672 CN2023104672W WO2024051317A1 WO 2024051317 A1 WO2024051317 A1 WO 2024051317A1 CN 2023104672 W CN2023104672 W CN 2023104672W WO 2024051317 A1 WO2024051317 A1 WO 2024051317A1
Authority
WO
WIPO (PCT)
Prior art keywords
inductor
capacitor
phase
circuit
bidirectional converter
Prior art date
Application number
PCT/CN2023/104672
Other languages
English (en)
Chinese (zh)
Inventor
向小路
李俊敏
Original Assignee
深圳深源技术能源有限公司
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 深圳深源技术能源有限公司 filed Critical 深圳深源技术能源有限公司
Publication of WO2024051317A1 publication Critical patent/WO2024051317A1/fr

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
    • 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
    • H02M3/3353—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 at least two simultaneously operating switches on the input side, e.g. "double forward" or "double (switched) flyback" converter
    • 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
    • H02M3/01—Resonant DC/DC converters
    • 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

Definitions

  • This application relates to the field of power conversion technology, and more specifically to a three-phase interleaved wide-range high-efficiency isolated bidirectional converter.
  • DC-DC bidirectional converter is a DC/DC converter that can adjust the two-way transmission of energy according to needs. It is mainly used in energy storage systems, vehicle power systems, feedback charging and discharging systems, hybrid energy electric vehicles and other occasions. As the industry continues to With the development, the power continues to increase from kilowatt level to tens of kilowatt level, and topologies that can achieve high power, wide range, forward and reverse symmetric bidirectional, and high efficiency have become the general trend.
  • the DAB hard switch and LLC two-level topology architecture will bring about the problem of low efficiency, especially for higher power bidirectional DC-DC. Due to the inherent problems of DAB or two-stage topology, as the power continues to increase, the heat and ripple of high-power bidirectional DC-DC will become increasingly large. It is difficult to handle and will eventually become a bottleneck.
  • the technical problem to be solved by this application is to provide a three-phase interleaved wide-range high-efficiency isolated bidirectional converter that can reduce ripple while achieving wide range, completely symmetrical forward and reverse gains and high efficiency.
  • this application provides a three-phase interleaved wide range high-efficiency isolated bidirectional converter, including a three-phase bridge switching circuit, a resonant cavity, three transformers and a three-phase bridge rectifier circuit.
  • the three-phase bridge One side of the switching circuit and the three-phase bridge rectifier circuit serves as the first connection side and the second connection side of the three-phase interleaved wide-range high-efficiency isolation bidirectional converter respectively.
  • the resonant cavity includes three resonant circuits, and the three resonant circuits The circuits are respectively connected between the midpoints of the three bridge arms of the three-phase bridge switch circuit and the primary windings of the three transformers, where,
  • the resonant circuit includes a first capacitor, a second capacitor, a third capacitor, a first inductor, a second inductor and a third inductor.
  • One end of the first inductor is connected to one end of the second inductor, the first capacitor and the third capacitor.
  • the other ends of the first inductor and the first capacitor are respectively connected to one end of the third inductor and the second capacitor, and the one end of the third inductor is connected to the midpoint of a bridge arm in the three-phase bridge switch circuit, and the third
  • the other ends of the second inductor and the third capacitor are respectively connected to the other ends of the third inductor and the second capacitor, and connected to the primary winding of a transformer, and the ends of the second capacitor and the first capacitor in the three resonant circuits are connected to each other respectively.
  • the connections form a Y-shaped connection.
  • the same-named ends of the three transformer secondary windings correspond to the midpoints of the three bridge arms connected to the three-phase bridge rectifier circuit.
  • the different-named ends of the three transformer secondary windings are connected to each other to form a Y-shaped connection. .
  • the three-phase bridge switch circuit includes six switch tubes, and each two switch tubes are connected in series to form a bridge arm. After the three bridge arms are connected in parallel, its two ends serve as a three-phase interleaved wide-range high-efficiency isolation bidirectional conversion. the first connection side of the device.
  • the three-phase bridge rectifier circuit includes six switch tubes, and each two switch tubes are connected in series to form a bridge arm. After the three bridge arms are connected in parallel, their two ends serve as a three-phase interleaved wide range high-efficiency isolation bidirectional conversion. the second connection side of the device.
  • the switching tube is selected from MOSFET, IGBT tube, GaN tube or SiC power tube.
  • the three-phase interleaved wide-range high-efficiency isolated bidirectional converter also includes a first filter capacitor and a second filter capacitor, and both ends of the first filter capacitor are connected to the three-phase interleaved wide-range high-efficiency isolated bidirectional converter.
  • the first connection side of the second filter capacitor is connected to the second connection side.
  • this application also provides a three-phase interleaved wide range high-efficiency isolated bidirectional converter, including a three-phase bridge switching circuit, a resonant cavity, three transformers and a three-phase bridge rectifier circuit.
  • the three-phase bridge One side of the switch circuit and the three-phase bridge rectifier circuit serves as the first connection side and the second connection side of the three-phase interleaved wide-range high-efficiency isolated bidirectional converter respectively.
  • the resonant cavity includes three resonant circuits, and the three resonant circuits are The resonant circuits are respectively connected to the midpoints of the three bridge arms of the three-phase bridge switch circuit and between the three primary windings of the transformer, where,
  • the resonant circuit includes a first capacitor, a second capacitor, a third capacitor, a first inductor, a second inductor and a third inductor.
  • One end of the first inductor is connected to one end of the second inductor, the first capacitor and the third capacitor.
  • the other ends of the first inductor and the first capacitor are respectively connected to one end of the third inductor and the second capacitor, and the one end of the second capacitor is connected to the midpoint of a bridge arm in the three-phase bridge switch circuit
  • the third The other ends of the second inductor and the third capacitor are respectively connected to the other ends of the third inductor and the second capacitor, and connected to the primary winding of a transformer, and one end of the third inductor and the first inductor in the three resonant circuits are connected to each other respectively.
  • the connections form a Y-shaped connection.
  • the same-named ends of the three transformer secondary windings correspond to the midpoints of the three bridge arms connected to the three-phase bridge rectifier circuit.
  • the different-named ends of the three transformer secondary windings are connected to each other to form a Y-shaped connection. .
  • this application also provides a three-phase interleaved wide range high-efficiency isolated bidirectional converter, including a three-phase bridge switching circuit, a resonant cavity, three transformers and a three-phase bridge rectifier circuit.
  • the three-phase bridge One side of the switch circuit and the three-phase bridge rectifier circuit serves as the first connection side and the second connection side of the three-phase interleaved wide-range high-efficiency isolated bidirectional converter respectively.
  • the resonant cavity includes three resonant circuits, and the three resonant circuits are The resonant circuits are respectively connected to the midpoints of the three bridge arms of the three-phase bridge switch circuit and between the three primary windings of the transformer, where,
  • the resonant circuit includes a first capacitor, a second capacitor, a first inductor, a second inductor and a third inductor.
  • One end of the first inductor and the second inductor is connected to one end of the first capacitor and the second capacitor.
  • the other end of an inductor is connected to one end of the third inductor and to the midpoint of a bridge arm in the three-phase bridge switch circuit, the other ends of the second inductor and the second capacitor are connected to the primary winding of a transformer, and The other end of the second inductor is connected to the other end of the third inductor.
  • the other ends of the first capacitors in the three resonant circuits are connected to each other to form a Y-shaped connection.
  • the same ends of the three transformer secondary windings are connected to three corresponding ends.
  • the midpoints of the three bridge arms of the phase bridge rectifier circuit and the opposite ends of the three transformer secondary windings are connected to each other to form a Y-shaped
  • this application also provides a three-phase interleaved wide range high-efficiency isolated bidirectional converter, including a three-phase bridge switching circuit, a resonant cavity, three transformers and a three-phase bridge rectifier circuit.
  • the three-phase bridge One side of the switch circuit and the three-phase bridge rectifier circuit serves as the first connection side and the second connection side of the three-phase interleaved wide-range high-efficiency isolated bidirectional converter respectively.
  • the resonant cavity includes three resonant circuits, and the three resonant circuits are The resonant circuits are respectively connected to the midpoints of the three bridge arms of the three-phase bridge switch circuit and between the three primary windings of the transformer, where,
  • the resonant circuit includes a first capacitor, a second capacitor, a first inductor, a second inductor and a third inductor.
  • One end of the first inductor is connected to the first capacitor and one end of the third inductor.
  • One end of the second inductor is connected to one end of the second capacitor.
  • the other end of the first capacitor is connected to the midpoint of one bridge arm in the three-phase bridge switch circuit.
  • the other end of the second inductor is connected to the second capacitor.
  • the primary winding of a transformer and the other end of the second inductor is connected to the other end of the first inductor, and the identical ends of the secondary windings of the three transformers are respectively connected to the midpoints of the three bridge arms of the three-phase bridge rectifier circuit, The opposite ends of the primary windings and secondary windings of the three transformers are connected to each other to form a Y-shaped connection.
  • each circuit in the three-phase interleaved wide-range high-efficiency isolated bidirectional converter of the present application adopts three-phase interleaved technology to reduce ripples, and the equivalent circuit of the resonant circuit is even when the energy flows forward and reverse. It is a multi-component resonant circuit, which realizes soft switching when working in forward and reverse directions, and the loss is small, which solves the problem that the traditional LLC resonant circuit cannot work with the same performance in the reverse direction. That is, the three-phase interleaved wide range high-efficiency isolated bidirectional converter of the present application can perform energy reverse operation.
  • the voltage can be boosted when flowing in the forward direction, which can effectively increase the input and output voltage range of the converter and achieve a wide voltage range output.
  • the gain is the same when the energy flows forward and reverse.
  • the structural design of the resonant circuit of this application when using switching frequency modulation control, A wide voltage range output can be achieved without wide-band control, that is, the switching control frequency can be compressed and narrowed to improve efficiency.
  • Figure 1 is a circuit schematic diagram of the first embodiment of the three-phase interleaved wide-range high-efficiency isolated bidirectional converter of the present application.
  • Figure 2 is a circuit schematic diagram of the second embodiment of the three-phase interleaved wide-range high-efficiency isolated bidirectional converter of the present application.
  • Figure 3 is a circuit schematic diagram of the third embodiment of the three-phase interleaved wide-range high-efficiency isolated bidirectional converter of the present application.
  • Figure 4 is a circuit schematic diagram of the fourth embodiment of the three-phase interleaved wide-range high-efficiency isolated bidirectional converter of the present application.
  • FIG. 1 is a circuit schematic diagram of a first embodiment of a three-phase interleaved wide-range high-efficiency isolated bidirectional converter 10 of the present application.
  • the three-phase interleaved wide-range high-efficiency isolated bidirectional converter 10 includes a three-phase bridge switching circuit 100, a resonant cavity 200, three transformers and a three-phase bridge rectifier circuit 300.
  • One side of the three-phase bridge switching circuit 100 and the three-phase bridge rectifier circuit 300 serves as the first connection side and the second connection side of the converter 10 respectively to connect the power supply or the load.
  • the resonant cavity 200 includes three resonators.
  • the three resonant circuits are respectively connected between the midpoints of the three bridge arms of the three-phase bridge switch circuit 100 and the three primary windings of the transformer.
  • the resonant circuit includes a first capacitor, a second capacitor, a third capacitor, a first inductor, a second inductor and a third inductor.
  • One end of the first inductor is connected to the second inductor, the first capacitor and the third capacitor.
  • One end of the first inductor and the first capacitor is connected to one end of the third inductor and the second capacitor respectively, and the one end of the third inductor is connected to the midpoint of one bridge arm in the three-phase bridge switch circuit 100,
  • the other ends of the second inductor and the third capacitor are respectively connected to the other ends of the third inductor and the second capacitor, and connected to the primary winding of a transformer, and the second capacitor is connected to the first capacitor in the three resonant circuits.
  • One end is connected to each other to form a Y-shaped connection
  • the same-named ends of the three transformer secondary windings are respectively connected to the midpoints of the three bridge arms of the three-phase bridge rectifier circuit 300
  • the different-named ends of the three transformer secondary windings are respectively connected to each other.
  • Form a Y-shaped connection Preferably, the first inductor and the second inductor in the resonant circuit have the same inductance, and the first capacitor and the third capacitor have the same capacitance. Understandably, a Y-shaped connection is used in the resonant circuit. The total current flowing into the midpoint of the Y-shaped connection is equal to the total current flowing out of the midpoint of the Y-shaped connection.
  • the sum of the currents of the three resonant circuits is "0", so any At all times, the current of one resonant circuit is the sum of the currents of the other two resonant circuits. Even if the resonant parameters of each resonant circuit have a certain tolerance during the entire switching cycle, the deviation of their current effective values is also very small. This ensures the current balance between the three resonant circuits and prevents excessive current in one resonant circuit from causing damage or overheating of components in the circuit.
  • the resonant cavity 200 includes a first resonant circuit, a second resonant circuit and a third resonant circuit, and the three transformers include a first transformer T1, a second transformer T2 and a third transformer T3.
  • the first resonant circuit includes a first capacitor C1, a second capacitor C2, a third capacitor C3, a first inductor L1, a second inductor L2 and a third inductor L3.
  • the second resonant circuit includes a first capacitor C4, a second capacitor C4 and a third inductor L3. C5, the third capacitor C6, the first inductor L4, the second inductor L5 and the third inductor L6.
  • the third resonant circuit includes the first capacitor C7, the second capacitor C8, the third capacitor C9, the first inductor L7 and the third inductor L6.
  • the third inductor L3, the third inductor L6 and the third inductor L9 respectively correspond to the three inductors connected to the three-phase bridge switch circuit 100.
  • the second capacitor C2, the second capacitor C5 and the second capacitor C8 are respectively connected to each other to form a Y-shaped connection, and the second inductor L2, the second inductor L5 and the second inductor L8 are respectively connected to the first transformer T1, The same terminals of the primary windings of the second transformer T2 and the third transformer T3; and the third capacitor C3, the third capacitor C6 and the third capacitor C9 are respectively connected to the terminals of the primary windings of the first transformer T1, the second transformer T2 and the third transformer T3. Alien name.
  • the first connection side of the three-phase interleaved wide-range high-efficiency isolation bidirectional converter 10 when energy flows in the forward direction, that is, when energy flows from the first connection side to the second connection side, the first connection side of the three-phase interleaved wide-range high-efficiency isolation bidirectional converter 10 serves as the DC input end and can be connected externally.
  • the second connection side of the power supply serves as the DC output end and can be connected to an external load; when the energy flows in the reverse direction, that is, when the energy flows from the second connection side to the first connection side, the three-phase interleaved wide range high-efficiency isolation bidirectional converter
  • the second connection side of 10 serves as the DC input end, and the first connection side serves as the DC output end.
  • the three-phase interleaved wide-range high-efficiency isolated bidirectional converter 10 of the present application has a simple structure.
  • the equivalent circuit of the resonant circuit is a multi-element resonant circuit. Soft switching can be achieved in both forward and reverse operation, and the loss is small. It solves the problem of insufficient reverse gain of the traditional LLC resonant circuit, that is, the voltage can be boosted when energy flows from the second connection side to the first connection side, which can effectively increase the input and output voltage range of the converter 10 and achieve a wide voltage range input and output.
  • the three-phase interleaved wide-range high-efficiency isolated bidirectional converter of this application 10 Because the resonant frequency of the redesigned resonant circuit is smaller, wide-voltage range output can be achieved without wide-band control when using switching frequency modulation control, that is, the switching control frequency can be compressed and narrowed to improve efficiency.
  • the three-phase bridge switch circuit 100 includes a first switch Q1, a second switch Q2, a third switch Q3, a fourth switch Q4, a fifth switch Q5, and a sixth switch.
  • Tube Q6 has a total of six switching tubes, and each two switching tubes are connected in series to form a bridge arm. After the three bridge arms are connected in parallel, its two ends serve as the first connection side of the three-phase interleaved wide range high-efficiency isolation bidirectional converter 10, wherein, the The midpoint of the bridge arm formed by the series connection of the first switching tube Q1 and the second switching tube Q2 is connected to the first resonant circuit.
  • the midpoint of the bridge arm formed by the series connection of the third switching tube Q3 and the fourth switching tube Q4 is connected with the second resonant circuit.
  • the resonant circuit is connected, and the midpoint of the bridge arm formed by the series connection of the fifth switching tube Q5 and the sixth switching tube Q6 is connected to the third resonant circuit.
  • the PFM method is used to control the operation of the switching tube, that is, a constant duty cycle is used to constant the on and off times of the switching tube, and then the square wave frequency is modulated to achieve adjustment.
  • a constant duty cycle is used to constant the on and off times of the switching tube, and then the square wave frequency is modulated to achieve adjustment.
  • Three methods in the existing technology The switching frequency of the interleaved bidirectional converter requires wide-bandwidth control to achieve a wide range of voltage input and output.
  • the switching frequency when 40v needs to be boosted to 400v, the switching frequency needs to be at full load.
  • the frequency is as high as 200KHZ at full load and as high as 250KHZ at no load.
  • the switching frequency control range of the three-phase interleaved wide-range high-efficiency isolated bidirectional converter 10 of this application is relatively small.
  • the switching frequency is only 160KHZ at full load, and the efficiency is high.
  • the three-phase bridge rectifier circuit 300 includes a seventh switching tube Q7, an eighth switching tube Q8, a ninth switching tube Q9, a tenth switching tube Q10, and an eleventh switching tube Q11. and the twelfth switching tube Q12 and six switching tubes.
  • Each two switching tubes are connected in series to form a bridge arm. After the three bridge arms are connected in parallel, their two ends serve as the second connection side of the three-phase interleaved wide range high-efficiency isolation bidirectional converter 10.
  • the midpoint of the bridge arm formed by the series connection of the seventh switching tube Q7 and the eighth switching tube Q8 is connected to the secondary winding of the first transformer T1, and the ninth switching tube Q9 and the tenth switching tube Q10 are connected in series.
  • the midpoint of the bridge arm is connected to the secondary winding of the second transformer T2, and the midpoint of the bridge arm composed of the eleventh switching transistor Q11 and the twelfth switching transistor Q12 connected in series is connected to the secondary winding of the third transformer T3.
  • the switch tube can be a MOSFET, IGBT tube, GaN tube, SiC power tube or other controllable power switch tube to achieve better circuit performance.
  • a diode can also be connected in parallel.
  • the three-phase interleaved wide-range high-efficiency isolated bidirectional converter 10 also includes a first filter capacitor C10 and a second filter capacitor C11. Both ends of the first filter capacitor C10 are connected to the three-phase interleaved wide-range high-efficiency isolated bidirectional converter. The first connection side of the converter 10, and both ends of the second filter capacitor C11 are connected to the second connection side of the three-phase interleaved wide range high-efficiency isolation bidirectional converter 10.
  • the switching frequency of the switch tube Q6 is used to realize the wide range voltage output of the three-phase interleaved wide range high-efficiency isolation bidirectional converter 10, and the two switch tubes on each bridge arm are complementary to conduct, which can realize soft switching of the circuit; reverse energy transmission
  • the equivalent circuit of the resonant circuit is also a multi-element resonant circuit.
  • the seventh switching tube Q7, the eighth switching tube Q8, the ninth switching tube Q9, the tenth switching tube Q10, the eleventh switching tube Q11 and The switching frequency of the twelfth switch Q12 can achieve the same wide range voltage output as during forward transmission, and the two switch tubes on each bridge arm are complementary to conduct, realizing soft switching of the circuit.
  • the three-phase interleaved wide-range high-efficiency isolated bidirectional converter 10 of this application adopts three-phase interleaved technology.
  • the conduction phase differences between Q1 and Q2, Q3 and Q4, Q5 and Q6 are all 180 degrees.
  • the conduction timing of Q1, Q3 and Q5 is The difference is 120 degrees from each other; therefore, the conduction timings of Q2, Q4, and Q6 are also 120 degrees different from each other, and the three-phase input and output currents are 120 degrees different from each other.
  • the input and output current fluctuations of the three-phase circuit are complementary, making the input and output current ripples smaller, thus Achieve better circuit performance. At any time, at least one and at most two of Q1, Q3, and Q5 will be turned on.
  • the seventh switching tube Q7 is turned on, and the second filter capacitor C11 realizes rectification and filtering of the output voltage of the first transformer T1 to output a stable voltage and control the output current; when Q2, Q3 and Q5 are turned on , the resonant DC reverse voltage is transmitted to the first transformer T1 through the second switching tube Q2.
  • the reverse current value of the first resonant circuit increases, supplying power to the first transformer T1, and the eighth switching tube Q8 is turned on to realize the power supply to the first transformer T1.
  • the output voltage of a transformer T1 is rectified and filtered to output a stable voltage and control the output current. In the same way, the working principles of the other two resonant circuits are consistent with this circuit.
  • Figure 2 is a circuit schematic diagram of the second embodiment of the three-phase interleaved wide range high-efficiency isolated bidirectional converter 10 of the present application.
  • the difference between this embodiment and the first embodiment lies in the resonant circuit and the inverter circuit in the resonant cavity 200.
  • the rest of the circuit structure is the same or similar.
  • the midpoint of the bridge arm formed by the series connection of the first switch Q1 and the second switch Q2 is connected to the second capacitor C2 in the first resonant circuit
  • the third switch Q3 and the fourth switch The midpoint of the bridge arm formed by the series connection of the tube Q4 is connected to the second capacitor C5 in the second resonant circuit.
  • the midpoint of the bridge arm formed by the series connection of the fifth switching tube Q5 and the sixth switching tube Q6 is connected with the third capacitor C5 in the third resonant circuit.
  • the two capacitors C8 are connected, the third inductor L3, the third inductor L6 and the third inductor L9 are respectively connected to each other to form a Y-shaped connection, the third capacitor C3, the third capacitor C6 and the third capacitor C9 are respectively connected to the first transformer T1 , the same terminals of the primary windings of the second transformer T2 and the third transformer T3; and the second inductor L2, the second inductor L5 and the second inductor L8 are respectively connected to the primary windings of the first transformer T1, the second transformer T2 and the third transformer T3.
  • the opposite name is respectively connected to the primary windings of the first transformer T1, the second transformer T2 and the third transformer T3.
  • Figure 3 is a circuit schematic diagram of the third embodiment of the three-phase interleaved wide range high-efficiency isolated bidirectional converter 10 of the present application.
  • the difference between this embodiment and the first embodiment lies in the specific structure of the resonant circuit in the resonant cavity 200. , the rest of the circuit structures are the same or similar.
  • the resonant circuit includes a first capacitor, a second capacitor, a first inductor, a second inductor and a third inductor. One ends of the first inductor and the second inductor are connected to the first capacitor and the second capacitor. One end of the first inductor is connected to one end of the third inductor and connected to the midpoint of a bridge arm in the three-phase bridge switch circuit.
  • the other ends of the second inductor and the second capacitor are connected to a transformer.
  • the primary winding, and the other end of the second inductor is connected to the other end of the third inductor, and the other ends of the first capacitors in the three resonant circuits are connected to each other to form a Y-shaped connection.
  • the resonant cavity 200 includes a first resonant circuit, a second resonant circuit and a third resonant circuit.
  • the first resonant circuit includes a first capacitor C1, a second capacitor C2, a first inductor L1, the second inductor L2 and the third inductor L3.
  • the second resonant circuit includes a first capacitor C3, a second capacitor C4, a first inductor L4, a second inductor L5 and a third inductor L6.
  • the third resonant circuit includes a A capacitor C5, a second capacitor C6, a first inductor L7, a second inductor L8 and a third inductor L9.
  • the third inductor L3, the third inductor L6 and the third inductor L9 One end of the third inductor L3, the third inductor L6 and the third inductor L9 respectively connects to the midpoint of the three bridge arms of the three-phase bridge switch circuit 100, and the other ends of the third inductor L3, the third inductor L6 and the third inductor L9 respectively connect to the first transformer T1, The same terminals of the primary windings of the second transformer T2 and the third transformer T3, the second capacitor C2, the second capacitor C4 and the second capacitor C6 are respectively connected to the same terminals of the primary windings of the first transformer T1, the second transformer T2 and the third transformer T3.
  • This embodiment can also effectively increase the input and output voltage range of the converter 10 to achieve a wide voltage range input and output, and when using switching frequency modulation control, a wide voltage range output can be achieved without wide frequency control, that is, the switching control frequency can be compressed and narrowed. ,Improve efficiency.
  • Figure 4 is a circuit schematic diagram of the fourth embodiment of the three-phase interleaved wide range high-efficiency isolated bidirectional converter 10 of the present application.
  • the difference between this embodiment and the first embodiment lies in the specific structure of the resonant circuit in the resonant cavity 200. , the rest of the circuit structures are the same or similar.
  • the resonant circuit includes a first capacitor, a second capacitor, a first inductor, a second inductor and a third inductor. One end of the first inductor is connected to one end of the first capacitor and the third inductor.
  • One end of the second inductor is connected to the other end of the third inductor and one end of the second capacitor, the other end of the first capacitor is connected to the midpoint of a bridge arm in the three-phase bridge switch circuit, the second inductor and the second The other end of the capacitor is connected to the primary winding of a transformer, and the other end of the second inductor is connected to the other end of the first inductor.
  • the resonant cavity 200 includes a first resonant circuit, a second resonant circuit and a third resonant circuit.
  • the first resonant circuit includes a first capacitor C1, a second capacitor C2, a first inductor L1, the second inductor L2 and the third inductor L3.
  • the second resonant circuit includes a first capacitor C3, a second capacitor C4, a first inductor L4, a second inductor L5 and a third inductor L6.
  • the third resonant circuit includes a A capacitor C5, a second capacitor C6, a first inductor L7, a second inductor L8 and a third inductor L9.
  • the first capacitor C1, the first capacitor C3 and the first capacitor C5 The second capacitor C2, the second capacitor C4, and the second capacitor C6 are respectively connected to the midpoints of the three bridge arms of the three-phase bridge switch circuit 100, and the second capacitor C2, the second capacitor C4, and the second capacitor C6 are respectively connected to the first transformer T1, the second transformer T2, and the second transformer T2.
  • the same-name terminal of the primary winding of the third transformer T3, the second inductor L2, the second inductor L5 and the second inductor L8 are respectively connected to the different-name terminals of the primary windings of the first transformer T1, the second transformer T2 and the third transformer T3, And the opposite ends of the primary winding and the secondary winding of the first transformer T1, the second transformer T2 and the third transformer T3 are respectively connected to each other to form a Y-shaped connection.
  • each circuit in the three-phase interleaved wide-range high-efficiency isolated bidirectional converter of the present application adopts three-phase interleaved technology to reduce ripples, and the equivalent circuit of the resonant circuit in the forward and reverse flow of energy is multi-element.
  • the resonant circuit realizes soft switching during forward and reverse operation, and the loss is small, which solves the problem that the traditional LLC resonant circuit cannot work with the same performance in the reverse direction, that is, the three-phase interleaved wide range high-efficiency isolation bidirectional converter of the present application flows in the reverse direction of energy.
  • the voltage can be boosted at any time, which can effectively increase the input and output voltage range of the converter and achieve a wide voltage range output.
  • the gain is the same when the energy flows forward and reverse.
  • the structural design of the resonant circuit of this application does not require switching frequency modulation control. Broadband control can achieve wide voltage range output, that is, the switching control frequency can be compressed and narrowed to improve efficiency.

Landscapes

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

Abstract

La présente demande concerne un convertisseur bidirectionnel à isolation efficace à plage étendue à entrelacement triphasé, comprenant un circuit de commutation de type pont triphasé, une cavité résonante, trois transformateurs et un circuit de redressement de type pont triphasé. La cavité résonante comprend trois circuits résonants, et chaque circuit résonant comprend un premier condensateur, un deuxième condensateur, un troisième condensateur, un premier inducteur, un deuxième inducteur et un troisième inducteur. Une extrémité du premier inducteur est connectée à une extrémité du deuxième inducteur, une extrémité du premier condensateur et une extrémité du troisième condensateur, et les autres extrémités du premier inducteur et du premier condensateur sont respectivement connectées à une extrémité du troisième inducteur et à une extrémité du deuxième condensateur. Ladite extrémité du troisième inducteur est connectée au point médian d'un bras de pont dans le circuit de commutation de type pont triphasé, et les autres extrémités du deuxième inducteur et du troisième condensateur sont respectivement connectées aux autres extrémités du troisième inducteur et du deuxième condensateur et sont connectées à un enroulement primaire d'un transformateur. Dans les trois circuits résonants, les extrémités des deuxièmes condensateurs connectés aux premiers condensateurs sont couplées les unes aux autres pour former un couplage en étoile. Les enroulements secondaires des trois transformateurs sont respectivement connectés aux points médians des trois bras de pont du circuit de redressement de type pont triphasé.
PCT/CN2023/104672 2022-09-09 2023-06-30 Convertisseur bidirectionnel à isolation efficace à plage étendue à entrelacement triphasé WO2024051317A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN202211104680.2 2022-09-09
CN202211104680.2A CN115580150A (zh) 2022-09-09 2022-09-09 一种三相交错宽范围高效隔离双向变换器

Publications (1)

Publication Number Publication Date
WO2024051317A1 true WO2024051317A1 (fr) 2024-03-14

Family

ID=84580276

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2023/104672 WO2024051317A1 (fr) 2022-09-09 2023-06-30 Convertisseur bidirectionnel à isolation efficace à plage étendue à entrelacement triphasé

Country Status (2)

Country Link
CN (1) CN115580150A (fr)
WO (1) WO2024051317A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115580150A (zh) * 2022-09-09 2023-01-06 深圳深源技术能源有限公司 一种三相交错宽范围高效隔离双向变换器

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090303753A1 (en) * 2008-06-10 2009-12-10 Dianbo Fu Multi-Element Resonant Converters
CN105024551A (zh) * 2014-04-16 2015-11-04 艾默生网络能源有限公司 一种谐振电路、充电器及不间断电源
CN109217681A (zh) * 2018-11-26 2019-01-15 燕山大学 一种双向谐振变换器
CN109560711A (zh) * 2019-01-22 2019-04-02 山东大学 一种隔离型双向dc-dc变换器及其调制方法
CN212343653U (zh) * 2020-02-27 2021-01-12 西安图为软件科技有限公司 一种谐振电路及双向谐振电路变换器
CN114157150A (zh) * 2021-10-27 2022-03-08 深圳市崧盛电子股份有限公司 一种高增益的双向y源-llc隔离直流-直流变换器
CN114884365A (zh) * 2022-05-18 2022-08-09 深圳深源技术能源有限公司 一种三相变换器
CN114900048A (zh) * 2022-05-18 2022-08-12 深圳深源技术能源有限公司 一种三相双向dc-dc变换器
CN115580150A (zh) * 2022-09-09 2023-01-06 深圳深源技术能源有限公司 一种三相交错宽范围高效隔离双向变换器
CN218549757U (zh) * 2022-09-09 2023-02-28 深圳深源技术能源有限公司 一种三相交错宽范围高效隔离双向变换器

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090303753A1 (en) * 2008-06-10 2009-12-10 Dianbo Fu Multi-Element Resonant Converters
CN105024551A (zh) * 2014-04-16 2015-11-04 艾默生网络能源有限公司 一种谐振电路、充电器及不间断电源
CN109217681A (zh) * 2018-11-26 2019-01-15 燕山大学 一种双向谐振变换器
CN109560711A (zh) * 2019-01-22 2019-04-02 山东大学 一种隔离型双向dc-dc变换器及其调制方法
CN212343653U (zh) * 2020-02-27 2021-01-12 西安图为软件科技有限公司 一种谐振电路及双向谐振电路变换器
CN114157150A (zh) * 2021-10-27 2022-03-08 深圳市崧盛电子股份有限公司 一种高增益的双向y源-llc隔离直流-直流变换器
CN114884365A (zh) * 2022-05-18 2022-08-09 深圳深源技术能源有限公司 一种三相变换器
CN114900048A (zh) * 2022-05-18 2022-08-12 深圳深源技术能源有限公司 一种三相双向dc-dc变换器
CN115580150A (zh) * 2022-09-09 2023-01-06 深圳深源技术能源有限公司 一种三相交错宽范围高效隔离双向变换器
CN218549757U (zh) * 2022-09-09 2023-02-28 深圳深源技术能源有限公司 一种三相交错宽范围高效隔离双向变换器

Also Published As

Publication number Publication date
CN115580150A (zh) 2023-01-06

Similar Documents

Publication Publication Date Title
US10637363B2 (en) Converters with hold-up operation
US8891261B2 (en) Three-phase three-level soft-switched PFC rectifiers
CN109039121B (zh) 一种高频隔离型交直流变换电路及其控制方法
CN112688572B (zh) 一种双向dc-dc变换器
US11296607B2 (en) DC-DC converter
WO2024146314A1 (fr) Procédé de commande de convertisseur de courant continu résonant llc bidirectionnel apte à obtenir une stabilisation de tension à large plage
JP3344356B2 (ja) スイッチング電源装置
WO2024051320A1 (fr) Convertisseur bidirectionnel isolé efficace à large bande
US11848604B2 (en) Single-stage AC-DC converter circuit with power factor correction function
KR20180004675A (ko) 보조 lc 공진 회로를 갖는 양방향 컨버터 및 그 구동 방법
CN113162431B (zh) 一种高效双向变换器
CN112688573A (zh) 一种高频隔离双向变换器
CN112688571A (zh) 一种双向变换器
WO2024051317A1 (fr) Convertisseur bidirectionnel à isolation efficace à plage étendue à entrelacement triphasé
CN114884365A (zh) 一种三相变换器
CN113765358B (zh) 单级交错并联ac-dc谐振变换电路及其控制方法
CN214045456U (zh) 一种高频隔离双向dc-dc变换器
CN107171563B (zh) 紧调整输出的组合变流器
CN103782499A (zh) 具有正弦波变压器电压的隔离开关模式dc/dc转换器
CN218549757U (zh) 一种三相交错宽范围高效隔离双向变换器
CN112350583A (zh) 一种电流型推挽桥式软开关双向直流变换器
CN115664225B (zh) 一种有源钳位隔离双向谐振型变换器及其调制方法
CN115459605A (zh) 一种三相dc-dc变换器
CN208046459U (zh) 一种燃料电池的dc-dc变换器
CN114900048A (zh) 一种三相双向dc-dc变换器

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 23862018

Country of ref document: EP

Kind code of ref document: A1