WO2022077262A1 - Circuit résonant bidirectionnel et automobile - Google Patents

Circuit résonant bidirectionnel et automobile Download PDF

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Publication number
WO2022077262A1
WO2022077262A1 PCT/CN2020/120880 CN2020120880W WO2022077262A1 WO 2022077262 A1 WO2022077262 A1 WO 2022077262A1 CN 2020120880 W CN2020120880 W CN 2020120880W WO 2022077262 A1 WO2022077262 A1 WO 2022077262A1
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WO
WIPO (PCT)
Prior art keywords
controllable switch
switch tube
bridge circuit
turned
tube
Prior art date
Application number
PCT/CN2020/120880
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English (en)
Chinese (zh)
Inventor
陈晓斌
张辉
宋安国
吴壬华
Original Assignee
深圳欣锐科技股份有限公司
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 深圳欣锐科技股份有限公司 filed Critical 深圳欣锐科技股份有限公司
Priority to PCT/CN2020/120880 priority Critical patent/WO2022077262A1/fr
Priority to CN202080011980.9A priority patent/CN113424426B/zh
Publication of WO2022077262A1 publication Critical patent/WO2022077262A1/fr

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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
    • H02M3/3353—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
    • H02M1/00—Details of apparatus for conversion
    • H02M1/08—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters
    • H02M1/088—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters for the simultaneous control of series or parallel connected semiconductor devices
    • 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
    • H02M7/53—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 using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M7/537—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 using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters
    • H02M7/5387—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 using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a bridge configuration
    • H02M7/53871—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 using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a bridge configuration with automatic control of output voltage or current
    • 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
    • H02M7/53—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 using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M7/537—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 using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters
    • H02M7/539—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 using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters with automatic control of output wave form or frequency
    • H02M7/5395—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 using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters with automatic control of output wave form or frequency by pulse-width modulation
    • 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

  • the present application relates to the field of electrical technology, and in particular, to a bidirectional resonant circuit and an automobile.
  • DC-DC converters direct current-direct current converters
  • bidirectional DC-DC converters When the bidirectional DC-DC converter works in the forward direction, it can convert the electricity of the high-voltage battery into low-voltage direct current, and charge the high-voltage direct current to the low-voltage battery; when the bidirectional DC-DC converter works in the reverse direction, it can convert the electricity of the low-voltage battery into high voltage Direct current to charge the low voltage direct current to the high voltage battery.
  • the purpose of the present application is to provide a bidirectional resonant circuit and an automobile, so as to solve the above problems, and to improve the voltage range of reverse operation without adding components on the secondary side.
  • a first aspect of the present application provides a bidirectional resonant circuit, including a first bridge circuit, a transformer, a resonant circuit, and a second bridge circuit; the first bridge circuit is connected to a secondary winding of the transformer, and the resonant circuit is connected to the secondary winding of the transformer.
  • One end of the circuit is connected to the primary winding of the transformer, and the other end of the resonant circuit is connected to the second bridge circuit; when the bidirectional resonant circuit is in a reverse working state, within a set period, the The controllable switch tube of the first bridge circuit is turned on with a fixed duty cycle, and the controllable switch tube of the second bridge circuit is turned on with an adjustable duty cycle; the first bridge circuit is used to connect the low voltage The direct current is converted into alternating current and transmitted to the transformer; the transformer is used to transmit the alternating current to the resonant circuit in the form of an alternating magnetic field; the resonant circuit is used to resonate the alternating current, and transmit the resonated alternating current to the resonant circuit. the second bridge circuit; the second bridge circuit is used to rectify the alternating current into high voltage direct current.
  • the above bidirectional resonant circuit wherein the first bridge circuit includes a half-bridge circuit, and the half-bridge circuit includes a first controllable switch tube and a second controllable switch tube; the first controllable switch tube and the second controllable switch tube complementarily conduct with the fixed duty cycle;
  • the second bridge circuit includes a first full-bridge circuit
  • the first full-bridge circuit includes a third controllable switch, a fourth controllable switch, a fifth controllable switch and a sixth controllable switch
  • the third controllable switch tube and the fourth controllable switch tube are located in the same half bridge, and the fifth controllable switch tube and the sixth controllable switch tube are located in the same half bridge;
  • the third controllable switch tube and the fifth controllable switch tube start conduction after a set period of time; during the conduction period of the second controllable switch tube , the third controllable switch tube and the fifth controllable switch tube are synchronously turned on after a delay of a set time period; the fourth controllable switch tube and the sixth controllable switch tube are not turned on.
  • the first bridge circuit includes a half-bridge circuit
  • the half-bridge circuit includes a first controllable switch tube and a second controllable switch tube
  • the first controllable switch tube and the second controllable switch in complementary conduction with the fixed duty cycle
  • the second bridge circuit includes a first full-bridge circuit
  • the first full-bridge circuit includes a third controllable switch, a third Four controllable switch transistors, fifth controllable switch transistor and sixth controllable switch transistor
  • the third controllable switch transistor and the fourth controllable switch transistor are located in the same half bridge
  • the fifth controllable switch transistor and the sixth controllable switch tube are located in the same half-bridge
  • the third controllable switch tube and the fifth controllable switch tube are set later
  • the time period starts to conduct; in the conduction period of the second controllable switch tube, the fourth controllable switch tube and the sixth controllable switch tube are synchronously turned on after a delay of a
  • the switch tube and the tenth controllable switch tube; the seventh controllable switch tube and the eighth controllable switch tube are located in the same half bridge, and the ninth controllable switch tube and the tenth controllable switch tube are located at The same half-bridge;
  • the seventh controllable switch and the eighth controllable switch are complementarily turned on at a fixed duty ratio, and the ninth controllable switch and the tenth controllable switch are at a fixed duty
  • the duty ratio is complementarily turned on; the seventh controllable switch tube and the tenth controllable switch tube are turned on synchronously, and the eighth controllable switch tube and the ninth controllable switch tube are turned on synchronously;
  • the second bridge circuit includes a first full-bridge circuit, and the first full-bridge
  • the switch tube and the tenth controllable switch tube; the seventh controllable switch tube and the eighth controllable switch tube are located in the same half bridge, and the ninth controllable switch tube and the tenth controllable switch tube are located at The same half-bridge;
  • the seventh controllable switch and the eighth controllable switch are complementarily turned on at a fixed duty ratio, and the ninth controllable switch and the tenth controllable switch are at a fixed duty
  • the duty ratio is complementarily turned on; the seventh controllable switch tube and the tenth controllable switch tube are turned on synchronously, and the eighth controllable switch tube and the ninth controllable switch tube are turned on synchronously;
  • the second bridge circuit includes a first full-bridge circuit, and the first full-bridge
  • the bidirectional resonant circuit as described above wherein the resonant circuit includes an inductor and a capacitor, the first end of the capacitor is connected to the first end of the primary winding of the transformer, and the second end of the capacitor is connected to the first end node connection; the first connection node is located between the third controllable switch tube and the fourth controllable switch tube; the first end of the inductor is connected to the second end of the primary winding of the transformer, The second end of the inductor is connected to a second connection node; the second connection node is located between the fifth controllable switch tube and the sixth controllable switch tube.
  • the bidirectional resonant circuit as described above, wherein, when the bidirectional resonant circuit is in a forward working state, within a set period, the controllable switch tube of the second bridge circuit uses the The fixed duty cycle is turned on, and the controllable switch tube of the first bridge circuit is not turned on; the second bridge circuit is used to invert high-voltage direct current into alternating current and transmit it to the resonant circuit; the resonant circuit used to resonate the alternating current, and transmit the resonated alternating current to the transformer; the transformer is used to transmit the alternating current to the first bridge circuit in the form of an alternating magnetic field; the first bridge circuit is used for Rectify alternating current to low voltage direct current.
  • a second aspect of the present application provides an automobile, including an on-board power supply system, wherein the on-board power supply system includes the bidirectional resonant circuit described in any one of the first aspect of the present application.
  • the controllable switch tube of the second bridge circuit connected to the high-voltage battery is controlled to conduct conduction. to increase the voltage range during reverse operation.
  • the number of components of the product is reduced, so the volume of the product is reduced, correspondingly, the cost is reduced, and the loss of the circuit itself is also reduced.
  • FIG. 1 is a circuit diagram of a bidirectional resonant circuit provided by an embodiment of the present application.
  • FIG. 2 is a schematic diagram of a periodic signal of a bidirectional resonant circuit working in the forward direction provided by an embodiment of the present application;
  • FIG. 3 is a schematic diagram of a periodic signal when a bidirectional resonant circuit provided in an embodiment of the present application works in reverse;
  • FIG. 4 is a schematic diagram of another periodic signal when a bidirectional resonant circuit according to an embodiment of the present application works in reverse;
  • FIG. 5 is a circuit diagram of another bidirectional resonant circuit provided by an embodiment of the present application.
  • FIG. 6 is a schematic diagram of a periodic signal of another bidirectional resonant circuit operating in the forward direction provided by an embodiment of the present application;
  • FIG. 7 is a schematic diagram of a periodic signal when another bidirectional resonant circuit provided in an embodiment of the present application works in reverse;
  • FIG. 8 is a schematic diagram of another periodic signal when another bidirectional resonant circuit according to an embodiment of the present application works in reverse.
  • the bidirectional resonant circuit provided by the embodiments of the present application includes a first bridge circuit, a transformer, a resonant circuit, and a second bridge circuit; the first bridge circuit is connected to the secondary winding of the transformer, and the resonant circuit is One end is connected to the primary winding of the transformer, and the other end of the resonant circuit is connected to the second bridge circuit.
  • the controllable switch tube of the first bridge circuit is turned on with a fixed duty cycle, and the controllable switch of the second bridge circuit is turned on.
  • the tube is turned on with an adjustable duty cycle.
  • the first bridge circuit is used to invert low-voltage direct current into alternating current and transmit it to the transformer; the transformer is used to transmit the alternating current to the resonant circuit in the form of an alternating magnetic field; the resonant circuit is used to convert the alternating current. Resonance is performed, and the resonated alternating current is transmitted to the second bridge circuit; the second bridge circuit is used to rectify the alternating current into high-voltage direct current.
  • the controllable switch tube involved in the present application may be a metal-oxide-semiconductor (metal-oxide-semiconductor, MOS) field effect transistor.
  • MOS metal-oxide-semiconductor
  • the first bridge circuit is connected to a low-voltage DC power supply
  • the second bridge circuit is connected to a high-voltage DC power supply or a device requiring high-voltage power supply.
  • the second bridge circuit is connected to the high-voltage DC power supply.
  • the low-voltage DC power supply illustrated in FIG. 1 is a rechargeable low-voltage battery
  • the high-voltage DC power supply illustrated in FIG. 1 is a rechargeable high-voltage battery.
  • the controllable switch tube of the second bridge circuit connected to the high-voltage battery is controlled to be turned on.
  • the controllable switch tube of the second bridge circuit is turned on, the second bridge circuit forms a short circuit, and the second bridge circuit has a large current at this time.
  • the above-mentioned large current can be supplied to devices that require high-voltage power supply, thereby increasing the voltage range during reverse operation.
  • the number of components of the product is reduced, so the volume of the product is reduced, correspondingly, the cost is reduced, and the loss of the circuit itself is also reduced.
  • the fixed duty cycle in this embodiment may be 0.5
  • the adjustable duty cycle range is: 0 ⁇ adjustable duty cycle ⁇ 0.5.
  • the above-mentioned resonant circuit includes an inductance and a capacitance
  • the setting period of the bidirectional resonant circuit is determined according to the inductance and capacitance.
  • the set period of the bidirectional resonant circuit is calculated according to the following formula:
  • Ts is the set period
  • L1 is the inductance of the inductor
  • C1 is the capacitance of the capacitor.
  • composition of the bidirectional resonant circuit in this embodiment will be described below.
  • the composition of the bidirectional resonant circuit has two specific implementations, one of which is that the first bridge circuit is a half-bridge circuit (as shown in FIG. 1 ), The second bridge circuit is a full bridge circuit; the other is that the first bridge circuit and the second bridge circuit are both full bridge circuits (as shown in Figure 5), as detailed below:
  • the bidirectional resonant circuit includes a low-voltage battery, a first bridge circuit, a transformer T, a resonant circuit, a second bridge circuit and a high-voltage battery.
  • the first bridge circuit is a half bridge circuit
  • the second bridge circuit is a first full bridge circuit.
  • the half-bridge circuit includes a first controllable switch S1 and a second controllable switch S2.
  • the transformer T includes a primary winding and a secondary winding.
  • the resonant circuit includes a capacitor C and an inductor L.
  • the first full-bridge circuit includes a third controllable switch S3, a fourth controllable switch S4, a fifth controllable switch S5 and a sixth controllable switch S6; the third controllable switch S3 and The fourth controllable switch S4 is located in the same half bridge, and the fifth controllable switch S5 and the sixth controllable switch S6 are located in the same half bridge.
  • One end of the first controllable switch tube S1 is connected to the negative electrode of the low-voltage battery, the other end of the first controllable switch tube S1 is connected to one end of the primary winding; the other end of the primary winding is connected to one end of the second controllable switch tube S2, The other end of the second controllable switch tube S2 is connected to the negative electrode of the low-voltage battery; the middle part of the primary winding is connected to the positive electrode of the low-voltage battery.
  • One end of the capacitor C is connected to one end of the primary winding, and the other end of the primary winding is connected to one end of the inductor L.
  • the other end of the capacitor C is connected to the first connection node, and the other end of the inductor L is connected to the second connection node.
  • the first connection node is set between the third controllable switch tube S3 and the fourth controllable switch tube S4, and the second connection node is set between the fifth controllable switch tube S5 and the sixth controllable switch tube S6.
  • the third controllable switch S3 and the fourth controllable switch S4 form a half bridge.
  • the third controllable switch S3 is connected to the positive pole of the high-voltage battery, and the fourth controllable switch S4 is connected to the positive pole of the high-voltage battery. Negative connection.
  • the fifth controllable switch tube S5 and the sixth controllable switch tube S6 form a half bridge. In the half bridge, the fifth controllable switch tube S5 is connected to the positive pole of the high-voltage battery, and the sixth controllable switch tube S6 is connected to the positive pole of the high-voltage battery. Negative connection.
  • the second bridge circuit When working in the forward direction, the second bridge circuit is used to convert the high-voltage direct current provided by the high-voltage battery into alternating current and transmit it to the resonant circuit; the resonant circuit is used to resonate the alternating current and transmit the resonated alternating current.
  • the transformer T the transformer T is used to transmit alternating current to the first bridge circuit in the form of an alternating magnetic field; the first bridge circuit is used to rectify the alternating current into low-voltage direct current.
  • controllable switch tube of the first bridge circuit is not turned on, and the controllable switch tube of the second bridge circuit is turned on according to a fixed duty cycle.
  • first controllable switch S1 and the second controllable switch S2 are non-conductive.
  • the third controllable switch S3 and the fourth controllable switch S4 are complementarily turned on with a duty cycle of 0.5, and the fifth controllable switch S5 and the sixth controllable switch S6 are complementarily turned on with a duty cycle of 0.5;
  • the three controllable switch tubes S3 and the sixth controllable switch S6 are turned on synchronously, and the fourth controllable switch tube S4 and the fifth controllable switch tube S5 are turned on synchronously.
  • the high-voltage direct current of the high-voltage battery can be converted into low-voltage direct current to supply the low-voltage battery, so as to achieve the effect of charging the low-voltage battery, so that the low-voltage battery can provide low-voltage direct current to other devices to ensure the normal operation of other devices.
  • the bidirectional resonant circuit can also operate in the reverse direction.
  • the working flow of the reverse operation is described below: the first bridge circuit is used to invert low-voltage direct current into alternating current and transmit it to the transformer T; the transformer T is used to transmit alternating current to the resonant circuit in the form of an alternating magnetic field; the resonant circuit is used to resonate the alternating current, and transmit the resonated alternating current to the second bridge circuit; the second bridge circuit The circuit is used to rectify alternating current to high voltage direct current.
  • controllable switch tube of the first bridge circuit is turned on with a fixed duty cycle of 0.5, and the controllable switch tube of the second bridge circuit is turned on with an adjustable duty cycle.
  • the first controllable switch S1 and the second controllable switch S2 are complementarily turned on according to a fixed duty ratio of 0.5. That is, within a set period TS, the first controllable switch S1 is turned on first for the first set period T1 for Ts/2, and the rest of Ts/2 are turned off; the second controllable switch S2 is first turned off for Ts/2, and then The first set period T1 is turned on again.
  • the second controllable switch S2 is turned off first for a duration of Ts/2 , the rest of the Ts/2 duration is turned on.
  • the third controllable switch tube S3 and the fifth controllable switch tube S5 start to be turned on after a delay of T3; After the third controllable switch tube S3 and the fifth controllable switch tube S5 are turned on for the second set period T2, the duration of T3 is turned off.
  • the third controllable switch tube S3 and the fifth controllable switch tube S5 start to be turned on after a delay of T3 time.
  • the duration of T3 is turned off.
  • the fourth controllable switch S4 and the sixth controllable switch S6 are not conducting.
  • D is the duty ratio of the third controllable switch tube S3 and the fifth controllable switch tube S5, and the range of the duty ratio is: 0 ⁇ D ⁇ 0.5.
  • T3 is the turn-on delay time of the third controllable switch S3 and the fifth controllable switch S5
  • T2 is the turn-on time of the third controllable switch S3 and the fifth controllable switch S5 .
  • the third controllable switch tube S3 and the fifth controllable switch tube S5 start to be turned on after the first controllable switch tube S1 is turned on after a delay of T3, and the second controllable switch tube S2 is turned on. Start to delay T3 time and then start conducting.
  • the first control method for the case where the first bridge circuit is a half bridge circuit, no elements are added, and the third controllable switch S3 and the fifth controllable switch S5 are controlled to be turned on, thereby increasing the reverse operation time. voltage range, thus providing a wider voltage range for high-voltage batteries.
  • the fourth controllable switch S4 and the sixth controllable switch S6 can be controlled, respectively, according to the third controllable switch.
  • the conduction mode of the tube S3 and the fifth controllable switch tube S5 is conducted to ensure that the circuit can continue to be used normally.
  • the use of the fourth controllable switch tube S4 and the sixth controllable switch tube S6 as backup controllable switch tubes can avoid the occurrence of danger.
  • the first controllable switch S1 and the second controllable switch S2 are complementarily turned on according to a duty ratio of 0.5. That is, within a set period TS, the first controllable switch S1 is turned on first for the first set period T1 for Ts/2, and the rest of Ts/2 are turned off; the second controllable switch S2 is first turned off for Ts/2, and then The first set period T1 is turned on again.
  • the third controllable switch S3 and the fifth controllable switch S5 are delayed by a set time period T3 Start conduction; in the conduction period of the second controllable switch S2, the fourth controllable switch S4 and the sixth controllable switch S6 are synchronously turned on after a delay of the set time period T3 .
  • the first controllable switch S1 is turned on for Ts/2 first, the rest of the Ts/2 are turned off; the second controllable switch S2 is turned off first after Ts/2 , the rest of the Ts/2 duration is turned on.
  • the third controllable switch tube S3 and the fifth controllable switch tube S5 start to be turned on after a delay of T3; After the third controllable switch tube S3 and the fifth controllable switch tube S5 are turned on for the second set period T2, the duration of T3 is turned off.
  • the fourth controllable switch tube S4 and the sixth controllable switch tube S6 start to be turned on after a delay of T3 time. After the fourth controllable switch tube S4 and the sixth controllable switch tube S6 are turned on for the second set period T2, the duration of T3 is turned off.
  • D is the duty ratio of the third controllable switch tube S3 and the fifth controllable switch tube S5, and the range of the duty ratio is: 0 ⁇ D ⁇ 0.5.
  • T3 is the turn-on delay time of the third controllable switch S3 and the fifth controllable switch S5
  • T2 is the turn-on time of the third controllable switch S3 and the fifth controllable switch S5 .
  • D is also the duty ratio of the fourth controllable switch tube S4 and the sixth controllable switch tube S6, and the range of the duty ratio is: 0 ⁇ D ⁇ 0.5;
  • T3 is also the fourth controllable switch tube S4 and the sixth controllable switch tube S6.
  • the turn-on delay time of the sixth controllable switch tube S6, T2 is also the turn-on time length of the fourth controllable switch tube S4 and the sixth controllable switch tube S6.
  • the third controllable switch S3 and the fifth controllable switch S5 need to be turned on after the first controllable switch S1 starts to turn on after a delay of T3 time.
  • the fourth controllable switch S4 and the sixth controllable switch S6 need to be turned on after the second controllable switch S2 starts to be turned on after a delay of T3 time.
  • the bidirectional resonant circuit includes a low-voltage battery, a first bridge circuit, a transformer T, a resonant circuit, a second bridge circuit and a high-voltage battery.
  • the first bridge circuit is the second full bridge circuit
  • the second bridge circuit is the first full bridge circuit.
  • the second bridge circuit in FIG. 5 is the same as the second bridge circuit in the first embodiment, and the difference lies in the first bridge circuit.
  • the second full-bridge circuit includes a seventh controllable switch S7, an eighth controllable switch S8, a ninth controllable switch S9, and a tenth controllable switch S10.
  • the transformer T includes a primary winding and a secondary winding.
  • the resonant circuit includes a capacitor C and an inductor L.
  • the first full-bridge circuit includes a third controllable switch S3, a fourth controllable switch S4, a fifth controllable switch S5 and a sixth controllable switch S6; the seventh controllable switch S7 and The eighth controllable switch S8 is located in the same half bridge.
  • the seventh controllable switch S7 is connected to the positive electrode of the low-voltage battery, and the eighth controllable switch S8 is connected to the negative electrode of the low-voltage battery.
  • the ninth controllable switch S9 and the tenth controllable switch S10 are located in the same half bridge. In the half bridge, the ninth controllable switch S9 is connected to the positive electrode of the low-voltage battery, and the tenth controllable switch S10 Connect to the negative terminal of the low voltage battery.
  • One end of the primary winding is connected to the third connection node, and the other end of the primary winding is connected to the fourth connection node;
  • the third connection node is located between the seventh controllable switch S7 and the eighth controllable switch S8, and the fourth connection node It is located between the ninth controllable switch tube S9 and the tenth controllable switch tube S10.
  • the resonant circuit includes a capacitor C and an inductor L, one end of the capacitor C is connected to one end of the primary winding, and the other end of the primary winding is connected to one end of the inductor L.
  • the other end of the capacitor C is connected to the first connection node, and the other end of the inductor L is connected to the second connection node.
  • the first connection node is set between the third controllable switch tube S3 and the fourth controllable switch tube S4, and the second connection node is set between the fifth controllable switch tube S5 and the sixth controllable switch tube S6.
  • the third controllable switch S3 and the fourth controllable switch S4 form a half bridge.
  • the third controllable switch S3 is connected to the positive pole of the high-voltage battery, and the fourth controllable switch S4 is connected to the positive pole of the high-voltage battery. Negative connection.
  • the fifth controllable switch tube S5 and the sixth controllable switch tube S6 form a half bridge. In the half bridge, the fifth controllable switch tube S5 is connected to the positive pole of the high-voltage battery, and the sixth controllable switch tube S6 is connected to the positive pole of the high-voltage battery. negative connection.
  • the second bridge circuit When working in the forward direction, the second bridge circuit is used to convert the high-voltage direct current provided by the high-voltage battery into alternating current and transmit it to the resonant circuit; the resonant circuit is used to resonate the alternating current and transmit the resonated alternating current.
  • the transformer T the transformer T is used to transmit alternating current to the first bridge circuit in the form of an alternating magnetic field; the first bridge circuit is used to rectify the alternating current into low-voltage direct current.
  • the controllable switch of the first bridge circuit is not turned on, and the controllable switch of the second bridge circuit is turned on according to a fixed duty cycle.
  • the seventh controllable switch S7 to the tenth controllable switch S10 are not conducting.
  • the third controllable switch S3 and the fourth controllable switch S4 are complementarily turned on with a duty cycle of 0.5, and the fifth controllable switch S5 and the sixth controllable switch S6 are complementarily turned on with a duty cycle of 0.5;
  • the three controllable switches S3 and the sixth controllable switch S6 are turned on synchronously, and the fourth controllable switch S4 and the fifth controllable switch S5 are turned on synchronously.
  • the high-voltage direct current of the high-voltage battery can be converted into low-voltage direct current to supply the low-voltage battery, so as to achieve the effect of charging the low-voltage battery, so that the low-voltage battery can provide low-voltage direct current to other devices to ensure the normal operation of other devices.
  • the bidirectional resonant circuit can also operate in the reverse direction.
  • the working flow of the reverse operation is described below: the first bridge circuit is used to invert low-voltage direct current into alternating current and transmit it to the transformer T; the transformer T is used to transmit alternating current to the resonant circuit in the form of an alternating magnetic field; the resonant circuit is used to resonate the alternating current, and transmit the resonated alternating current to the second bridge circuit; the second bridge circuit The circuit is used to rectify alternating current to high voltage direct current.
  • controllable switch tube of the first bridge circuit is turned on with a fixed duty cycle of 0.5, and the controllable switch tube of the second bridge circuit is turned on with an adjustable duty cycle.
  • the seventh controllable switch S7 and the eighth controllable switch are complementarily turned on according to a fixed duty cycle of 0.5; the ninth controllable switch S9 and the tenth
  • the controllable switch tube S10 is complementarily turned on according to a fixed duty cycle of 0.5.
  • the seventh controllable switch S7 and the tenth controllable switch S10 are synchronously turned on, and the eighth controllable switch S8 and the ninth controllable switch S9 are synchronously turned on.
  • controllable switch transistor S7 the seventh controllable switch transistor S7 and the eighth controllable switch transistor are used as reference for description.
  • the seventh controllable switch S7 is turned on for Ts/2 first, the remaining Ts/2 are turned off; after the eighth controllable switch is first turned off for Ts/2, The remaining Ts/2 durations are turned on.
  • the third controllable switch S3 and the fifth controllable switch S5 start to be turned on after a delay of T3; After the third controllable switch tube S3 and the fifth controllable switch tube S5 are turned on for the second set period T2, the duration of T3 is turned off.
  • the third controllable switch tube S3 and the fifth controllable switch tube S5 start to be turned on after a delay of T3, and the third controllable switch tube S3 and the fifth controllable switch tube After the control switch S3 and the fifth controllable switch S5 are turned on for the second set period T2, the time period T3 is turned off. During the whole process, the fourth controllable switch S4 and the sixth controllable switch S6 are not conducting.
  • D is the duty ratio of the third controllable switch tube S3 and the fifth controllable switch tube S5, and the range of the duty ratio is: 0 ⁇ D ⁇ 0.5.
  • T3 is the turn-on delay time of the third controllable switch S3 and the fifth controllable switch S5, and T2 is the turn-on time of the third controllable switch S3 and the fifth controllable switch S5.
  • the third controllable switch S3 and the fifth controllable switch S5 are turned on twice, and the seventh controllable switch S7 is turned on once after the turn-on time of T3, and After the turn-on of the eighth controllable switch tube starts to be turned on once after a time length of T3.
  • the first control method for the case where the first bridge circuit is a full bridge circuit, no elements are added, and the third controllable switch S3 and the fifth controllable switch S5 are controlled to be turned on, thereby increasing the reverse operation time. voltage range, thus providing a wider voltage range for high-voltage batteries. And in the case that the third controllable switch S3 or the fifth controllable switch S5 fails, the fourth controllable switch S4 and the sixth controllable switch S6 can be used. So as to avoid circuit failure during use, causing danger.
  • the seventh controllable switch S7 and the eighth controllable switch are complementarily turned on according to the duty cycle of 0.5; the ninth controllable switch and the tenth controllable switch are complementary.
  • the switch tube is turned on complementary according to the duty of 0.5.
  • the seventh controllable switch S7 and the tenth controllable switch are synchronously turned on, and the eighth controllable switch S8 and the ninth controllable switch are synchronously turned on.
  • controllable switch transistor S7 the seventh controllable switch transistor S7 and the eighth controllable switch transistor S8 are used as reference for description.
  • the third controllable switch tube and the fifth controllable switch tube start to be turned on after a set period of time;
  • the fourth controllable switch tube and the sixth controllable switch tube are synchronously turned on after a delay of a set period of time.
  • the seventh controllable switch S7 is turned on for Ts/2 first, the remaining Ts/2 are turned off; after the eighth controllable switch is first turned off for Ts/2, The remaining Ts/2 durations are turned on.
  • the third controllable switch S3 and the fifth controllable switch S5 start to be turned on after a delay of T3; After the third controllable switch tube S3 and the fifth controllable switch tube S5 are turned on for the second set period T2, the duration of T3 is turned off.
  • the fourth controllable switch S4 and the sixth controllable switch S6 start to be turned on after a delay of T3. After the fourth controllable switch tube S4 and the sixth controllable switch tube S6 are turned on for the second set period T2, the duration of T3 is turned off.
  • D is the duty ratio of the third controllable switch tube S3 and the fifth controllable switch tube S5, and the range of the duty ratio is: 0 ⁇ D ⁇ 0.5.
  • T3 is the turn-on delay time of the third controllable switch S3 and the fifth controllable switch S5, and T2 is the turn-on time of the third controllable switch S3 and the fifth controllable switch S5.
  • D is also the duty ratio of the fourth controllable switch tube S4 and the sixth controllable switch tube S6, and the range of the duty ratio is: 0 ⁇ D ⁇ 0.5;
  • T3 is also the fourth controllable switch tube S4 and the sixth controllable switch tube S6.
  • the turn-on delay time of the controllable switch tube S6, T2 is also the turn-on time length of the fourth controllable switch tube S4 and the sixth controllable switch tube S6.
  • the third controllable switch S3 and the fifth controllable switch S5 are turned on once, and it is necessary to delay the conduction of the seventh controllable switch S7 for a period of T3, and then start to turn on. Pass.
  • the fourth controllable switch tube S4 and the sixth controllable switch tube S6 are turned on once, and the turn-on of the tenth controllable switch tube S10 needs to be delayed for T3 time before the turn-on of the tenth controllable switch tube S10 starts.
  • the embodiment of the present application provides a bidirectional resonant circuit, which is connected to the first bridge circuit of the low-voltage battery, whether it is a half-bridge circuit or a full-bridge circuit, and can be connected to the high-voltage battery through control without adding other components.
  • the controllable switch tube of the second bridge circuit is turned on to increase the voltage range during reverse operation. The number of components of the product is reduced, so the volume of the product is reduced, correspondingly, the cost is reduced, and the loss of the circuit itself is also reduced.
  • controllable switches of the second bridge circuit may be turned on, or only part of them may be turned on. Therefore, the scope of use is also wider.
  • controllable switch tubes of the second bridge circuit may be part of the controllable switch tubes turned on, or all the controllable switches may be turned on. Tube conducts.
  • the control method in which some of the controllable switch tubes are turned on is adopted, the remaining controllable switch tubes can be used as spare parts to avoid danger.
  • the lifespan of all the controllable switches can be balanced, so as to prolong the lifespan of the product.
  • the resonant circuit includes an inductor L and a capacitor C, the first end of the capacitor C is connected to the first end of the primary winding of the transformer T, and the second end of the capacitor C is connected.
  • the terminal is connected to a first connection node; the first connection node is located between the third controllable switch tube S3 and the fourth controllable switch tube S4.
  • the first end of the inductor L is connected to the second end of the primary winding of the transformer T, and the second end of the inductor L is connected to the second connection node; the second connection node is located in the fifth controllable switch tube between S5 and the sixth controllable switch tube S6.
  • the embodiments of the present application also provide an automobile, including an on-board power supply system, and the on-board power supply system includes the bidirectional resonant circuit described in any of the embodiments of the present application.

Landscapes

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

Abstract

L'invention concerne un circuit résonant bidirectionnel et une automobile. Le circuit comprend un premier circuit en pont, un transformateur, un circuit résonant et un deuxième circuit en pont, le premier circuit en pont étant connecté à un enroulement secondaire du transformateur, une extrémité du circuit résonant est connectée à un enroulement primaire du transformateur, et l'autre extrémité du circuit résonant est connectée au deuxième circuit en pont. Lorsque le circuit résonant bidirectionnel est dans un état de fonctionnement inverse, dans une période définie, un tube de commutation pouvant être commandé du premier circuit en pont est mis sous tension avec un cycle de service fixe, et un tube de commutation pouvant être commandé du deuxième circuit en pont est mis sous tension avec un rapport cyclique réglable. Sans ajout de composants, dans l'état de fonctionnement inverse et sur la base de la commande de la mise en marche du premier circuit en pont, le tube de commutation pouvant être commandé, connecté à une batterie haute tension, du deuxième circuit en pont est commandé pour être mis sous tension, de manière à augmenter une plage de tension pendant l'opération inverse. Le nombre de composants d'un produit est réduit, de telle sorte que le volume de produit est réduit, et par conséquent, les coûts sont réduits, et la perte du circuit lui-même est également réduite.
PCT/CN2020/120880 2020-10-14 2020-10-14 Circuit résonant bidirectionnel et automobile WO2022077262A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PCT/CN2020/120880 WO2022077262A1 (fr) 2020-10-14 2020-10-14 Circuit résonant bidirectionnel et automobile
CN202080011980.9A CN113424426B (zh) 2020-10-14 2020-10-14 双向谐振电路和汽车

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2020/120880 WO2022077262A1 (fr) 2020-10-14 2020-10-14 Circuit résonant bidirectionnel et automobile

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WO2022077262A1 true WO2022077262A1 (fr) 2022-04-21

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CN109217681A (zh) * 2018-11-26 2019-01-15 燕山大学 一种双向谐振变换器
CN109412420A (zh) * 2018-11-08 2019-03-01 江苏固德威电源科技股份有限公司 双向隔离dc/dc电路及其采用的控制方法

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US20150349647A1 (en) * 2014-06-02 2015-12-03 Utah State University Multi-mode control for a dc-to-dc converter
CN106208710A (zh) * 2016-07-15 2016-12-07 江苏固德威电源科技股份有限公司 一种双向dc‑dc转换器及控制方法
CN107612337A (zh) * 2017-08-10 2018-01-19 上海交通大学 一种llc谐振变换器及其抑制循环能量的调制方法
CN109412420A (zh) * 2018-11-08 2019-03-01 江苏固德威电源科技股份有限公司 双向隔离dc/dc电路及其采用的控制方法
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