WO2018126554A1 - Circuit de conversion de tension d'onde de correction intelligente basé sur pfc, pont complet et demi-pont - Google Patents

Circuit de conversion de tension d'onde de correction intelligente basé sur pfc, pont complet et demi-pont Download PDF

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Publication number
WO2018126554A1
WO2018126554A1 PCT/CN2017/080980 CN2017080980W WO2018126554A1 WO 2018126554 A1 WO2018126554 A1 WO 2018126554A1 CN 2017080980 W CN2017080980 W CN 2017080980W WO 2018126554 A1 WO2018126554 A1 WO 2018126554A1
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Prior art keywords
unit
switching transistor
switch tube
pfc
full bridge
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PCT/CN2017/080980
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English (en)
Chinese (zh)
Inventor
廖志刚
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广东百事泰电子商务股份有限公司
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Publication of WO2018126554A1 publication Critical patent/WO2018126554A1/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
    • H02M3/33569—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements
    • H02M3/33573—Full-bridge at primary side of an isolation transformer
    • 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
    • H02M1/42—Circuits or arrangements for compensating for or adjusting power factor in converters or inverters
    • H02M1/4208—Arrangements for improving power factor of AC input
    • H02M1/4225—Arrangements for improving power factor of AC input using a non-isolated boost 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
    • H02M5/00—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases
    • H02M5/40—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc
    • H02M5/42—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters
    • H02M5/44—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac
    • H02M5/453—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M5/458—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/0067—Converter structures employing plural converter units, other than for parallel operation of the units on a single load
    • 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
    • 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
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P80/00—Climate change mitigation technologies for sector-wide applications
    • Y02P80/10—Efficient use of energy, e.g. using compressed air or pressurized fluid as energy carrier

Definitions

  • the invention relates to a voltage conversion circuit, in particular to an intelligent correction wave voltage conversion circuit based on PFC, full bridge and half bridge.
  • the intelligent buck-boost conversion device from AC to AC is also called a travel plug.
  • the voltage conversion circuit is a key circuit thereof, and is a circuit capable of realizing AC-AC conversion, which can be AC-AC conversion realizes the function of buck-boost and stabilizes voltage and frequency.
  • most of the current AC-AC portable device market is a non-isolated topology circuit with low PF value, low output voltage quality, and poor safety and reliability.
  • the technical problem to be solved by the present invention is to provide an intelligent correction based on PFC, full bridge and half bridge which can improve the PF value of the voltage conversion device, improve the output voltage quality, and is safe and reliable. Wave voltage conversion circuit.
  • the present invention adopts the following technical solutions.
  • An intelligent correction wave voltage conversion circuit based on PFC, full bridge and half bridge comprising: an input unit for providing a DC voltage; and a PFC boost unit connected to an output end of the input unit for The output voltage of the input unit is boosted and converted; a full bridge isolation conversion unit includes a first switch tube, a second switch tube, a sixth switch tube, a seventh switch tube, a transformer, a first diode, and a second a pole tube and a filter inductor, a drain of the sixth switch tube is connected to an output end of the PFC boost unit, a source of the sixth switch tube is connected to a first end of the transformer primary winding, and the second switch tube The drain is connected to the second end of the primary winding of the transformer, the source of the second switching transistor is connected to the front end, and the drain of the first switching transistor is connected to the output end of the PFC boosting unit, the first a source of the switch tube is connected to the second end of the primary winding of the transformer, a drain of the seventh switch tube is
  • the input unit comprises a socket, an insurance, a lightning protection resistor, a common mode suppression inductor, a safety capacitor and a rectifier bridge, wherein the fuse is connected to a neutral or a live line of the socket, and the common mode suppresses the inductance.
  • the front end is connected in parallel to the socket, the lightning protection resistor is connected in parallel to the front end of the common mode suppression inductor, and the input terminals of the safety capacitor and the rectifier bridge are both connected in parallel with the rear end of the common mode suppression inductor, and the output ends of the rectifier bridge are connected in parallel Filter capacitor.
  • the PFC boosting unit includes a boosting inductor, a third switching transistor, a first rectifier diode and a second electrolytic capacitor, and a front end of the boosting inductor is connected to an output end of the input unit, the boosting inductor
  • the back end is connected to the drain of the third switch tube, the source of the third switch tube is connected to the front end, and the gate of the third switch tube is used to access a PWM control signal, the third switch tube
  • the drain is connected to the anode of the first rectifier diode, the cathode of the first rectifier diode is used as the output end of the PFC boosting unit, and the cathode of the first rectifier diode is connected to the anode of the second electrolytic capacitor, and the cathode of the second electrolytic capacitor Connect to the front end.
  • the method further includes an MCU control unit, a gate of the first switch tube, a gate of the second switch tube, a gate of the third switch tube, a gate of the sixth switch tube, and a gate of the seventh switch tube.
  • the poles are respectively connected to the MCU control unit, and the MCU control unit is configured to respectively output PWM signals to the first switch tube, the second switch tube, the third switch tube, the sixth switch tube and the seventh switch tube to control the first switch The on and off states of the tube, the second switch tube, the third switch tube, the sixth switch tube, and the seventh switch tube.
  • the method further includes an AC sampling unit connected between the input end of the input unit and the MCU control unit, wherein the AC sampling unit is configured to collect the voltage of the AC side of the input unit and feed back to the MCU control unit.
  • the AC sampling unit includes an operational amplifier, and two input ends of the operational amplifier are respectively connected to an input end of the input rectifying and filtering unit through a current limiting resistor, and an output end of the operational amplifier is connected to the MCU control unit. .
  • a first sampling resistor is connected between the source and the front end of the third switching transistor, and a source of the third switching transistor is connected to the MCU control unit, and the MCU is used by the first sampling resistor.
  • the control unit collects an electrical signal of the source of the third switching transistor.
  • the method further includes a second sampling resistor and a third sampling resistor connected in series, the front end of the second sampling resistor is connected to an output end of the full bridge isolation conversion unit, and the back end of the third sampling resistor is connected
  • the MCU control unit causes the MCU control unit to acquire an electrical signal output by the full bridge isolation transform unit by the second sampling resistor and the third sampling resistor.
  • the inverter inverting unit comprises a fourth switching tube, a fifth switching tube, a third electrolytic capacitor and a fourth electrolytic capacitor, and a drain of the fourth switching tube is connected to an output of the full bridge isolation conversion unit.
  • the anode of the fourth switch tube is connected to the drain of the fifth switch tube
  • the source of the fifth switch tube is connected to the output terminal of the full bridge isolation converter unit
  • the fourth switch tube The gates of the gate and the fifth switch tube are respectively used to connect two PWM pulse signals with opposite phases
  • the anode of the third electrolytic capacitor is connected to the drain of the fourth switch tube, and the cathode of the third electrolytic capacitor Connecting the back end, the cathode of the third electrolytic capacitor is further connected to the anode of the fourth electrolytic capacitor, the cathode of the fourth electrolytic capacitor is connected to the source of the fifth switching transistor, and the source of the fourth switching transistor
  • a negative electrode of the third electrolytic capacitor is used as an output end of the inverter inverting unit.
  • a first resistor is connected between the gate and the source of the fourth switching transistor, and a second resistor is connected between the gate and the source of the fifth switching transistor.
  • the DC voltage outputted by the input unit is boosted by the PFC boosting unit, and then output to the full bridge isolation conversion unit,
  • the bridge isolation conversion unit when the first switching tube and the seventh switching tube are turned on, the current is formed by the first switching tube, the transformer primary coil, and the seventh switching tube to the front end, and the voltage of the primary winding of the transformer is directly on the bottom.
  • the second diode is filtered by the reverse voltage to the second capacitor, forming a DC voltage on the second capacitor; when the second switch and When the sixth switch tube is turned on, the current is formed by the second switch tube, the transformer primary coil, and the sixth switch tube to the front end, and the transformer primary winding voltage is up and down, and then coupled to the transformer secondary through the transformer core.
  • the voltage passing through the first diode is a forward voltage, and is transmitted to the first capacitor, and a DC voltage that is positive and negative is formed on the first capacitor, so that the DC bus is present. Positive and negative voltages is formed.
  • the first capacitor, the second capacitor and the filter inductor form a filter circuit.
  • the output voltage can be adjusted to achieve boost or buck conversion.
  • the present invention not only realizes the isolated transmission of voltage, but also improves the PF value of the step-up/step-down conversion device, and also improves the output voltage quality, making the voltage conversion process more secure and reliable.
  • FIG. 1 is a schematic diagram of a modified wave voltage conversion circuit of the present invention.
  • FIG. 2 is a circuit schematic diagram of an AC sampling unit in a preferred embodiment of the present invention.
  • FIG. 3 is a circuit schematic diagram of an MCU control unit in a preferred embodiment of the present invention.
  • the invention discloses an intelligent correction wave voltage conversion circuit based on PFC, full bridge and half bridge. As shown in FIG. 1 to FIG. 3, it comprises:
  • a PFC boosting unit 20 is connected to the output end of the input unit 10 for boosting the output voltage of the input unit 10;
  • a full bridge isolation conversion unit 30 includes a first switch tube Q6, a second switch tube Q7, a sixth switch tube Q8, a seventh switch tube Q9, a transformer T1, a first diode D5, and a second diode D6.
  • a filter inductor L3 the drain of the sixth switch transistor Q8 is connected to the output end of the PFC boost unit 20, and the source of the sixth switch transistor Q8 is connected to the first end of the primary winding of the transformer T1, the first The drain of the second switch Q7 is connected to the second end of the primary winding of the transformer T1, the source of the second switch Q7 is connected to the front end, and the drain of the first switch Q6 is connected to the PFC boost unit 20.
  • the output of the first switch transistor Q6 is connected to the second end of the primary winding of the transformer T1, and the drain of the seventh switch transistor Q9 is connected to the first end of the primary winding of the transformer T1, the seventh The source of the switching transistor Q9 is connected to the front end, and the gate of the first switching transistor Q6, the gate of the second switching transistor Q7, the gate of the sixth switching transistor Q8, and the gate of the seventh switching transistor Q9 are respectively used.
  • the middle tap of the secondary winding of the transformer T1 is connected to the back end, and the transformer T1 times
  • the first end of the stage winding is connected to the anode of the first diode D5, the cathode of the first diode D5 is connected to the back end through the first capacitor C7, and the cathode of the first diode D5 is connected to a front end of the filter inductor L3, a second end of the secondary winding of the transformer T1 is connected to a cathode of the second diode D6, and an anode of the second diode D6 is connected to the rear end through a second capacitor C8.
  • the rear end of the filter inductor L3 and the anode of the second diode D6 serve as the output end of the full bridge isolation conversion unit 30;
  • An inverter inverting unit 40 is connected to an output end of the full-bridge isolation conversion unit 30 for inverting and converting the output voltage of the full-bridge isolation conversion unit 30 to output an alternating current.
  • the DC voltage output from the input unit 10 is boosted by the PFC boosting unit 20, and then output to the full-bridge isolation conversion unit 30.
  • the first switch When the tube Q6 and the seventh switch tube Q9 are turned on, the current is formed by the first switch tube Q6, the transformer T1 primary coil, and the seventh switch tube Q9 to the front end, and the voltage of the primary winding of the transformer T1 is positive and negative, and then passes.
  • the transformer T1 core is coupled to the transformer secondary, the second diode D6 is filtered by the reverse voltage to the second capacitor C8, and a DC voltage is formed on the second capacitor C8; when the second switch Q7 When the sixth switch tube Q8 is turned on, the current is formed by the second switch tube Q7, the transformer T1 primary coil, and the sixth switch tube Q8 to the front end, and the transformer T1 primary winding voltage is up-down and negative, and then magnetically passed through the transformer T1.
  • the core is coupled to the transformer secondary. At this time, the voltage passing through the first diode D5 is a forward voltage, and is transmitted to the first capacitor C7, and a DC voltage is formed on the first capacitor C7, which is positively and negatively negative. Positive and negative voltages are formed on the bus.
  • the first capacitor C7, the second capacitor C8 and the filter inductor L3 constitute a filter circuit. And by changing the turns ratio of the primary and secondary of the transformer T1, the output voltage can be adjusted to achieve boost or buck conversion.
  • the present invention not only realizes the isolated transmission of voltage, but also improves the PF value of the step-up/step-down conversion device, and also improves the output voltage quality, making the voltage conversion process more secure and reliable.
  • the input unit 10 includes a socket, a fuse F2, a lightning protection resistor RV1, a common mode suppression inductor L1, a safety capacitor CX1, and a rectifier bridge DB1.
  • the fuse F2 is connected in series to the socket.
  • the front end of the common mode suppression inductor L1 is connected in parallel to the socket, the lightning protection resistor RV1 is connected in parallel to the front end of the common mode suppression inductor L1, and the input terminals of the safety capacitor CX1 and the rectifier bridge DB1 are both Parallel to the rear end of the common mode rejection inductor L1, and the filter capacitor C1 is connected in parallel with the output terminal of the rectifier bridge DB1.
  • the PFC boosting unit 20 includes a boosting inductor L2, a third switching transistor Q5, a first rectifier diode D1, and a second electrolytic capacitor C2.
  • the front end of the boosting inductor L2 is connected to the input unit 10.
  • the output end of the boosting inductor L2 is connected to the drain of the third switching transistor Q5, the source of the third switching transistor Q5 is connected to the front end, and the gate of the third switching transistor Q5 is used for A PWM control signal is connected, a drain of the third switching transistor Q5 is connected to an anode of the first rectifier diode D1, a cathode of the first rectifier diode D1 is used as an output end of the PFC boosting unit 20, and the first rectification is performed.
  • the cathode of the diode D1 is connected to the anode of the second electrolytic capacitor C2, and the cathode of the second electrolytic capacitor C2 is connected to the front end.
  • the PFC boosting unit 20 if the filter capacitor C1 outputs a half-wave AC voltage, the PFC enters the boost mode to increase the PF value of the AC-to-AC intelligent buck conversion topology circuit, and after boosting, filtering through the second electrolytic capacitor C2.
  • the voltage is 400V.
  • the specific boosting principle is as follows: When the third switching transistor Q5 is turned on, the current on the filter capacitor C1 forms a loop through the boost inductor L2 and the third switch transistor Q5 to GND, and the boost inductor L2 stores energy; When the third switching transistor Q5 is turned off, an induced electromotive force is formed on the boosting inductor which is much higher than the input voltage, and the induced electromotive force is rectified by the freewheeling tube D1 to form a unidirectional pulse voltage and then sent to the second electrolytic capacitor C2 capacitor. Filtered and filtered into a DC voltage of 400V. And the third switch tube Q5 increases or decreases the on-time of the third switch tube Q5 according to the change of the input AC correction wave acquired by the control chip, so that the current and the voltage phase are aligned to increase the PF value.
  • the embodiment further includes an MCU control unit 80, a gate of the first switch tube Q6, a gate of the second switch tube Q7, and a gate of the third switch tube Q5.
  • the gate of the sixth switching transistor Q8 and the gate of the seventh switching transistor Q9 are respectively connected to the MCU control unit 80, and the MCU control unit 80 is configured to respectively output PWM signals to the first switching transistor Q6 and the second switching transistor Q7.
  • a third switch tube Q5, a sixth switch tube Q8, and a seventh switch tube Q9 for controlling the first switch tube Q6, the second switch tube Q7, the third switch tube Q5, the sixth switch tube Q8, and the seventh switch tube Q9 On/off status.
  • FIG. 2 further includes an AC sampling unit 70 connected between the input end of the input unit 10 and the MCU control unit 80.
  • the AC sampling unit 70 It is used to collect the voltage of the AC side of the input unit 10 and feed back to the MCU control unit 80.
  • the AC sampling unit 70 includes an operational amplifier U9B, and two input ends of the operational amplifier U9B are respectively connected to an input end of the input rectifying and filtering unit 10 through a current limiting resistor, and an output end of the operational amplifier U9B Connected to the MCU control unit 80.
  • a first sampling resistor R2A is connected between the source and the front end of the third switching transistor Q5, and the source of the third switching transistor Q5 is connected to the MCU control unit 80.
  • the first sampling resistor R2A causes the MCU control unit 80 to collect an electrical signal of the source of the third switching transistor Q5.
  • the embodiment further includes a second sampling resistor R13 and a third sampling resistor R15 connected in series, and the front end of the second sampling resistor R13 is connected to the whole
  • An output of the bridge isolation unit 30, a rear end of the third sampling resistor R15 is connected to the MCU control unit 80, and the MCU control unit 80 acquires the second sampling resistor R13 and the third sampling resistor R15.
  • the full bridge isolates the electrical signal output by the transform unit 30.
  • the inverter inverter unit 40 includes a fourth switch tube Q2 , a fifth switch tube Q4 , a third electrolytic capacitor C3 , and a fourth electrolytic capacitor C5 , and the fourth switch
  • the drain of the transistor Q2 is connected to the anode of the output of the full-bridge isolation converter unit 30, the source of the fourth switch transistor Q2 is connected to the drain of the fifth switch transistor Q4, and the source of the fifth switch transistor Q4 is connected.
  • the anode of the full-bridge isolation conversion unit 30 is negative, the gate of the fourth switching transistor Q2 and the gate of the fifth switching transistor Q4 are respectively used to access two PWM pulse signals of opposite phases, the third electrolytic The anode of the capacitor C3 is connected to the drain of the fourth switch transistor Q2, the cathode of the third electrolytic capacitor C3 is connected to the rear end, and the cathode of the third electrolytic capacitor C3 is also connected to the anode of the fourth electrolytic capacitor C5.
  • the cathode of the fourth electrolytic capacitor C5 is connected to the source of the fifth switching transistor Q4, and the source of the fourth switching transistor Q2 and the cathode of the third electrolytic capacitor C3 serve as the output terminal of the inverter inverting unit 40.
  • a first resistor R17 is connected between the gate and the source of the fourth switching transistor Q2, and a second resistor R23 is connected between the gate and the source of the fifth switching transistor Q4.
  • the voltage output by the full-bridge isolation conversion unit 30 forms a loop through the fourth switching transistor Q2, the load, and the fourth electrolytic capacitor C5 to supply a load to form a first half-cycle correction wave level;
  • the half-cycle correction chord level forms a loop through the fifth switch tube Q4, the load, and the third electrolytic capacitor C3, so that a complete power frequency correction wave AC voltage is formed on the load.
  • PWM2H and PWM2L are respectively sent to the GATE pole of the fourth switching transistor Q2 and the fifth switching transistor Q4.
  • the phase and frequency in the inverter inverter circuit operate in accordance with the mode set in the control chip.
  • the third electrolytic capacitor C3 and the fourth electrolytic capacitor C5 are also The filter function can be combined with the filter inductor L3 to form a filter circuit.
  • the inverter circuit has a simple structure, and the circuit only uses two MOS tubes, and the cost is low.
  • the intelligent correction wave voltage conversion circuit based on PFC, full bridge and half bridge disclosed in the invention has a high PF value, can realize isolation between the power grid and the output end, and has high security.
  • the output voltage can be automatically adjusted within the input full voltage range, the output frequency can be fixed, and the output voltage is a modified wave output, which has an automatic shaping function for the AC voltage.
  • the circuit of the invention is simple, convenient to control, and contains voltage and current. Sampling circuit to prevent surge voltage and current.

Abstract

L'invention concerne un circuit de conversion de tension d'onde de correction intelligente basé sur PFC, pont complet et demi-pont, comprenant : une unité d'entrée (10), une unité d'amplification PFC (20), une unité de transformation d'isolation en pont complet (30), et une unité d'inversion de phase (40). L'unité de transformation d'isolation en pont complet (30) comprend un premier transistor de commutation (Q6), un deuxième transistor de commutation (Q7), un sixième transistor (Q8), un septième transistor de commutation (Q9), un transformateur (T1), une première diode (D5), une deuxième diode (D6), et une inductance de filtre d'onde (L3); une électrode de source du sixième transistor de commutation (Q8) est connectée à une première extrémité d'un enroulement primaire du transformateur (T1), une électrode de drain du second transistor de commutation (Q7) est connecté à une seconde extrémité de l'enroulement primaire du transformateur (T1), une électrode de source du premier transistor de commutation (Q6) est connectée à la seconde extrémité de l'enroulement primaire du transformateur (T1), une électrode de drain du septième transistor de commutation (Q9) est connectée à la première extrémité de l'enroulement primaire du transformateur (T1), et une prise intermédiaire de l'enroulement secondaire du transformateur (T1) est connectée à une masse d'extrémité arrière. Le circuit de conversion de l'invention peut améliorer la valeur de facteur de puissance et améliorer la qualité de tension de sortie.
PCT/CN2017/080980 2017-01-04 2017-04-19 Circuit de conversion de tension d'onde de correction intelligente basé sur pfc, pont complet et demi-pont WO2018126554A1 (fr)

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CN201710003791.7 2017-01-04
CN201710003791.7A CN106787807A (zh) 2017-01-04 2017-01-04 基于pfc、全桥和半桥的智能型修正波电压转换电路

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WO2018126554A1 true WO2018126554A1 (fr) 2018-07-12

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CN110501625A (zh) * 2019-09-12 2019-11-26 荣信汇科电气技术有限责任公司 一种igbt饱和管压降在线测量电路
CN111267631A (zh) * 2020-04-01 2020-06-12 郑州精益达汽车零部件有限公司 基于hp2的客车用sic电机控制器电路驱动结构
CN112971847A (zh) * 2021-02-09 2021-06-18 青岛海信医疗设备股份有限公司 一种超声设备
CN114301295A (zh) * 2020-10-07 2022-04-08 浙江杭可仪器有限公司 一种直流集成电源及其设计方法

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