WO2018129832A1 - Circuit de conversion de tension à onde modifiée en demi-pont intelligent basé sur une pfc de vienne - Google Patents

Circuit de conversion de tension à onde modifiée en demi-pont intelligent basé sur une pfc de vienne Download PDF

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Publication number
WO2018129832A1
WO2018129832A1 PCT/CN2017/081781 CN2017081781W WO2018129832A1 WO 2018129832 A1 WO2018129832 A1 WO 2018129832A1 CN 2017081781 W CN2017081781 W CN 2017081781W WO 2018129832 A1 WO2018129832 A1 WO 2018129832A1
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Prior art keywords
diode
unit
electrolytic capacitor
switching transistor
anode
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PCT/CN2017/081781
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English (en)
Chinese (zh)
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侯涛
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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 WO2018129832A1 publication Critical patent/WO2018129832A1/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
    • 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
    • H02M1/007—Plural converter units in cascade
    • 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 half bridge correction wave voltage conversion circuit based on the Vienna PFC.
  • 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 adopts a complicated topology circuit structure, and involves many unit modules, which not only has high cost, but also has 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 a smart half-bridge modified wave voltage conversion circuit based on the Vienna PFC, which can simplify the circuit structure, improve the PF value, improve the output voltage quality, and save cost, in view of the deficiencies of the prior art. .
  • the present invention adopts the following technical solutions.
  • An intelligent half-bridge modified wave voltage conversion circuit based on Vienna PFC comprising: an input unit for connecting to an alternating current of a power grid; a Vienna PFC boosting unit comprising a boosting inductor, a first switching tube, and a first a diode, a second diode, a third diode, a fourth diode, a fifth diode, a sixth diode, a first electrolytic capacitor, and a second electrolytic capacitor, the boost inductor
  • the front end is connected to the first output end of the input unit
  • the rear end of the boost inductor is connected to the anode of the first diode and the cathode of the second diode
  • the drain of the first switch tube and the third a cathode of the diode is connected to the cathode of the first diode
  • a source of the first switching tube and an anode of the fourth diode are both connected to an anode of the second diode
  • the first switching tube
  • the input unit comprises a socket, a first fuse, a lightning protection resistor, a common mode suppression inductor and a safety capacitor, wherein the first fuse is connected to a neutral or a live line of the socket, and the common mode suppression inductor
  • the first fuse is connected to a neutral or a live line of the socket
  • the common mode suppression inductor 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
  • the safety capacitor is connected in parallel to the rear end of the common mode rejection inductor
  • the back end of the common mode suppression inductor is used as the output of the input unit end.
  • a control unit is further included, the gate of the first switch tube is connected to the control unit, and the control unit is configured to load a PWM pulse signal to the gate of the first switch tube.
  • control unit comprises a single chip microcomputer and peripheral circuits thereof.
  • the half bridge inverter unit includes a second switch tube, a third switch tube, a third electrolytic capacitor and a fourth electrolytic capacitor, and a drain of the second switch tube and a positive electrode of the third electrolytic capacitor are connected.
  • the anode of the PFC boost unit of the Vienna is positive, the source of the second switch is connected to the drain of the third switch, and the source of the third switch and the negative of the fourth electrolytic capacitor are connected to Vienna.
  • the output terminal of the PFC boosting unit is negative, the gate of the second switching tube and the gate of the third switching tube are respectively used to access a PWM control signal, so that the second switching tube and the third switching tube are alternately guided.
  • the anode of the third electrolytic capacitor and the anode of the fourth electrolytic capacitor are both connected to the common ground, and the anode of the fourth electrolytic capacitor serves as the first output end of the half bridge inverter unit, and the second switch tube The source serves as the second output of the half-bridge inverter unit.
  • the source of the third switch tube is connected in series with a limiting current resistor, and the source of the third switch tube is connected to the control unit, so that the control unit collects an electrical signal of the source of the third switch tube.
  • the voltage sampling unit further includes a first sampling resistor and a second sampling resistor connected in series, and a front end of the first sampling resistor is connected to a drain of the second switching transistor, The rear end of the second sampling resistor is connected to the control unit to enable the control unit to collect an electrical signal of the drain of the second switching transistor.
  • the method further includes an AC sampling unit connected between the input end of the input unit and the 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 control unit.
  • the AC sampling unit comprises an operational amplifier, and the two input ends of the operational amplifier are respectively connected to the input end of the input unit through a current limiting resistor, and the output end of the operational amplifier is connected to the control unit.
  • the voltage filtered by the first electrolytic capacitor and the second electrolytic capacitor after boosting is a positive and negative bus voltage
  • the specific boosting principle is as follows: when the AC voltage outputted by the input unit is up and down, when the first switch is turned on, the current output from the first output of the input unit is boosted, the first diode, and the first a switching transistor, a fourth diode, and a second output end of the input unit form a loop, and the boosting inductor stores energy; when the first switching transistor is turned off, the boost inductor releases energy through the first diode and the fifth The diode, the first electrolytic capacitor, and the input unit are returned to the front end of the boosting inductor, so that the induced voltage generated by the boosting inductor is rectified by the first diode and the fifth diode to form on the first electrolytic capacitor.
  • the DC voltage is positive and negative.
  • the first switch is turned on, and the current output by the input unit is passed through the boost inductor, the second diode, the first switch, the third diode, and the input unit.
  • the boosting inductor stores energy; when the first switching transistor is turned off, the energy released by the boosting inductor is returned to the second diode, the sixth diode, the second electrolytic capacitor, and the input unit through the freewheeling tube
  • the boosting inductor such that the induced voltage generated by the boosting inductor is rectified by the second diode and the sixth diode, forms a DC voltage that is positive and negative on the second electrolytic capacitor.
  • the voltage formed at the positive electrode of the first electrolytic capacitor is a positive voltage with respect to an intermediate point between the first electrolytic capacitor and the second electrolytic capacitor, and the negative electrode of the second electrolytic capacitor
  • the voltage formed is a voltage that is negative with respect to an intermediate point between the first electrolytic capacitor and the second electrolytic capacitor.
  • the on-time is adjusted by adjusting the duty ratio of the PWM signal of the gate of the first switch, so that the alternating current outputted by the voltage conversion circuit and the current and voltage phases on the input side are matched to increase the PF value.
  • the present invention not only improves the PF value of the voltage conversion circuit, but also improves the output voltage quality, making the voltage conversion process more secure and reliable.
  • the voltage conversion circuit of the invention has a simple structure and involves fewer unit modules, which not only reduces the failure rate of the product, but also saves the product volume and reduces the product cost.
  • 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 a control unit in a preferred embodiment of the present invention.
  • the invention discloses an intelligent half-bridge modified wave voltage conversion circuit based on Vienna PFC, which is combined with FIG. 1 to FIG. 3 and includes:
  • a Vienna PFC boosting unit 20 includes a boosting inductor L2, a first switching transistor Q3, a first diode D1, a second diode D2, a third diode D3, a fourth diode D4, and a a fifth diode D5, a sixth diode D6, a first electrolytic capacitor C1 and a second electrolytic capacitor C2, the front end of the boosting inductor L2 is connected to the first output end of the input unit 10,
  • the rear end of the boosting inductor L2 is connected to the anode of the first diode D1 and the cathode of the second diode D2, and the drain of the first switching transistor Q3 and the cathode of the third diode D3 are both connected to
  • the cathode of the first diode D1, the source of the first switching transistor Q3 and the anode of the fourth diode D4 are both connected to the anode of the second diode D2, the gate of the first switching transistor Q3 For connecting to the
  • the cathode of the first electrolytic capacitor C1 is connected to the anode of the second electrolytic capacitor C2, the cathode of the sixth diode D6 is connected to the anode of the fourth diode D4, and the anode of the sixth diode D6 is connected.
  • the first The positive electrode of the electrolytic capacitor C1 serves as the positive terminal of the output of the Vienna PFC boosting unit 20, and the negative electrode of the second electrolytic capacitor C2 serves as the Vienna PFC.
  • the output terminal of the boosting unit 20 is negative;
  • the half bridge inverter unit 30 is connected to the output of the Vienna PFC boost unit 20, which is used for inverter conversion of the output voltage of the Vienna PFC boost unit 20.
  • the Vienna PFC boosting unit when the input unit 10 transmits the alternating current to the Vienna PFC boosting unit 20, the Vienna PFC boosting unit enters the boosting mode to increase the PF value of the switching topology circuit, and after boosting, passes the first electrolysis.
  • the filtered voltage of the capacitor C1 and the second electrolytic capacitor C2 is a positive and negative bus voltage.
  • the specific boosting principle is as follows: when the AC voltage output by the input unit 10 is up and down, when the first switching transistor Q3 is turned on, the input is The current outputted by the first output terminal of the unit 10 forms a loop through the boosting inductor L2, the first diode D1, the first switching transistor Q3, the fourth diode D4, and the second output end of the input unit 10, and the boosting inductor L2 The energy is stored; when the first switching transistor Q3 is turned off, the energy released by the boosting inductor L2 is returned to the boosting inductor via the first diode D1, the fifth diode D5, the first electrolytic capacitor C1, and the input unit 10
  • the first switch Q3 When the AC voltage outputted by the input unit 10 is up-down, the first switch Q3 is turned on, and the current output by the input unit 10 is passed through the boost inductor L2, the second diode D2, the first switch Q3, and the third.
  • Diode D3, input unit 10 forms a loop, boost inductor L2 stores energy; when first switch Q3 is turned off, boost inductor L2 releases energy through freewheeling diode second diode D2, sixth pole
  • the tube D6, the second electrolytic capacitor C2, and the input unit 10 are returned to the boosting inductor L2, so that the induced voltage generated by the boosting inductor L2 is rectified by the second diode D2 and the sixth diode D6.
  • a DC voltage that is positive and negative is formed on the electrolytic capacitor C2. Since the first electrolytic capacitor C1 and the second electrolytic capacitor C2 are connected in series, the voltage formed at the anode of the first electrolytic capacitor C1 is a voltage that is positive with respect to the intermediate point between the first electrolytic capacitor C1 and the second electrolytic capacitor C2. The voltage formed by the negative electrode of the second electrolytic capacitor C2 is a voltage that is negative with respect to the intermediate point between the first electrolytic capacitor C1 and the second electrolytic capacitor C2. Adjusting the on-time of the PWM signal of the gate of the first switching transistor Q3 to adjust the on-time of the voltage conversion circuit The galvanic current coincides with the current and voltage phases on the input side to increase the PF value.
  • the present invention not only improves the PF value of the voltage conversion circuit, but also improves the output voltage quality, making the voltage conversion process more secure and reliable.
  • the voltage conversion circuit of the invention has a simple structure and involves fewer unit modules, which not only reduces the failure rate of the product, but also saves the product volume and reduces the product cost.
  • the input unit 10 includes a socket, a first fuse F2, a lightning protection resistor RV1, a common mode suppression inductor L1, and a safety capacitor CX1.
  • the first fuse F2 is connected in series to the zero line or the fire line of the socket.
  • the front end of the common mode suppressing 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 suppressing inductor L1, and the safety capacitor CX1 is connected in parallel to the rear end of the common mode suppressing inductor L1, and the The rear end of the common mode rejection inductor L1 serves as the output terminal of the input unit 10.
  • the embodiment further includes a control unit 60.
  • the gate of the first switch tube Q3 is connected to the control unit 60, and the control unit 60 is used to the first switch tube Q3.
  • the gate is loaded with a PWM pulse signal.
  • the control unit 60 includes a single chip U1 and its peripheral circuits.
  • the half bridge inverter unit 30 includes a second switching transistor Q1, a third switching transistor Q2, a third electrolytic capacitor C3, and a fourth electrolytic capacitor C4, and the drain of the second switching transistor Q1
  • the anode of the third electrolytic capacitor C3 is connected to the positive terminal of the output terminal of the Vienna PFC boosting unit 20
  • the source of the second switching transistor Q1 is connected to the drain of the third switching transistor Q2, and the third switching transistor Q2
  • the source and the cathode of the fourth electrolytic capacitor C4 are both connected to the negative terminal of the output terminal of the Vienna PFC boosting unit 20, and the gate of the second switching transistor Q1 and the gate of the third switching transistor Q2 are respectively used for PWM control.
  • the second switch tube Q1 and the third switch tube Q2 are alternately turned on, the anode of the third electrolytic capacitor C3 and the anode of the fourth electrolytic capacitor C4 are connected to the common ground end, and the fourth electrolysis
  • the anode of the capacitor C4 serves as a first output of the half-bridge inverter unit 30, and the source of the second switch transistor Q1 serves as a second output of the half-bridge inverter unit 30.
  • the half bridge inverter unit 30 is composed of a second switching transistor Q1, a third switching transistor Q2, a third electrolytic capacitor C3, and a fourth electrolytic capacitor C4, and is filtered by a first electrolytic capacitor C1 and a second electrolytic capacitor C2.
  • Positive and negative DC voltage, through the second switch Q1, load, third electrolytic capacitor C3 form a loop to supply power to the load to form the first half-cycle correction wave level; the second half-cycle correction chord level through the third switch Q2
  • the load and the fourth electrolytic capacitor C4 form a loop, so that a complete power frequency correction wave AC voltage is formed on the load.
  • PWM2H and PWM2L are respectively sent to the GATE poles of the second switching transistor Q1 and the third switching transistor Q2.
  • 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 C4 also have the function of filtering.
  • the inverter circuit has simple control, and the circuit uses only two MOS tubes, and the cost is low.
  • the half bridge inverter unit 30 further includes a second fuse F1 connected in series with the first output end of the half bridge inverter unit 30.
  • a voltage sampling unit 40 is further included.
  • the voltage sampling unit 40 includes a first sampling resistor 13 and a second sampling resistor R15 connected in series.
  • the front end of the first sampling resistor 13 is connected to the second switch.
  • the drain of the transistor Q1, the rear end of the second sampling resistor R15 is connected to the control unit 60, so that the control unit 60 collects an electrical signal of the drain of the second switching transistor Q1.

Abstract

L'invention concerne un circuit de conversion de tension à onde modifiée en demi-pont intelligent basé sur une PFC de Vienne, comprenant : une unité d'entrée (10) ; une unité d'amplification de PFC de Vienne (20), comprenant une bobine d'induction d'amplification (L2), un premier transistor de commutation (Q3), une première diode (D1), une deuxième diode (D2), une troisième diode (D3), une quatrième diode (D4), une cinquième diode (D5), une sixième diode (D6), un premier condensateur électrolytique (C1) et un second condensateur électrolytique (C2), une électrode de grille du premier transistor de commutation étant utilisée pour accéder à un signal à impulsions de modulation d'impulsions en largeur, une électrode positive du premier condensateur électrolytique (C1) servant d'électrode positive de l'extrémité de sortie de l'unité d'amplification de PFC de Vienne (20), et une électrode négative du second condensateur électrolytique (C2) servant d'électrode négative de l'extrémité de sortie de l'unité d'amplification de PFC de Vienne (20) ; et une unité d'inversion en demi-pont (30) connectée à l'extrémité de sortie de l'unité d'amplification de PFC de Vienne (20), l'unité d'inversion en demi-pont (30) étant utilisée pour effectuer une conversion inverse de la tension de sortie de l'unité d'amplification de PFC de Vienne (20). La présente invention permet d'améliorer la qualité de tension de sortie et d'économiser des coûts de circuit.
PCT/CN2017/081781 2017-01-16 2017-04-25 Circuit de conversion de tension à onde modifiée en demi-pont intelligent basé sur une pfc de vienne WO2018129832A1 (fr)

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CN201710032376.4 2017-01-16
CN201710032376.4A CN106655804A (zh) 2017-01-16 2017-01-16 一种基于维也纳pfc的智能型半桥修正波电压转换电路

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