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WO2018129834A1 - 一种基于mos管全桥整流的智能型修正波电压转换电路 - Google Patents

一种基于mos管全桥整流的智能型修正波电压转换电路 Download PDF

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Publication number
WO2018129834A1
WO2018129834A1 PCT/CN2017/081783 CN2017081783W WO2018129834A1 WO 2018129834 A1 WO2018129834 A1 WO 2018129834A1 CN 2017081783 W CN2017081783 W CN 2017081783W WO 2018129834 A1 WO2018129834 A1 WO 2018129834A1
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WIPO (PCT)
Prior art keywords
mos transistor
unit
mos
mos tube
transistor
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PCT/CN2017/081783
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English (en)
French (fr)
Inventor
廖志刚
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 WO2018129834A1 publication Critical patent/WO2018129834A1/zh

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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
    • 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
    • H02M5/4585—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 having a rectifier with controlled elements
    • 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
    • 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
    • H02M1/4283—Arrangements for improving power factor of AC input by adding a controlled rectifier in parallel to a first rectifier feeding a smoothing capacitor
    • 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 invention relates to a voltage conversion circuit, in particular to an intelligent correction wave voltage conversion circuit based on MOS tube full bridge rectification.
  • the AC-to-AC intelligent buck-boost conversion device is also called a travel plug
  • the voltage conversion circuit is a key circuit applied to the AC-to-AC intelligent buck-boost conversion device, which is also called a travel plug.
  • the rectifier part mostly uses a diode or a rectifier bridge as a rectifying component.
  • the rectifier diode or the bridge stack generates a serious heat. Therefore, a fan needs to be added in the portable AC-AC device. Heat dissipation, but this method will bring noise problems, while the input PF value is low, and the cost of the product is high and the volume is large.
  • the technical problem to be solved by the present invention is to provide an intelligent type based on MOS tube full bridge rectification which can improve the PF value of the voltage conversion device, reduce noise, reduce product cost, and easily realize output short circuit protection against the deficiencies of the prior art. Correct the wave voltage conversion circuit.
  • the present invention adopts the following technical solutions.
  • An intelligent correction wave voltage conversion circuit based on MOS tube full bridge rectification comprising: an AC input unit for accessing alternating current; a MOS tube full bridge rectifier unit comprising a first MOS tube and a second MOS a transistor, a third MOS transistor, a fourth MOS transistor, and a first capacitor, wherein a drain of the first MOS transistor and a source of the third MOS transistor are both connected to a first output end of the AC input unit, the second MOS The drain of the tube and the source of the fourth MOS transistor are both connected to the second output end of the AC input unit, and the source of the first MOS transistor and the source of the second MOS transistor are connected to each other and then rectified as a MOS tube.
  • the output terminal of the cell is positive, the drain of the third MOS transistor and the drain of the fourth MOS transistor are connected to each other as a negative terminal of the output end of the MOS transistor full-bridge rectifying unit, and the gate of the first MOS transistor and the second a gate of the MOS transistor, a gate of the third MOS transistor, and a gate of the fourth MOS transistor are respectively used for accessing a PWM pulse signal, so that the first MOS transistor and the fourth MOS transistor are simultaneously turned on.
  • the second MOS transistor and the third MOS transistor are simultaneously turned on, and the first capacitor is connected in parallel to the output end of the MOS tube full-bridge rectifying unit;
  • a PFC liter Means connected to the output of the full bridge rectifier MOS transistor means, means for boosting the PFC output voltage MOS transistor full bridge rectifier unit is a boost converter;
  • the inverter inverting unit is connected to an output end of the PFC boosting unit, and the inverter inverting unit is configured to invert an output voltage of the PFC boosting unit into an alternating current.
  • the PFC boosting unit includes a boosting inductor, a first switching transistor, a first rectifier diode, and an electrolytic capacitor, and a front end of the boosting inductor is connected to an output end of the input unit, and the boosting inductor is behind The end is connected to the drain of the first switch tube, the source of the first switch tube is grounded, the gate of the first switch tube is used to access a PWM control signal, and the drain of the first switch tube is connected The anode of the first rectifier diode, the cathode of the first rectifier diode serves as an output of the PFC boosting unit, and the cathode of the first rectifier diode is connected to the anode of the electrolytic capacitor, and the cathode of the electrolytic capacitor is grounded.
  • a pull-down resistor is connected between the gate and the source of the first switching transistor.
  • the method further includes a control unit, a gate of the first MOS transistor, a gate of the second MOS transistor, a gate of the third MOS transistor, a gate of the fourth MOS transistor, and a gate of the first switching transistor
  • the control unit is electrically connected to the control unit, and the on/off states of the first MOS transistor, the second MOS transistor, the third MOS transistor, the fourth MOS transistor, and the first switching transistor are controlled by the control unit.
  • the first output end and the second output end of the AC input unit are respectively connected to the control unit through a current limiting resistor, so that the control unit acquires the phase of the AC voltage.
  • the AC 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 rejection
  • the front end of the inductor 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 an AC input unit.
  • the output is used as an AC input unit.
  • the method further includes a DC voltage sampling unit, the DC voltage sampling unit includes a second sampling resistor and a third sampling resistor connected in series, and a front end of the second sampling resistor is connected to an output end of the PFC boosting unit.
  • the rear end of the third sampling resistor is connected to the control unit, and the control unit acquires an electrical signal output by the PFC boosting unit by the second sampling resistor and the third sampling resistor.
  • the inverter inverting unit comprises an inverter bridge composed of a second switching tube, a third switching tube, a fourth switching tube and a fifth switching tube, and a gate and a third switch of the second switching tube a gate of the tube, a gate of the fourth switch tube, and a gate of the fifth switch tube are respectively connected to the control unit, and the fourth switch tube, the fifth switch tube, the sixth switch tube, and the second control unit are controlled by the control unit
  • the seven switch tubes are turned on or off to cause the inverter inverting unit to output an alternating voltage.
  • the output of the inverter inverting unit has a second fuse in series.
  • control unit comprises a single chip microcomputer and its peripheral circuits.
  • the AC input form The element is connected to the AC power source, so that the AC power is transmitted to the MOS tube full bridge rectifier unit.
  • the MOS tube full bridge rectifier unit when L is a sinusoidal half cycle, the second MOS tube and the third MOS tube are turned on, and the current is made by the fire L line.
  • the second MOS transistor, the first capacitor, and the third MOS transistor form a loop.
  • the N line is a sinusoidal half cycle
  • the first MOS transistor and the fourth MOS transistor are turned on, and the current is made up of the N line, the first MOS transistor, and the first capacitor.
  • the fourth MOS transistor forms a loop; through the above process, a DC voltage is formed on the first capacitor, and the first capacitor is used to filter the rectified ripple, thereby obtaining smooth DC power and transmitting to the PFC boosting unit for boosting. Conversion, finally using the inverter inverter unit to invert the output voltage of the PFC boost unit to AC power for use.
  • the conduction internal resistance of the MOS transistor is small, the power consumption of the current on the MOS transistor is small, so the efficiency after rectification is high, and the PF value of the voltage conversion device can be effectively improved.
  • no fan cooling is required, which reduces noise, reduces product cost, and reduces product size.
  • FIG. 1 is a circuit schematic diagram of a modified wave voltage conversion circuit.
  • FIG. 2 is a circuit block diagram of the control unit.
  • the invention discloses an intelligent correction wave voltage conversion circuit based on MOS tube full bridge rectification, which is combined with FIG. 1 and FIG. 2 and includes:
  • a MOS full-bridge rectifier unit 20 includes a first MOS transistor Q1, a second MOS transistor Q2, a third MOS transistor Q3, a fourth MOS transistor Q4, and a first capacitor C1.
  • the drain of the first MOS transistor Q1 The source of the third MOS transistor Q3 is connected to the first output end of the AC input unit 10, and the drain of the second MOS transistor Q2 and the source of the fourth MOS transistor Q4 are both connected to the AC input unit 10.
  • the output terminal of the first MOS transistor Q1 and the source of the second MOS transistor Q2 are connected to each other as the positive terminal of the output end of the MOS transistor full-bridge rectifying unit 20, and the drain of the third MOS transistor Q3 is The drains of the fourth MOS transistor Q4 are connected to each other as the output terminal of the MOS transistor full-bridge rectifying unit 20, the gate of the first MOS transistor Q1, the gate of the second MOS transistor Q2, and the third MOS transistor Q3.
  • the gates of the gates and the fourth MOS transistors Q4 are respectively used to access the PWM pulse signals to simultaneously turn on the first MOS transistor Q1 and the fourth MOS transistor Q4, the second MOS transistor Q2 and the third MOS
  • the tube Q3 is simultaneously turned on, and the first capacitor C1 is connected in parallel to the output end of the MOS tube full-bridge rectifying unit 20;
  • a PFC boosting unit 30 is connected to the output end of the MOS tube full-bridge rectifying unit 20, and the PFC boosting unit 30 is configured to perform boost conversion on the output voltage of the MOS tube full-bridge rectifying unit 20;
  • An inverter inverter unit 50 is connected to the output of the PFC boost unit 30, and the inverter inverter unit 50 is for inverting the output voltage of the PFC boost unit 30 to AC power.
  • the AC input unit 10 is connected to the AC power source, so that the AC power is transmitted to the MOS tube full bridge rectifier unit 20, and in the MOS tube full bridge rectifier unit 20, when L is a sine half cycle, the first The second MOS transistor Q2 and the third MOS transistor Q3 are turned on, and the current is formed by the fire L line, the second MOS transistor Q2, the first capacitor C1, and the third MOS transistor Q3.
  • the N line is a sinusoidal half cycle
  • the first MOS transistor Q1 and the fourth MOS transistor Q4 are turned on, and the current is formed by the N line, the first MOS transistor Q1, the first capacitor C1, and the fourth MOS transistor Q4.
  • a DC voltage is formed on the first capacitor C1.
  • a capacitor C1 is used to filter out the rectified ripple, thereby obtaining smooth direct current and transmitting it to the PFC boosting unit 30 for boost conversion. Finally, the output voltage of the PFC boosting unit 30 is inverted by the inverter inverting unit 50.
  • the MOS transistor is used as the rectifying device. Since the conduction internal resistance of the MOS transistor is small, the current consumption of the current on the MOS transistor is small, so the efficiency after rectification is high and effective. Increase the PF value of the voltage conversion device without the need for fan cooling, which reduces noise, reduces product cost, and reduces product size.
  • the PWM of the first MOS transistor Q1, the second MOS transistor Q2, the third MOS transistor Q3, and the fourth MOS transistor Q4 can be directly turned off.
  • the signal in order to achieve the purpose of closing the input voltage, to better protect the subsequent unit circuit.
  • the present invention uses four resistors (R1, R2, R3, and R4) as four rectifications respectively.
  • the pull-down resistor of the MOS transistor prevents mis-conduction.
  • the PFC boosting unit 30 includes a boosting inductor L2, a first switching transistor Q5, a first rectifier diode D1, and an electrolytic capacitor C2.
  • the front end of the boosting inductor L2 is connected to the output of the input unit 10.
  • the back end of the boosting inductor L2 is connected to the drain of the first switching transistor Q5, the source of the first switching transistor Q5 is grounded, and the gate of the first switching transistor Q5 is used to access one PWM.
  • a drain of the first switching transistor Q5 is connected to an anode of the first rectifier diode D1
  • a cathode of the first rectifier diode D1 is an output end of the PFC boosting unit 30, and a cathode of the first rectifier diode D1
  • the positive electrode of the electrolytic capacitor C2 is connected, and the negative electrode of the electrolytic capacitor C2 is grounded.
  • a pull-down resistor R5 is connected between the gate and the source of the first switching transistor Q5.
  • the fast response of the first switching transistor Q5 can be realized by using a pull-down resistor.
  • the control unit outputs a high frequency control signal PWM5 to the GATE of the first switching transistor Q5, and the full bridge rectified half wave AC voltage composed of four MOS tubes is A switching transistor Q5 is boosted by a PFC boosting method.
  • the specific boosting principle is: when the first switching transistor Q5 is turned on, the first The current on the capacitor C1 forms a loop through the boost inductor L2, the first switch Q5 to the GND, and the boost inductor L2 stores energy; when the first switch Q5 is turned off, the boost inductor forms a much higher voltage than the input voltage.
  • the induced electromotive force is rectified by the first rectifier diode D1 of the freewheeling tube to form a unidirectional ripple voltage and then sent to the high frequency filter circuit for filtering.
  • the first switch tube Q5 controls the duty cycle change of the PWM1 according to the input fundamental voltage of the input grid voltage obtained by the AC sampling circuit, and the level rectified by the first rectifier diode D1 is sinusoidal but contains a high frequency The envelope half-wave level of the pulse.
  • the single chip U1 turns off the high frequency modulation circuit, and the first switch tube Q5 does not work; the MOS full bridge rectified and filtered voltage is directly output through L2 and the first rectifier diode D1.
  • the embodiment further includes a control unit 60, a gate of the first MOS transistor Q1, a gate of the second MOS transistor Q2, a gate of the third MOS transistor Q3, and a fourth MOS transistor Q4.
  • the gates and the gates of the first switching transistors Q5 are electrically connected to the control unit 60, respectively, and the first MOS transistor Q1, the second MOS transistor Q2, the third MOS transistor Q3, and the fourth MOS are controlled by the control unit 60.
  • the control unit 60 includes a single chip U1 and its peripheral circuits.
  • the first output end and the second output end of the alternating current input unit 10 are respectively connected to the control unit 60 through a current limiting resistor, so that the control unit 60 acquires the phase of the alternating current voltage.
  • the control unit samples the amplitude and phase of the AC voltage through the sampling resistors (R10, R11, R12, R14, R17, R18, R19, and R20), thereby controlling the first MOS transistor Q1 and the second MOS transistor Q2.
  • the AC 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 neutral line of the socket or a front end of the common mode rejection 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 rejection inductor L1, and the safety capacitor CX1 is connected in parallel to the rear end of the common mode rejection inductor L1.
  • the rear end of the common mode suppression inductor L1 serves as an output terminal of the AC input unit 10.
  • the embodiment further includes a DC voltage sampling unit 40, the DC voltage sampling unit 40 includes a second sampling resistor R13 and a third sampling resistor R15 connected in series, and the second sampling resistor R13
  • the front end is connected to the output end of the PFC boosting unit 30, the rear end of the third sampling resistor R15 is connected to the control unit 60, and the control unit 60 collects the PFC by the second sampling resistor R13 and the third sampling resistor R15.
  • the voltage sampling part is composed of R13 and R15, and is used for sending the collected voltage to the control unit, thereby determining the phase and the on-time of the inverter inverting unit.
  • the inverter inverter unit 50 includes an inverter bridge composed of a second switching transistor Q6, a third switching transistor Q7, a fourth switching transistor Q8, and a fifth switching transistor Q9, and the second switching transistor Gate of Q6, third switch tube Q7
  • the gate, the gate of the fourth switch Q8, and the gate of the fifth switch Q9 are respectively connected to the control unit 60, and the fourth switch Q1 and the fifth switch Q2 and the sixth are controlled by the control unit 60.
  • the switching transistor Q3 and the seventh switching transistor Q4 are turned on or off to cause the inverter inverting unit 50 to output an alternating voltage. Further, the output of the inverter inverting unit 50 has a second fuse F1 connected in series.
  • the inverter inverting unit 50 is composed of a second switching tube Q6, a third switching tube Q7, a fourth switching tube Q8 and a fifth switching tube Q9.
  • the filtered DC voltage is controlled by the second switching tube Q6, the load, and the fifth
  • the switch tube Q9 forms a loop to supply power to the load to form a first half cycle power frequency level; the second half cycle power frequency level forms a loop through the fourth switch tube Q8, the load, and the third switch tube Q7, so that the load is on the load.
  • a complete power frequency correction wave AC voltage is formed.
  • PWM6, PWM7L, PWM8, and PWM9L are respectively sent to the GATE poles of the second switching transistor Q6, the third switching transistor Q7, the fourth switching transistor Q8, and the fifth switching transistor Q9.
  • the phase and frequency in the inverter inverter circuit operate in accordance with the mode set in the control chip.
  • the intelligent correction wave voltage conversion circuit based on MOS tube full bridge rectification disclosed in the invention has the characteristics of high efficiency, high PF value, and the like, and does not need a fan, and adopts a natural cold correct mode to eliminate noise.
  • the invention can automatically adjust the output voltage in the input full voltage range, and fix the output frequency, and the output voltage is a modified wave output, and has an automatic shaping function for the alternating voltage.
  • the invention includes a voltage and current sampling circuit, which can prevent waves. Surge voltage and current.

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  • Power Engineering (AREA)
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Abstract

一种基于MOS管全桥整流的智能型修正波电压转换电路，其包括有交流输入单元（10）、PFC升压单元（30）、逆变倒相单元（50）以及MOS管全桥整流单元（20）。MOS管全桥整流单元包括有第一MOS管（Q1）、第二MOS管（Q2）、第三MOS管（Q3）、第四MOS管（Q4）和第一电容（C1），第一MOS管的源极和第二MOS管的源极相互连接后作为MOS管全桥整流单元的输出端正极，第三MOS管的漏极和第四MOS管的漏极相互连接后作为MOS管全桥整流单元的输出端负极，第一MOS管和第四MOS管同时导通，第二MOS管和第三MOS管同时导通。该电路可提高转换效率，实现无风扇散热要求，以及降低噪音。

Description

一种基于MOS管全桥整流的智能型修正波电压转换电路
技术领域
本发明涉及电压转换电路，尤其涉及一种基于MOS管全桥整流的智能型修正波电压转换电路。
背景技术
现有技术中，AC转AC智能升降压转换装置又被称为旅行排插，电压转换电路是应用到AC转AC智能升降压转换装置又被称为旅行排插的关键电路，可以在AC/AC变换中实现降压并稳定电压与频率的功能。目前AC/AC便隽式设备中，整流部份大多使用二极管或整流桥来做整流元件，当AC电压达到90V时整流二极管或桥堆发热严重，因此，在便携式AC-AC设备中需要增加风扇散热，但是这种方式将带来噪音问题，同时输入的PF值低，且产品的成本较高、体积较大。
发明内容
本发明要解决的技术问题在于，针对现有技术的不足，提供一种可提高电压转换装置的PF值、减少噪音、降低产品成本、容易实现输出短路保护的基于MOS管全桥整流的智能型修正波电压转换电路。
为解决上述技术问题，本发明采用如下技术方案。
一种基于MOS管全桥整流的智能型修正波电压转换电路，其包括有：一交流输入单元，用于接入交流电；一MOS管全桥整流单元，包括有第一MOS管、第二MOS管、第三MOS管、第四MOS管和第一电容，所述第一MOS管的漏极和第三MOS管的源极均连接于交流输入单元的第一输出端，所述第二MOS管的漏极和第四MOS管的源极均连接于交流输入单元的第二输出端，所述第一MOS管的源极和第二MOS管的源极相互连接后作为MOS管全桥整流单元的输出端正极，所述第三MOS管的漏极和第四MOS管的漏极相互连接后作为MOS管全桥整流单元的输出端负极，所述第一MOS管的栅极、第二MOS管的栅极、第三MOS管的栅极和第四MOS管的栅极分别用于接入PWM脉冲信号，以令所述第一MOS管和第四MOS管同时导通，所述第二MOS管和第三MOS管同时导通，所述第一电容并联于MOS管全桥整流单元的输出端；一PFC升压单元，连接于MOS管全桥整流单元的输出端，所述PFC升压单元用于对MOS管全桥整流单元的输出电压进行升压转换；一 逆变倒相单元，连接于PFC升压单元的输出端，所述逆变倒相单元用于将PFC升压单元的输出电压逆变为交流电。
优选地，所述PFC升压单元包括有升压电感、第一开关管、第一整流二极管和电解电容，所述升压电感的前端连接于输入单元的输出端，所述升压电感的后端连接于第一开关管的漏极，所述第一开关管的源极接地，所述第一开关管的栅极用于接入一路PWM控制信号，所述第一开关管的漏极连接第一整流二极管的阳极，所述第一整流二极管的阴极作为PFC升压单元的输出端，且该第一整流二极管的阴极连接电解电容的正极，电解电容的负极接地。
优选地，所述第一开关管的栅极和源极之间连接有下拉电阻。
优选地，还包括有一控制单元，所述第一MOS管的栅极、第二MOS管的栅极、第三MOS管的栅极、第四MOS管的栅极和第一开关管的栅极分别电性连接于控制单元，藉由所述控制单元而控制第一MOS管、第二MOS管、第三MOS管、第四MOS管和第一开关管的通断状态。
优选地，所述交流输入单元的第一输出端和第二输出端分别通过限流电阻而连接于控制单元，以令控制单元获取交流电电压的相位。
优选地，所述交流输入单元包括有插座、第一保险、防雷电阻、共模抑制电感和安规电容，所述第一保险串接于插座的零线或火线上，所述共模抑制电感的前端并联于插座，所述防雷电阻并联于共模抑制电感的前端，所述安规电容并联于共模抑制电感的后端，且所述共模抑制电感的后端作为交流输入单元的输出端。
优选地，还包括有一DC电压采样单元，所述DC电压采样单元包括有依次串联的第二采样电阻和第三采样电阻，所述第二采样电阻的前端连接于PFC升压单元的输出端，所述第三采样电阻的后端连接于控制单元，藉由所述第二采样电阻和第三采样电阻而令控制单元采集PFC升压单元输出的电信号。
优选地，所述逆变倒相单元包括由第二开关管、第三开关管、第四开关管和第五开关管组成的逆变桥，所述第二开关管的栅极、第三开关管的栅极、第四开关管的栅极和第五开关管的栅极分别连接于控制单元，藉由所述控制单元而控制第四开关管、第五开关管、第六开关管和第七开关管导通或截止，以令所述逆变倒相单元输出交流电压。
优选地，所述逆变倒相单元的输出端串联有第二保险。
优选地，所述控制单元包括单片机及其外围电路。
本发明公开的基于MOS管全桥整流的智能型修正波电压转换电路中，将交流输入单 元连接交流电源，使得交流电传输至MOS管全桥整流单元，在MOS管全桥整流单元中,当L为正弦半周时，令第二MOS管和第三MOS管导通，电流由火L线、第二MOS管、第一电容、第三MOS管形成回路，当N线为正弦半周时，第一MOS管和第四MOS管导通，电流由N线、第一MOS管、第一电容、第四MOS管形成回路；通过上述过程，使得第一电容上形成直流电压，该第一电容是为了滤除整流后的纹波，进而得到平滑的直流电并传输至PFC升压单元进行升压转换，最后利用逆变倒相单元将PFC升压单元的输出电压逆变为交流电以供使用。上述电压转换电路中，由于MOS管的导通内阻很少，所以电流在MOS管上的消耗功率就很小，因此整流后的效率会很高，并能有效提高电压转换装置的PF值，同时无需风扇散热，进而减少噪音、降低产品成本，以及减少产品体积。
附图说明
图1为修正波电压转换电路的电路原理图。
图2为控制单元的电路框图。
具体实施方式
下面结合附图和实施例对本发明作更加详细的描述。
本发明公开了一种基于MOS管全桥整流的智能型修正波电压转换电路，结合图1和图2所示，其包括有：
一交流输入单元10，用于接入交流电；
一MOS管全桥整流单元20，包括有第一MOS管Q1、第二MOS管Q2、第三MOS管Q3、第四MOS管Q4和第一电容C1，所述第一MOS管Q1的漏极和第三MOS管Q3的源极均连接于交流输入单元10的第一输出端，所述第二MOS管Q2的漏极和第四MOS管Q4的源极均连接于交流输入单元10的第二输出端，所述第一MOS管Q1的源极和第二MOS管Q2的源极相互连接后作为MOS管全桥整流单元20的输出端正极，所述第三MOS管Q3的漏极和第四MOS管Q4的漏极相互连接后作为MOS管全桥整流单元20的输出端负极，所述第一MOS管Q1的栅极、第二MOS管Q2的栅极、第三MOS管Q3的栅极和第四MOS管Q4的栅极分别用于接入PWM脉冲信号，以令所述第一MOS管Q1和第四MOS管Q4同时导通，所述第二MOS管Q2和第三MOS管Q3同时导通，所述第一电容C1并联于MOS管全桥整流单元20的输出端；
一PFC升压单元30，连接于MOS管全桥整流单元20的输出端，所述PFC升压单元30用于对MOS管全桥整流单元20的输出电压进行升压转换；
一逆变倒相单元50，连接于PFC升压单元30的输出端，所述逆变倒相单元50用于将PFC升压单元30的输出电压逆变为交流电。
上述智能型修正波电压转换电路中，将交流输入单元10连接交流电源，使得交流电传输至MOS管全桥整流单元20，在MOS管全桥整流单元20中,当L为正弦半周时，令第二MOS管Q2和第三MOS管Q3导通，电流由火L线、第二MOS管Q2、第一电容C1、第三MOS管Q3形成回路，当N线为正弦半周时，第一MOS管Q1和第四MOS管Q4导通，电流由N线、第一MOS管Q1、第一电容C1、第四MOS管Q4形成回路；通过上述过程，使得第一电容C1上形成直流电压，该第一电容C1是为了滤除整流后的纹波，进而得到平滑的直流电并传输至PFC升压单元30进行升压转换，最后利用逆变倒相单元50将PFC升压单元30的输出电压逆变为交流电以供使用。上述电压转换电路中，采用了MOS管作为整流器件，由于MOS管的导通内阻很少，所以电流在MOS管上的消耗功率就很小，因此整流后的效率会很高，并能有效提高电压转换装置的PF值，同时无需风扇散热，进而减少噪音、降低产品成本，以及减少产品体积。
实际应用中，当MOS管全桥整流单元20的输出端所接电路发生异常时，可以直接关闭第一MOS管Q1、第二MOS管Q2、第三MOS管Q3、第四MOS管Q4的PWM信号，从而达到关闭输入电压的目的，以更好的保护后续单元电路。
为使得第一MOS管Q1、第二MOS管Q2、第三MOS管Q3、第四MOS管Q4迅速响应，本发明采用了四个电阻(R1、R2、R3、R4)，分别作为四个整流MOS管的下拉电阻以防止误导通。
关于升压部分，所述PFC升压单元30包括有升压电感L2、第一开关管Q5、第一整流二极管D1和电解电容C2，所述升压电感L2的前端连接于输入单元10的输出端，所述升压电感L2的后端连接于第一开关管Q5的漏极，所述第一开关管Q5的源极接地，所述第一开关管Q5的栅极用于接入一路PWM控制信号，所述第一开关管Q5的漏极连接第一整流二极管D1的阳极，所述第一整流二极管D1的阴极作为PFC升压单元30的输出端，且该第一整流二极管D1的阴极连接电解电容C2的正极，电解电容C2的负极接地。
进一步地，所述第一开关管Q5的栅极和源极之间连接有下拉电阻R5。利用下拉电阻可实现第一开关管Q5的快速响应。
上述PFC升压单元30中，如果输入电网电压低于230V，控制单元输出高频控制信号PWM5给第一开关管Q5的GATE，四个MOS管组成的全桥整流后的半波交流电压被第一开关管Q5以PFC升压方式进行升压，具体的升压原理是：第一开关管Q5导通时，第一 电容C1上的电流经升压电感L2、第一开关管Q5到GND形成回路，升压电感L2储存能量；当第一开关管Q5关断时，升压电感上会形成比输入电压高得多的感应电动势，感应电动势经续流管第一整流二极管D1进行整流后形成单向脉动电压再送给高频滤波电路滤波。并且第一开关管Q5是根据交流采样电路采得的输入电网电压的为调制基波来控制PWM1的占空比变化，经第一整流二极管D1整流后的电平是按正弦变化却含有高频脉冲的包络半波电平。当输入电网电压等于或大于230V电压时单片机U1将高频调制电路关闭，第一开关管Q5不工作；MOS全桥整流滤波后的电压直接经L2、第一整流二极管D1输出。
为了实现闭环控制，本实施例还包括有一控制单元60，所述第一MOS管Q1的栅极、第二MOS管Q2的栅极、第三MOS管Q3的栅极、第四MOS管Q4的栅极和第一开关管Q5的栅极分别电性连接于控制单元60，藉由所述控制单元60而控制第一MOS管Q1、第二MOS管Q2、第三MOS管Q3、第四MOS管Q4和第一开关管Q5的通断状态。进一步地，所述控制单元60包括单片机U1及其外围电路。
进一步地，关于对交流信号的采样，所述交流输入单元10的第一输出端和第二输出端分别通过限流电阻而连接于控制单元60，以令控制单元60获取交流电电压的相位。具体是指，控制单元通过采样电阻(R10、R11、R12、R14、R17、R18、R19、R20)采样交流电压的幅值与相位，进而控制第一MOS管Q1、第二MOS管Q2、第三MOS管Q3、第四MOS管Q4的导通相位与时间。
本实施例中，所述交流输入单元10包括有插座、第一保险F2、防雷电阻RV1、共模抑制电感L1和安规电容CX1，所述第一保险F2串接于插座的零线或火线上，所述共模抑制电感L1的前端并联于插座，所述防雷电阻RV1并联于共模抑制电感L1的前端，所述安规电容CX1并联于共模抑制电感L1的后端，且所述共模抑制电感L1的后端作为交流输入单元10的输出端。
作为一种优选方式，本实施例还包括有一DC电压采样单元40，所述DC电压采样单元40包括有依次串联的第二采样电阻R13和第三采样电阻R15，所述第二采样电阻R13的前端连接于PFC升压单元30的输出端，所述第三采样电阻R15的后端连接于控制单元60，藉由所述第二采样电阻R13和第三采样电阻R15而令控制单元60采集PFC升压单元30输出的电信号。上述电压采样部分由R13、R15组成，用于将采得的电压送给控制单元，进而确定逆变倒相单元的相位和导通时间。
关于逆变部分，所述逆变倒相单元50包括由第二开关管Q6、第三开关管Q7、第四开关管Q8和第五开关管Q9组成的逆变桥，所述第二开关管Q6的栅极、第三开关管Q7的 栅极、第四开关管Q8的栅极和第五开关管Q9的栅极分别连接于控制单元60，藉由所述控制单元60而控制第四开关管Q1、第五开关管Q2、第六开关管Q3和第七开关管Q4导通或截止，以令所述逆变倒相单元50输出交流电压。进一步地，所述逆变倒相单元50的输出端串联有第二保险F1。
上述逆变倒相单元50由第二开关管Q6、第三开关管Q7、第四开关管Q8和第五开关管Q9组成，经过滤波后的直流电压由第二开关管Q6、负载、第五开关管Q9形成回路给负载供电，形成第一个半周期工频电平；第二个半周期工频电平通过第四开关管Q8、负载、第三开关管Q7形成回路，这样在负载上就形成了一个完整的工频修正波交流电压。控制单元输出的PWM信号经驱动电路后分别送出PWM6、PWM7L、PWM8、PWM9L给第二开关管Q6、第三开关管Q7、第四开关管Q8和第五开关管Q9的GATE极。逆变倒相电路中的相位与频率按照控制芯片内部设定的模式进行工作。
本发明公开的基于MOS管全桥整流的智能型修正波电压转换电路，具有高效率、高PF值等特点，同时无需风扇，其采用自然冷确方式，可消除噪声。本发明在输入全电压范围内能够能自动调节输出电压，并且固定输出频率，并且输出电压是以修正波输出，对交流电压有自动整形功能，此外本发明含有电压与电流采样电路，能防浪涌电压与电流。
以上所述只是本发明较佳的实施例，并不用于限制本发明，凡在本发明的技术范围内所做的修改、等同替换或者改进等，均应包含在本发明所保护的范围内。

Claims (10)

  1. 一种基于MOS管全桥整流的智能型修正波电压转换电路，其特征在于，包括有：
    一交流输入单元(10)，用于接入交流电；
    一MOS管全桥整流单元(20)，包括有第一MOS管(Q1)、第二MOS管(Q2)、第三MOS管(Q3)、第四MOS管(Q4)和第一电容(C1)，所述第一MOS管(Q1)的漏极和第三MOS管(Q3)的源极均连接于交流输入单元(10)的第一输出端，所述第二MOS管(Q2)的漏极和第四MOS管(Q4)的源极均连接于交流输入单元(10)的第二输出端，所述第一MOS管(Q1)的源极和第二MOS管(Q2)的源极相互连接后作为MOS管全桥整流单元(20)的输出端正极，所述第三MOS管(Q3)的漏极和第四MOS管(Q4)的漏极相互连接后作为MOS管全桥整流单元(20)的输出端负极，所述第一MOS管(Q1)的栅极、第二MOS管(Q2)的栅极、第三MOS管(Q3)的栅极和第四MOS管(Q4)的栅极分别用于接入PWM脉冲信号，以令所述第一MOS管(Q1)和第四MOS管(Q4)同时导通，所述第二MOS管(Q2)和第三MOS管(Q3)同时导通，所述第一电容(C1)并联于MOS管全桥整流单元(20)的输出端；
    一PFC升压单元(30)，连接于MOS管全桥整流单元(20)的输出端，所述PFC升压单元(30)用于对MOS管全桥整流单元(20)的输出电压进行升压转换；
    一逆变倒相单元(50)，连接于PFC升压单元(30)的输出端，所述逆变倒相单元(50)用于将PFC升压单元(30)的输出电压逆变为交流电。
  2. 如权利要求1所述的基于MOS管全桥整流的智能型修正波电压转换电路，其特征在于，所述PFC升压单元(30)包括有升压电感(L2)、第一开关管(Q5)、第一整流二极管(D1)和电解电容(C2)，所述升压电感(L2)的前端连接于输入单元(10)的输出端，所述升压电感(L2)的后端连接于第一开关管(Q5)的漏极，所述第一开关管(Q5)的源极接地，所述第一开关管(Q5)的栅极用于接入一路PWM控制信号，所述第一开关管(Q5)的漏极连接第一整流二极管(D1)的阳极，所述第一整流二极管(D1)的阴极作为PFC升压单元(30)的输出端，且该第一整流二极管(D1)的阴极连接电解电容(C2)的正极，电解电容(C2)的负极接地。
  3. 如权利要求2所述的基于MOS管全桥整流的智能型修正波电压转换电路，其特征在于，所述第一开关管(Q5)的栅极和源极之间连接有下拉电阻(R5)。
  4. 如权利要求3所述的基于MOS管全桥整流的智能型修正波电压转换电路，其特征在于，还包括有一控制单元(60)，所述第一MOS管(Q1)的栅极、第二MOS管(Q2)的栅极、第三MOS管(Q3)的栅极、第四MOS管(Q4)的栅极和第一开关管(Q5)的栅极分 别电性连接于控制单元(60)，藉由所述控制单元(60)而控制第一MOS管(Q1)、第二MOS管(Q2)、第三MOS管(Q3)、第四MOS管(Q4)和第一开关管(Q5)的通断状态。
  5. 如权利要求4所述的基于MOS管全桥整流的智能型修正波电压转换电路，其特征在于，所述交流输入单元(10)的第一输出端和第二输出端分别通过限流电阻而连接于控制单元(60)，以令控制单元(60)获取交流电电压的相位。
  6. 如权利要求1所述的基于MOS管全桥整流的智能型修正波电压转换电路，其特征在于，所述交流输入单元(10)包括有插座、第一保险(F2)、防雷电阻(RV1)、共模抑制电感(L1)和安规电容(CX1)，所述第一保险(F2)串接于插座的零线或火线上，所述共模抑制电感(L1)的前端并联于插座，所述防雷电阻(RV1)并联于共模抑制电感(L1)的前端，所述安规电容(CX1)并联于共模抑制电感(L1)的后端，且所述共模抑制电感(L1)的后端作为交流输入单元(10)的输出端。
  7. 如权利要求4所述的基于MOS管全桥整流的智能型修正波电压转换电路，其特征在于，还包括有一DC电压采样单元(40)，所述DC电压采样单元(40)包括有依次串联的第二采样电阻(R13)和第三采样电阻(R15)，所述第二采样电阻(R13)的前端连接于PFC升压单元(30)的输出端，所述第三采样电阻(R15)的后端连接于控制单元(60)，藉由所述第二采样电阻(R13)和第三采样电阻(R15)而令控制单元(60)采集PFC升压单元(30)输出的电信号。
  8. 如权利要求4所述的基于MOS管全桥整流的智能型修正波电压转换电路，其特征在于，所述逆变倒相单元(50)包括由第二开关管(Q6)、第三开关管(Q7)、第四开关管(Q8)和第五开关管(Q9)组成的逆变桥，所述第二开关管(Q6)的栅极、第三开关管(Q7)的栅极、第四开关管(Q8)的栅极和第五开关管(Q9)的栅极分别连接于控制单元(60)，藉由所述控制单元(60)而控制第四开关管(Q1)、第五开关管(Q2)、第六开关管(Q3)和第七开关管(Q4)导通或截止，以令所述逆变倒相单元(50)输出交流电压。
  9. 如权利要求8所述的基于MOS管全桥整流的智能型修正波电压转换电路，其特征在于，所述逆变倒相单元(50)的输出端串联有第二保险(F1)。
  10. 如权利要求4所述的基于MOS管全桥整流的智能型修正波电压转换电路，其特征在于，所述控制单元(60)包括单片机(U1)及其外围电路。
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