WO2015180107A1 - Circuit de source d'alimentation en courant continu - Google Patents

Circuit de source d'alimentation en courant continu Download PDF

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Publication number
WO2015180107A1
WO2015180107A1 PCT/CN2014/078829 CN2014078829W WO2015180107A1 WO 2015180107 A1 WO2015180107 A1 WO 2015180107A1 CN 2014078829 W CN2014078829 W CN 2014078829W WO 2015180107 A1 WO2015180107 A1 WO 2015180107A1
Authority
WO
WIPO (PCT)
Prior art keywords
power supply
supply circuit
capacitor
module
inductor
Prior art date
Application number
PCT/CN2014/078829
Other languages
English (en)
Chinese (zh)
Inventor
王合球
Original Assignee
深圳欧陆通电子有限公司
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 深圳欧陆通电子有限公司 filed Critical 深圳欧陆通电子有限公司
Priority to PCT/CN2014/078829 priority Critical patent/WO2015180107A1/fr
Publication of WO2015180107A1 publication Critical patent/WO2015180107A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/42—Circuits or arrangements for compensating for or adjusting power factor in converters or inverters
    • 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
    • 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 invention relates to the field of power supplies, and more particularly to a DC power supply circuit.
  • the DC power supply circuit is generally a two-stage structure.
  • the first stage is a PFC rectifier circuit, which is used to rectify the AC voltage and increase the power factor value to reduce the harmonics to provide DC power to the second stage.
  • the second stage is A DC-DC conversion circuit for converting a voltage to meet an output voltage specification.
  • the output voltage terminal is connected with an electrolytic capacitor for voltage regulation in parallel. If the electrolytic capacitor is used for a long time, the electrolyte may leak, resulting in a large capacitance error of the electrolytic capacitor. Therefore, electrolysis The life of the capacitor determines the service life of the DC power supply, especially for the LED power supply. Therefore, how to avoid the use of electrolytic capacitors is the key to improving the service life of the power supply.
  • the technical problem to be solved by the present invention is that, in view of the defect that the DC power supply has a low service life due to the use of an electrolytic capacitor in the prior art, a DC power supply circuit is provided, which can improve the life of the DC power supply without using an electrolytic capacitor. .
  • the technical solution adopted by the present invention to solve the technical problem thereof is: constructing a DC power supply circuit, including
  • the DC power supply circuit further includes a boosting module and a resonant converter, and an input end of the boosting module is connected to an output end of the PFC rectifier module, and an output end of the boosting module is connected to the An input end of the resonant converter, an output end of the resonant converter being an output end of the DC power supply circuit.
  • the boosting module includes a first inductor, a first switching transistor, a first diode, and a first capacitor, wherein the first end of the first inductor Connecting a positive output end of the PFC rectifier module, a second end of the first inductor is respectively connected to a positive pole of the first diode and a first end of the first switch transistor, the first diode
  • the negative terminal is connected to the first end of the first capacitor, and the second end of the first switch tube and the second end of the first capacitor are respectively connected to the negative output end of the PFC rectifier module.
  • the resonant converter includes a square wave conversion circuit, a resonance circuit, a rectifier circuit, and a filter circuit that are sequentially connected.
  • the square wave conversion circuit is a half bridge inverter circuit or a full bridge inverter circuit.
  • the resonant circuit includes a transformer
  • the rectifying circuit includes a second switching tube and a third switching tube, and the same name and different ends of the primary winding of the transformer
  • the first end and the second output end of the square wave conversion circuit are respectively connected, and the same end of the first secondary winding of the transformer is connected to the first end of the second switching tube, and the first end of the transformer a different end of the second secondary winding is connected to the first end of the third switching tube, and a different end of the first secondary winding of the transformer is connected to a same end of the second secondary winding of the transformer,
  • the second end of the second switch tube and the second end of the third switch tube are grounded.
  • the filter circuit includes a second inductor, a second capacitor, and a third capacitor, wherein the first end of the second inductor is connected to the first pair of the transformer a second end of the second inductor is a positive output end of the DC power supply circuit, and a second capacitor is connected between the first end of the second inductor and ground, A third capacitor is coupled between the second end of the second inductor and ground.
  • the DC power supply circuit further includes:
  • [12] It is used to detect the output voltage of the DC power supply circuit, and turn off the overvoltage protection module of the PFC rectifier module when the voltage detection value is greater than the voltage preset value.
  • the DC power supply circuit further includes:
  • the DC power supply circuit further includes:
  • the DC power supply circuit further includes:
  • the PFC rectifier module rectifies and performs power on the AC input voltage Factor correction, but because the bandwidth of the PFC rectifier module is narrow and the loop response is slow, the DC voltage output by the PFC rectifier module is very unstable.
  • the boost module can boost the DC voltage outputted by the PFC rectifier module, the DC voltage can be quickly adjusted to achieve stability, which can make up for the instability of the output voltage of the PFC rectifier module, and achieve the purpose of replacing the electrolytic capacitor.
  • the resonant converter converts the DC voltage output from the boost module to meet the output voltage specification.
  • the resonant converter can be completely independent of the electrolytic capacitor compared to the prior art DC/DC converter. Therefore, the DC power supply circuit of this embodiment can omit the electrolytic capacitor, thereby increasing the life of the DC power supply.
  • FIG. 1 is a logic diagram of a first embodiment of a DC power supply circuit of the present invention
  • FIG. 2 is a circuit diagram of a second embodiment of a DC power supply circuit of the present invention.
  • the DC power supply circuit includes a PFC rectifier module 10, a boost module 20 and a resonant converter 30, and an input terminal of the boost module 20. Connected to the output of the PFC rectifier module 10, the output of the boost module 20 is coupled to the input of the resonant converter 30, and the output of the resonant converter 30 is the output of the DC power supply circuit.
  • the PFC rectifier module 10 rectifies the AC input voltage and performs power factor correction. However, since the bandwidth of the PFC rectifier module 10 is narrow, the loop response is slow. Therefore, the PFC rectifier module 10 The output DC voltage is very unstable.
  • the boosting module 20 can boost the DC voltage outputted by the PFC rectifier module 10, the DC voltage can be quickly adjusted to achieve stability, which can compensate for the instability of the output voltage of the PFC rectifier module 10, and achieve the purpose of replacing the electrolytic capacitor.
  • the resonant converter 30 converts the DC voltage outputted by the boosting module 20 to meet the output voltage index, and the resonant converter 30 can be completely independent of the electrolysis compared to the prior art DC/DC converter. capacitance. Therefore, the DC power supply circuit of this embodiment can omit the electrolytic capacitor, thereby increasing the life of the DC power source.
  • the DC power supply circuit includes a fuse F1, an EMI filter, a PFC rectifier module, a boost module, and a resonant converter, which are sequentially connected, and each part is described below.
  • the EMI filter includes a common mode inductor L1, a capacitor C1 and a capacitor C2, wherein the first end of the common mode inductor L1 is connected to the first end of the AC input voltage through the fuse F1, and the second end of the common mode inductor L1 is connected.
  • the second end of the common mode inductor L1 is connected to the first input end of the PFC rectifier module, and the fourth end of the common mode inductor L1 is connected to the second input end of the PFC rectifier module.
  • the capacitor C1 is connected between the first end and the second end of the common mode inductor L1, and the capacitor C2 is connected between the third end and the fourth end of the common mode inductor L2.
  • the diodes D1, D2, D3, and D4 form a diode rectifier bridge, and the two input ends of the diode rectifier bridge are respectively connected to the third end and the fourth end of the common mode inductor L1, and the diode rectifier bridge
  • the positive output is connected to the first end of the inductor L4 and the first end of the capacitor C3, the second end of the inductor L4 is connected to the anode of the diode D5 and the drain of the MOS transistor Q1, and the cathode of the diode D5 is connected to the first end of the capacitor C4.
  • the second end of the capacitor C3, the source of the MOS transistor Q1, and the second end of the capacitor C4 are respectively connected to the negative output terminal of the diode rectifier bridge.
  • the first end of the inductor L3 is connected to the cathode of the diode D5
  • the second end of the inductor L3 is connected to the anode of the diode D6 and the drain of the MOS transistor Q2
  • the cathode of the diode D6 is connected to the capacitor C5 first.
  • the source of the MOS transistor Q2 and the second terminal of the capacitor C5 are respectively connected to the negative output terminal of the diode rectifier bridge.
  • the resonant converter includes a square wave conversion circuit, a resonance circuit, a rectifier circuit, and a filter circuit which are sequentially connected.
  • the square wave conversion circuit selects a half bridge inverter circuit.
  • the drain of the MOS transistor Q3 and the first end of the capacitor C7 are respectively connected to the cathode of the diode D6, and the source of the MOS transistor Q3 is connected to the MOS.
  • the second end of the capacitor C7 is connected to the first end of the capacitor C8, and the source of the MOS transistor Q4 and the second end of the capacitor C8 are respectively connected to the negative output end of the diode rectifier bridge.
  • the same end of the primary winding of the transformer TX2 is connected to the second end of the capacitor C7, and the different end of the primary winding of the transformer TX2 is connected to the source of the MOS transistor Q3 through the capacitor C6, and the first secondary side of the transformer TX2 The opposite end of the winding is connected to the same end of its second secondary winding.
  • the same name of the first secondary winding of the transformer TX2 is connected to the drain of the MOS transistor Q5, and the different terminal of the second secondary winding of the transformer TX2 is connected to the drain of the MOS transistor Q6, the source of the MOS transistor Q5. It is grounded together with the source of MOS transistor Q6.
  • the first end of the inductor L5 is connected to the different end of the first secondary winding of the transformer TX2, and the capacitor C9 is connected between the first end of the inductor L5 and the ground, and the capacitor C10 is connected. Connected between the second end of the inductor L5 and the ground.
  • the DC voltage outputted by the boosting module is converted into a square wave voltage by controlling the on and off of the MOS transistors Q3 and Q4, and is loaded on the primary winding of the transformer TX2, coupled by the transformer TX2, and then passed.
  • the on/off of the MOS transistors Q5 and Q6 is controlled so that the voltage on the capacitor C9 is a DC voltage, and the DC voltage is filtered by the inductor L5 and the capacitor C10 to output a power supply to meet the power supply requirement of the load.
  • the square wave conversion circuit in this embodiment may also be a full bridge inverter circuit.
  • the DC power supply circuit of the present invention may further include at least one of an overvoltage protection module, an overcurrent protection module, and an overtemperature protection module.
  • the overvoltage protection module is configured to detect an output voltage of the DC power supply circuit, and turn off the PFC rectifier module when the voltage detection value is greater than a voltage preset value.
  • the overcurrent protection module is configured to detect an output current of the DC power supply circuit, and turn off the PFC rectifier module when the current detection value is greater than a current preset value.
  • the over temperature protection module is configured to detect the temperature of the DC power supply circuit, and turn off the PFC rectifier module when the temperature detection value is greater than the temperature preset value.

Abstract

L'invention concerne un circuit de source d'alimentation en courant continu, comprenant un module redresseur PFC (10), et comprenant en outre un module amplificateur (20) et un convertisseur à résonance (30). L'entrée du module amplificateur est raccordée à la sortie du module redresseur PFC, la sortie du module amplificateur est raccordée à l'entrée du convertisseur à résonance, et la sortie du convertisseur à résonance est la sortie du circuit de source d'alimentation en courant continu.
PCT/CN2014/078829 2014-05-29 2014-05-29 Circuit de source d'alimentation en courant continu WO2015180107A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/CN2014/078829 WO2015180107A1 (fr) 2014-05-29 2014-05-29 Circuit de source d'alimentation en courant continu

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2014/078829 WO2015180107A1 (fr) 2014-05-29 2014-05-29 Circuit de source d'alimentation en courant continu

Publications (1)

Publication Number Publication Date
WO2015180107A1 true WO2015180107A1 (fr) 2015-12-03

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2014/078829 WO2015180107A1 (fr) 2014-05-29 2014-05-29 Circuit de source d'alimentation en courant continu

Country Status (1)

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WO (1) WO2015180107A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TW201134073A (en) * 2010-03-22 2011-10-01 Skynet Electronic Co Ltd Series resonant converter with overload delay and short circuit protection mechanism
CN103154843A (zh) * 2010-08-27 2013-06-12 弗莱克斯电子有限责任公司 具有升压-降压-降压配置的功率转换器
CN204013236U (zh) * 2014-05-29 2014-12-10 深圳欧陆通电子有限公司 一种直流电源电路

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TW201134073A (en) * 2010-03-22 2011-10-01 Skynet Electronic Co Ltd Series resonant converter with overload delay and short circuit protection mechanism
CN103154843A (zh) * 2010-08-27 2013-06-12 弗莱克斯电子有限责任公司 具有升压-降压-降压配置的功率转换器
CN204013236U (zh) * 2014-05-29 2014-12-10 深圳欧陆通电子有限公司 一种直流电源电路

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