CN1067187C - 带过流保护的自激式开关电源装置 - Google Patents

带过流保护的自激式开关电源装置 Download PDF

Info

Publication number
CN1067187C
CN1067187C CN94118055A CN94118055A CN1067187C CN 1067187 C CN1067187 C CN 1067187C CN 94118055 A CN94118055 A CN 94118055A CN 94118055 A CN94118055 A CN 94118055A CN 1067187 C CN1067187 C CN 1067187C
Authority
CN
China
Prior art keywords
positive feedback
circuit
self
amplifier
coil
Prior art date
Legal status (The legal status 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 status listed.)
Expired - Fee Related
Application number
CN94118055A
Other languages
English (en)
Other versions
CN1118119A (zh
Inventor
黄得泰
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
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
Priority to CN94118055A priority Critical patent/CN1067187C/zh
Application filed by Individual filed Critical Individual
Priority to KR1019970701337A priority patent/KR100386957B1/ko
Priority to EP95929714A priority patent/EP0802603B1/en
Priority to PCT/CN1995/000071 priority patent/WO1996008067A1/zh
Priority to US08/793,697 priority patent/US5903417A/en
Priority to DE69529091T priority patent/DE69529091T2/de
Priority to AU33395/95A priority patent/AU693928B2/en
Priority to JP50907896A priority patent/JP3485930B2/ja
Priority to CA002198096A priority patent/CA2198096C/en
Publication of CN1118119A publication Critical patent/CN1118119A/zh
Application granted granted Critical
Publication of CN1067187C publication Critical patent/CN1067187C/zh
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
    • H02H9/02—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess current
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • 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
    • H02M3/338—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 in a self-oscillating arrangement
    • H02M3/3382—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 in a self-oscillating arrangement in a push-pull circuit arrangement
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
    • H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
    • H02M7/12—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Dc-Dc Converters (AREA)
  • Inductance-Capacitance Distribution Constants And Capacitance-Resistance Oscillators (AREA)
  • Inverter Devices (AREA)

Abstract

一种带过流保护的自激式开关电源装置，由于采用简单可靠的电流负反馈过流保护电路，配合互补桥式电路、无直流偏置电容耦合正反馈电路、交流电源起振电路等，使自激式开关电源可以成为一种电路简单，体积小，成本低廉的实用电源装置。

Description

带过流保护的自激式开关电源装置
本发明涉及一种带过流保护功能的自激式开关电源装置。
自激式开关电源实质上就是一个自激振荡器，当直接由自激振荡线圈输出时可作为高频加热装置，当经整流器整流输出时可作为一般直流电源装置。自激式开关电源具有电路简单，体积小，成本低等优点，但由于缺乏一种简单有效的过流保护方法，其稳定性和可靠性都较差，这使得自激式开关电源一直没有成为一种可靠实用的电源装置。
目前实用的自激式开关电源如三洋CTP-1946彩色电视机电源，其保护电路是对电流进行采样，过流时通过控制电路使振荡停止。这种保护电路线路复杂，控制电路本身需要电源供电，因此使整个电源的体积增大，成本提高。并且在过流保护期间，过流与保护是周期性反复出现，这种反复出现的冲击电流容易造成功率开关管的损坏，从而造成电源装置的稳定性和可靠性显著下降。
本发明的目的在于提供一种带过流保护的自激式开关电源装置，它能简单有效地克服现有自激式开关电源稳定性和可靠性差的缺点。
本发明的目的是这样实现的。图1是一般自激式开关电源装置的原理图，它包括：电源1，放大器2，自激振荡线圈3和正反馈耦合电路5。放大器2的输入端为Ⅰ，输出端为0。自激振荡线圈3又包括主振线圈La，正反馈线圈Lb和输出线圈Lc。图2是本发明所属自激式开关电源装置的原理图，它除了具有图1的基本结构外，其特征是，在放大器2的输入与输出公共端A加接有可提供直流通路、含有串联电阻成份的电流负反馈阻抗4，该电流负反馈阻抗4的阻抗值和预定的过电流保护点的电流值的乘积与自激振荡线圈3中的正反馈线圈Lb上的正反馈电压相近。当某种原因使放大器2的电流增大超过预定的电流值时，电流负反馈阻抗4上的负反馈电压也跟着增大至与正反馈线圈Lb上的正反馈电压相近，由于正反馈量不足，迫使振荡电路停振，达到过流保护的目的。
本发明只在原有装置中的放大器的输入与输出公共端加接电流负反馈阻抗，在几乎不增加装置成本和复杂性的基础上完全解决了过流保护的问题。
以下对附图进行说明，并结合实施例对本发明的具体结构及工作情况作进一步说明。
图1是一般自激式开关电源装置的原理图；
图2是本发明自激式开关电源装置的原理图；
图3是本发明自激式开关电源装置的一个实施例的线路示意图；
图4是本发明自激式开关电源装置的另一个实施例的线路示意图。
参见图3，图中示出按照本发明构成的一个开关电源装置，该装置包括：电源1，放大器2，自激振荡线圈3，电流负反馈阻抗4，正反馈耦合电路5，起振电路6，次级整流电路7。
110V交流电源经整流滤波后作为电源1。放大器2采用由两个输入与输出公共端都加接有电流负反馈阻抗4的互补放大器组成互补放大器对，再由两个互补放大器对组成全桥式电路。振荡线圈3由主振线圈La，正反馈线圈Lb，输出线圈Lc组成。正反馈耦合电路5采用电容器耦合，由正反馈线圈Lb经正反馈耦合电路5的电容器接至桥路激励端B组成正反馈电路。起振电路6由交流电源经限流电阻接至桥路激励端B组成。输出线圈Lc经次级整流电路7整流后作为直流电源输出。
本全桥式放大器由于没有直流偏置，在没有起振电路的情况下，桥路本身无法起振。为了使桥路起振，由交流电源经起振电路6的限流电阻接至桥路的激励端B。在交流电压作用下，B点电压产生变化，经桥路放大器的放大作用使主振线圈La两端的电压也跟着产生变化，由正反馈线圈Lb的正反馈作用使整个桥路起振。当桥路起振以后就不再受交流电源影响，而是按着桥路的固有频率振荡。
正反馈耦合电路5的电容器起微分作用，从而改善了激励电流波形，有利于降低放大器的开关损耗，使整个开关电源的效率得以提高。
当某种原因使放大器2的电流增大超过预定值时，由于电流负反馈阻抗4的负反馈作用，抵消了正反馈线圈Lb的正反馈电压，使正反馈量不足，于是振荡停止，达到过流保护的目的。当故障原因消失后，桥路在起振电路作用下再次起振，恢复正常工作。
自激振荡线圈3的输出线圈Lc的输出经次级整流电路7整流后，可作为直流电源输出。
图4是本发明的另一个实施例，其中由一个P沟道和一个N沟道的场效应管放大器组成互补放大器对作为半个桥路，另外半个桥路由两个串联的电容器8代替，其原理与图3一样。

Claims (2)

1．一种带过流保护的自激式开关电源装置，包括：电源(1)，放大器(2)，自激振荡线圈(3)，电流负反馈阻抗(4)，正反馈耦合电路(5)，其特征是：
(1)所述电源(1)为直流或交流整流电源；
(2)所述放大器(2)的输出端(0)与所述自激振荡线圈(3)中的主振线圈(La)相连；
(3)所述自激振荡线圈(3)中的正反馈线圈(Lb)经所述正反馈耦合电路(5)接所述放大器(2)的输入端(Ⅰ)以形成电压正反馈；
(4)所述电流负反馈阻抗(4)接所述放大器(2)的输出与输入公共端(A)以形成电流负反馈；
(5)所述电流负反馈阻抗(4)的阻抗值与预定的过流保护点的电流值的乘积与所述自激振荡线圈(3)中正反馈线圈(Lb)的正反馈电压相近。
2．根据权利要求1所述的电源装置，其特征在于：
(1)所述放大器(2)是由两个输入与输出公共端都接有所述电流负反馈阻抗(4)的互补放大器组成互补放大器对，再由两个所述互补放大器对组成全桥电路而构成，或是由两个串联的电容器(8)与一个所述互补放大器对组成半桥电路而构成；
(2)所述正反馈耦合电路(5)用电容器耦合，即由所述自激振荡线圈(3)中的正反馈线圈(Lb)经正反馈耦合电路(5)的电容器接到桥路激励端(B)组成正反馈电路；以及
(3)所述电源装置还包括一起振电路(6)，该电路由交流电源经限流电阻接到所述桥路激励端(B)组成。
CN94118055A 1994-09-03 1994-11-10 带过流保护的自激式开关电源装置 Expired - Fee Related CN1067187C (zh)

Priority Applications (9)

Application Number Priority Date Filing Date Title
CN94118055A CN1067187C (zh) 1994-09-03 1994-11-10 带过流保护的自激式开关电源装置
EP95929714A EP0802603B1 (en) 1994-09-03 1995-08-30 Self-excitation type switch power supply unit with overcurrent protection
PCT/CN1995/000071 WO1996008067A1 (fr) 1994-09-03 1995-08-30 Alimentation electrique a commutateur, du type a oscillateur auto-excite a protection contre les courants de surcharge
US08/793,697 US5903417A (en) 1994-09-03 1995-08-30 Self-excitation type switch power supply unit with overcurrent protection
KR1019970701337A KR100386957B1 (ko) 1994-09-03 1995-08-30 자려발진식스위치전원공급장치
DE69529091T DE69529091T2 (de) 1994-09-03 1995-08-30 Schaltnetzteil mit selbsterregtem oszillator mit überstromschutz
AU33395/95A AU693928B2 (en) 1994-09-03 1995-08-30 A self-excited oscillator type switch power supply with overcurrent protection
JP50907896A JP3485930B2 (ja) 1994-09-03 1995-08-30 過電流保護付き自励型スイッチ電源ユニット
CA002198096A CA2198096C (en) 1994-09-03 1995-08-30 A self-excited oscillator type switch power supply with overcurrent protection

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
CN94115838 1994-09-03
CN94118055A CN1067187C (zh) 1994-09-03 1994-11-10 带过流保护的自激式开关电源装置
CN94115838.1 1994-11-10

Publications (2)

Publication Number Publication Date
CN1118119A CN1118119A (zh) 1996-03-06
CN1067187C true CN1067187C (zh) 2001-06-13

Family

ID=25743508

Family Applications (1)

Application Number Title Priority Date Filing Date
CN94118055A Expired - Fee Related CN1067187C (zh) 1994-09-03 1994-11-10 带过流保护的自激式开关电源装置

Country Status (9)

Country Link
US (1) US5903417A (zh)
EP (1) EP0802603B1 (zh)
JP (1) JP3485930B2 (zh)
KR (1) KR100386957B1 (zh)
CN (1) CN1067187C (zh)
AU (1) AU693928B2 (zh)
CA (1) CA2198096C (zh)
DE (1) DE69529091T2 (zh)
WO (1) WO1996008067A1 (zh)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100454739C (zh) * 2004-05-18 2009-01-21 上海美芝欧加电器有限公司 一种自激式开关电源
JP4669306B2 (ja) * 2005-03-10 2011-04-13 三洋電機株式会社 擬似共振方式スイッチング電源装置及びそれを用いた擬似共振方式スイッチング電源回路

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1050625A (zh) * 1990-10-17 1991-04-10 邹鹏程 自激式开关稳压电源

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB199179A (en) * 1922-04-04 1923-06-21 Otto Scheib Hair-curlers
US3030590A (en) * 1958-09-26 1962-04-17 Sylvania Thorn Colour Television Laboratories Ltd Electric power converters
DE1283908B (de) * 1966-10-14 1968-11-28 Telefunken Patent UEberlastungsschutzschaltung fuer einen Transistorverstaerker in Emitterfolgerschaltung
US4236187A (en) * 1977-10-18 1980-11-25 Sharp Kabushiki Kaisha Power supply voltage stabilizer
US4323961A (en) * 1980-09-12 1982-04-06 Astec Components, Ltd. Free-running flyback DC power supply
JPS6028771A (ja) * 1983-07-27 1985-02-13 Toshiba Corp 自励発振停止回路
JPS63103671A (ja) * 1986-10-20 1988-05-09 Sawafuji Electric Co Ltd トランジスタ・インバ−タ
JPH0287970A (ja) * 1988-09-22 1990-03-28 Fujitsu Ltd 自励式スイッチィング電源における過電圧保護回路
JPH03198668A (ja) * 1989-12-25 1991-08-29 Matsushita Electric Works Ltd インバータ装置
DE4201744C2 (de) * 1992-01-23 1997-12-11 Insta Elektro Gmbh & Co Kg Zusatzschaltung in einem Schaltnetzteil für Niedervolthalogenlampen
FR2700426A1 (fr) * 1993-01-08 1994-07-13 Courier De Mere Henri Edouard Convertisseur électronique à haut rendement.
JP2784136B2 (ja) * 1993-10-19 1998-08-06 浜松ホトニクス株式会社 スイッチング電源の過負荷・短絡保護回路

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1050625A (zh) * 1990-10-17 1991-04-10 邹鹏程 自激式开关稳压电源

Also Published As

Publication number Publication date
AU693928B2 (en) 1998-07-09
WO1996008067A1 (fr) 1996-03-14
CA2198096C (en) 2002-01-01
DE69529091T2 (de) 2003-04-30
AU3339595A (en) 1996-03-27
US5903417A (en) 1999-05-11
EP0802603A1 (en) 1997-10-22
CA2198096A1 (en) 1996-03-14
JP3485930B2 (ja) 2004-01-13
EP0802603A4 (en) 1999-12-15
EP0802603B1 (en) 2002-12-04
CN1118119A (zh) 1996-03-06
DE69529091D1 (de) 2003-01-16
KR100386957B1 (ko) 2003-08-19
KR970705862A (ko) 1997-10-09
JPH10506519A (ja) 1998-06-23

Similar Documents

Publication Publication Date Title
CN107147296B (zh) 一种带下拉有源钳位支路的隔离型dc-dc升压变换器
CN101854120B (zh) 一种高效率多功能反激变换器
CN107979287A (zh) 用于主开关切换转换的零电压开关式逆变器
EP1328139A1 (en) Digital powerline control
CN100435465C (zh) 具有电流和电压限值的简易开关电源
CN1135681C (zh) 电流谐振型开关电源
CN101964586A (zh) 涌流控制器
EP1120896A3 (en) Resonant power converter
CN100463348C (zh) 开关电源设备
CN101202542A (zh) 红外节能电路
CN107017779B (zh) 一种带下拉有源钳位支路的隔离型dc-dc升压变换器控制方法
CN1067187C (zh) 带过流保护的自激式开关电源装置
CN107332453B (zh) 一种单级式光伏离网逆变器及其控制方法
CN2202375Y (zh) 带过流保护的自激式开关电源装置
CN107395037A (zh) 一种输出电压可调的高功率因数桥式同步整流电路
CN201349355Y (zh) 零电压切换谐振逆变器的控制电路
CN212909356U (zh) 软启动辅助电源电路
CN210444179U (zh) 一种buck电流馈电推挽拓扑串联谐振电路
CN109888935B (zh) 一种电网隔离取电方法及电路
CN207083023U (zh) 一种输出电压可调的高功率因数桥式同步整流电路
CN218919970U (zh) 一种交流过压保护的开关电源
JPH05260739A (ja) フォワードコンバータ
CN1066295C (zh) 一种电源电路和包括该电源电路的电动剃须刀
CN104994652B (zh) 无电解电容低纹波led驱动电源的智能数字控制电路
CN215734032U (zh) 一种利用pfc控制器驱动的升压电路

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
C14 Grant of patent or utility model
GR01 Patent grant
C19 Lapse of patent right due to non-payment of the annual fee
CF01 Termination of patent right due to non-payment of annual fee