JPS5513636A - Protection circuit for switched-mode power supply circuit - Google Patents

Protection circuit for switched-mode power supply circuit

Info

Publication number
JPS5513636A
JPS5513636A JP8496578A JP8496578A JPS5513636A JP S5513636 A JPS5513636 A JP S5513636A JP 8496578 A JP8496578 A JP 8496578A JP 8496578 A JP8496578 A JP 8496578A JP S5513636 A JPS5513636 A JP S5513636A
Authority
JP
Japan
Prior art keywords
switching element
switched
circuit
power supply
mode power
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.)
Granted
Application number
JP8496578A
Other languages
Japanese (ja)
Other versions
JPS5820546B2 (en
Inventor
Tomoaki Uchida
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.)
Victor Company of Japan Ltd
Original Assignee
Victor Company of Japan Ltd
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 Victor Company of Japan Ltd filed Critical Victor Company of Japan Ltd
Priority to JP8496578A priority Critical patent/JPS5820546B2/en
Priority to FR7918082A priority patent/FR2431216A1/en
Priority to DE19792928227 priority patent/DE2928227C2/en
Publication of JPS5513636A publication Critical patent/JPS5513636A/en
Publication of JPS5820546B2 publication Critical patent/JPS5820546B2/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • H02H7/10—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 for converters; for rectifiers
    • H02H7/12—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 for converters; for rectifiers for static converters or rectifiers
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
    • H02H3/12—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to underload or no-load
    • 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
    • H02H7/10—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 for converters; for rectifiers
    • H02H7/12—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 for converters; for rectifiers for static converters or rectifiers
    • H02H7/1213—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 for converters; for rectifiers for static converters or rectifiers for DC-DC converters

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Dc-Dc Converters (AREA)

Abstract

PURPOSE: To prevent a switching element from being broken down by an overcurrent, by changing the duty factor of switching pulses.
CONSTITUTION: A resistor 14 is provided to detect a voltage corresponding to the current flowing through the switching element 13. A monostable multivibrator MM is shifted from a stable state to an unstable on when said current has exceeded a prescribed level. The duty factor of the switching pulses P5 to be supplied to the switching element 13 is changed on the basis of a voltage, which varies with time and which is produced by the time constant circuit CR of the monostable multivibrator when it is shifted to the unstable state. The switching element is thus protected from the overcurrent due to the short circuit of a load or the like.
COPYRIGHT: (C)1980,JPO&Japio
JP8496578A 1978-07-12 1978-07-12 Protection circuit for switched mode power supply circuit Expired JPS5820546B2 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP8496578A JPS5820546B2 (en) 1978-07-12 1978-07-12 Protection circuit for switched mode power supply circuit
FR7918082A FR2431216A1 (en) 1978-07-12 1979-07-12 Protection circuit for DC converter - has monostable to suppress switching transistor drive and circuit to gradually restart converter after short has cleared
DE19792928227 DE2928227C2 (en) 1978-07-12 1979-07-12 DC converter with protection circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8496578A JPS5820546B2 (en) 1978-07-12 1978-07-12 Protection circuit for switched mode power supply circuit

Publications (2)

Publication Number Publication Date
JPS5513636A true JPS5513636A (en) 1980-01-30
JPS5820546B2 JPS5820546B2 (en) 1983-04-23

Family

ID=13845326

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8496578A Expired JPS5820546B2 (en) 1978-07-12 1978-07-12 Protection circuit for switched mode power supply circuit

Country Status (3)

Country Link
JP (1) JPS5820546B2 (en)
DE (1) DE2928227C2 (en)
FR (1) FR2431216A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4374355A (en) * 1981-03-02 1983-02-15 General Electric Company Electrically isolated battery charger for on-board electric vehicle applications

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3019906C2 (en) * 1980-05-23 1982-05-27 Siemens AG, 1000 Berlin und 8000 München Circuit arrangement for limiting and regulating the collector current of the actuator transistor of a switched-mode power supply
DE3638035A1 (en) * 1986-11-07 1988-05-11 Siemens Ag Switching-off arrangement for a regulated power supply unit
FR2628269B1 (en) * 1988-03-04 1990-07-27 Sgs Thomson Microelectronics DEVICE FOR PROGRESSIVE STARTING OF A CUT-OUT POWER SUPPLY
EP0335194B1 (en) * 1988-03-25 1993-05-26 Siemens Aktiengesellschaft Process for limiting the output current of a supply circuit

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL238628A (en) * 1958-04-30
US3798531A (en) * 1972-06-05 1974-03-19 Instrumentation Specialties Co Switching-mode power supply
DE2416985C3 (en) * 1974-04-08 1979-12-06 Siemens Ag, 1000 Berlin Und 8000 Muenchen Arrangement for fast current limitation
JPS5512261Y2 (en) * 1974-11-14 1980-03-17

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4374355A (en) * 1981-03-02 1983-02-15 General Electric Company Electrically isolated battery charger for on-board electric vehicle applications

Also Published As

Publication number Publication date
DE2928227C2 (en) 1985-08-01
FR2431216A1 (en) 1980-02-08
DE2928227A1 (en) 1980-01-24
JPS5820546B2 (en) 1983-04-23
FR2431216B1 (en) 1983-01-14

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