JPS57110077A - Protecting circuit for booster type converter - Google Patents

Protecting circuit for booster type converter

Info

Publication number
JPS57110077A
JPS57110077A JP18694280A JP18694280A JPS57110077A JP S57110077 A JPS57110077 A JP S57110077A JP 18694280 A JP18694280 A JP 18694280A JP 18694280 A JP18694280 A JP 18694280A JP S57110077 A JPS57110077 A JP S57110077A
Authority
JP
Japan
Prior art keywords
load
transistor
voltage
secondary coil
protecting circuit
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.)
Pending
Application number
JP18694280A
Other languages
Japanese (ja)
Inventor
Michio Kono
Tomiyasu Sagane
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.)
Fujitsu Ltd
Original Assignee
Fujitsu 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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP18694280A priority Critical patent/JPS57110077A/en
Publication of JPS57110077A publication Critical patent/JPS57110077A/en
Pending legal-status Critical Current

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
    • H02M3/00—Conversion of dc power input into dc power output
    • H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
    • H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
    • H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only

Landscapes

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

Abstract

PURPOSE:To prevent the further increase of a load current by utilizing the fact that the alternating voltage generated at the secondary coil of a transformer become zero when a load voltage is lowered to an input voltage by the operation of an overcurrent protecting circuit. CONSTITUTION:When a current higher than a rated value flows through a load, an overcurrent detecting circuit operates to shorten the conducting time of a transistor TR1 in an oscillator circuit, with the result that the voltage generated at the secondary coil NS2 of the transformer T1 decreases. When the load current I0 increases, the transistor TR1 becomes completely nonconductive. Thus, no voltage is produced at the secondary coil NS2, and the transistor TR2 becomes nonconductive. Since the maximum of the load current I0 is I0, the power consumption of the overcurrent detecting resistor R3 will not increase. When the load becomes normal, it can be automatically reset.
JP18694280A 1980-12-26 1980-12-26 Protecting circuit for booster type converter Pending JPS57110077A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP18694280A JPS57110077A (en) 1980-12-26 1980-12-26 Protecting circuit for booster type converter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP18694280A JPS57110077A (en) 1980-12-26 1980-12-26 Protecting circuit for booster type converter

Publications (1)

Publication Number Publication Date
JPS57110077A true JPS57110077A (en) 1982-07-08

Family

ID=16197413

Family Applications (1)

Application Number Title Priority Date Filing Date
JP18694280A Pending JPS57110077A (en) 1980-12-26 1980-12-26 Protecting circuit for booster type converter

Country Status (1)

Country Link
JP (1) JPS57110077A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59230464A (en) * 1983-06-14 1984-12-25 Toshiba Corp Rectifying power source
JPS63274363A (en) * 1987-04-28 1988-11-11 Toko Inc Switching power circuit

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59230464A (en) * 1983-06-14 1984-12-25 Toshiba Corp Rectifying power source
JPS63274363A (en) * 1987-04-28 1988-11-11 Toko Inc Switching power circuit

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