JPS57151268A - Overvoltage protecting circuit for gto thyristor - Google Patents

Overvoltage protecting circuit for gto thyristor

Info

Publication number
JPS57151268A
JPS57151268A JP3596681A JP3596681A JPS57151268A JP S57151268 A JPS57151268 A JP S57151268A JP 3596681 A JP3596681 A JP 3596681A JP 3596681 A JP3596681 A JP 3596681A JP S57151268 A JPS57151268 A JP S57151268A
Authority
JP
Japan
Prior art keywords
thyristor
capacitor
circuit
time
charging
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
JP3596681A
Other languages
Japanese (ja)
Inventor
Masami Ichijo
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.)
Fuji Electric Co Ltd
Original Assignee
Fuji Electric Co Ltd
Fuji Electric Manufacturing Co 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 Fuji Electric Co Ltd, Fuji Electric Manufacturing Co Ltd filed Critical Fuji Electric Co Ltd
Priority to JP3596681A priority Critical patent/JPS57151268A/en
Publication of JPS57151268A publication Critical patent/JPS57151268A/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
    • H02M1/00—Details of apparatus for conversion
    • H02M1/08—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters
    • H02M1/088—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters for the simultaneous control of series or parallel connected semiconductor devices

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Power Conversion In General (AREA)
  • Thyristor Switches And Gates (AREA)

Abstract

PURPOSE:To efficiently protect the overvoltage at the overloading time by connecting a charging and discharging circuit having a thyristor and an auxiliary capacitor in parallel with the snubber circuit of a GTO thyristor and firing the thyristor at the breaking time. CONSTITUTION:A charging and discharging circuit having a resistor 12 and a capacitor 14 is connected between the anode and the cathode of a GTO thyristor in a snubber circuit, and the charging and discharging circuit connected in series with a thyristor 18 and an auxiliary capacitor 20 is connected in parallel with the snubber circuit. The thyristor 18 is not fired at the normally breaking time when the anode current of the thyristor 10 is small, and is fired when the anode current is increased at the overloading time, thereby operating the capacitor 20. Accordingly, the overvoltage protection can be performed at the breaking time with the parallel capacity of the capacitor 14 and the capacitor 10 at the overloading time, thereby minimizing the loss of the circuit.
JP3596681A 1981-03-14 1981-03-14 Overvoltage protecting circuit for gto thyristor Pending JPS57151268A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3596681A JPS57151268A (en) 1981-03-14 1981-03-14 Overvoltage protecting circuit for gto thyristor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3596681A JPS57151268A (en) 1981-03-14 1981-03-14 Overvoltage protecting circuit for gto thyristor

Publications (1)

Publication Number Publication Date
JPS57151268A true JPS57151268A (en) 1982-09-18

Family

ID=12456684

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3596681A Pending JPS57151268A (en) 1981-03-14 1981-03-14 Overvoltage protecting circuit for gto thyristor

Country Status (1)

Country Link
JP (1) JPS57151268A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58218866A (en) * 1982-05-20 1983-12-20 Internatl Rectifier Corp Japan Ltd Snubber circuit for gate-turnoff thyristor for power
JPS5937881A (en) * 1982-08-25 1984-03-01 Toshiba Corp Protecting device for thyristor

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58218866A (en) * 1982-05-20 1983-12-20 Internatl Rectifier Corp Japan Ltd Snubber circuit for gate-turnoff thyristor for power
JPS5937881A (en) * 1982-08-25 1984-03-01 Toshiba Corp Protecting device for thyristor
JPH033462B2 (en) * 1982-08-25 1991-01-18 Tokyo Shibaura Electric Co

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