JPS5781727A - Snubber circuit of gate turn-off thyristor - Google Patents

Snubber circuit of gate turn-off thyristor

Info

Publication number
JPS5781727A
JPS5781727A JP15701480A JP15701480A JPS5781727A JP S5781727 A JPS5781727 A JP S5781727A JP 15701480 A JP15701480 A JP 15701480A JP 15701480 A JP15701480 A JP 15701480A JP S5781727 A JPS5781727 A JP S5781727A
Authority
JP
Japan
Prior art keywords
gto1
turn
diode
thyristor
overvoltage
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
JP15701480A
Other languages
Japanese (ja)
Inventor
Hiroshi Fukui
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP15701480A priority Critical patent/JPS5781727A/en
Publication of JPS5781727A publication Critical patent/JPS5781727A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/08—Modifications for protecting switching circuit against overcurrent or overvoltage
    • H03K17/081—Modifications for protecting switching circuit against overcurrent or overvoltage without feedback from the output circuit to the control circuit
    • H03K17/0814—Modifications for protecting switching circuit against overcurrent or overvoltage without feedback from the output circuit to the control circuit by measures taken in the output circuit
    • H03K17/08144—Modifications for protecting switching circuit against overcurrent or overvoltage without feedback from the output circuit to the control circuit by measures taken in the output circuit in thyristor switches

Abstract

PURPOSE:To suppress the overvoltage at the early time of turn-ff, by using a diode to which the platinum is doped for an overvoltage absorbing circuit of a gate turn-off thyristor. CONSTITUTION:A capacitor 2 is connected in series to a parallel circuit of a diode 4 and a resistance 3 to form an overvoltage absorbing circuit. This absorbing circuit is connected in parallel to a gate turn-off thyristor GTO1. When the GTO1 is turned on, the discharged current of the capacitor 2 passes through the resistance 3 to reduce the discharged current value during the turn-on. While the load current passes through the diode 4 to charge the capacitor 2 when the GTO1 is turned off. Thus the voltage increase factor is suppressed for the GTO1. A diode to which the platinum is doped has a low degree of the forward recovery and has a low level of the generated voltage when it is turned on. Accordingly the overvoltage of the GTO1 is suppressed at the early time of turn- off.
JP15701480A 1980-11-10 1980-11-10 Snubber circuit of gate turn-off thyristor Pending JPS5781727A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15701480A JPS5781727A (en) 1980-11-10 1980-11-10 Snubber circuit of gate turn-off thyristor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15701480A JPS5781727A (en) 1980-11-10 1980-11-10 Snubber circuit of gate turn-off thyristor

Publications (1)

Publication Number Publication Date
JPS5781727A true JPS5781727A (en) 1982-05-21

Family

ID=15640288

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15701480A Pending JPS5781727A (en) 1980-11-10 1980-11-10 Snubber circuit of gate turn-off thyristor

Country Status (1)

Country Link
JP (1) JPS5781727A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4678932A (en) * 1985-04-30 1987-07-07 Mitsubishi Denki Kabushiki Kaisha Snubber circuit for GTO thyristor

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4678932A (en) * 1985-04-30 1987-07-07 Mitsubishi Denki Kabushiki Kaisha Snubber circuit for GTO thyristor

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