JPS5688668A - Protective device for gate turn-off thyristor - Google Patents

Protective device for gate turn-off thyristor

Info

Publication number
JPS5688668A
JPS5688668A JP16016979A JP16016979A JPS5688668A JP S5688668 A JPS5688668 A JP S5688668A JP 16016979 A JP16016979 A JP 16016979A JP 16016979 A JP16016979 A JP 16016979A JP S5688668 A JPS5688668 A JP S5688668A
Authority
JP
Japan
Prior art keywords
thyristor
voltage
gate
breakdown
time
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
JP16016979A
Other languages
Japanese (ja)
Other versions
JPS6258218B2 (en
Inventor
Minami Takeuchi
Katsuhiko Takigami
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric 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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP16016979A priority Critical patent/JPS5688668A/en
Priority to US06/212,244 priority patent/US4392175A/en
Priority to EP80107645A priority patent/EP0032552B1/en
Priority to DE8080107645T priority patent/DE3067586D1/en
Publication of JPS5688668A publication Critical patent/JPS5688668A/en
Publication of JPS6258218B2 publication Critical patent/JPS6258218B2/ja
Granted 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Thyristor Switches And Gates (AREA)
  • Protection Of Static Devices (AREA)
  • Dc-Dc Converters (AREA)
  • Power Conversion In General (AREA)

Abstract

PURPOSE:To foresee the breakdown of a gate turn-OFF thyristor by detecting the decreased voltage initially of a voltage between the anode and the cathode of the thyristor at the gate turning OFF time. CONSTITUTION:A voltage Va between the anode and the cathode of a gate turn- OFF thyristor 13 is detected at the gate turning OFF time, and after the voltage Va is risen, the difference voltage DELTAVa between the voltage Va(t1) when the rising rate initially becomes zero and the voltage Va(t2)emerging immediately after the time t1 is detected. When the ratio of the Va(t1) and the DELTAa falls within a predetermined range, an output signal Z is outputted from a discriminating circuit 17 to a gate current supply circuit 15, the gate current supply is stopped, and it can prevent the breakdown of the thyristor, thereby preventing the breakdown of the gate turning-OFF thyristor.
JP16016979A 1979-12-10 1979-12-10 Protective device for gate turn-off thyristor Granted JPS5688668A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP16016979A JPS5688668A (en) 1979-12-10 1979-12-10 Protective device for gate turn-off thyristor
US06/212,244 US4392175A (en) 1979-12-10 1980-12-02 Protecting device for a gate turn-off thyristor
EP80107645A EP0032552B1 (en) 1979-12-10 1980-12-04 Protecting device for a gate turn-off thyristor
DE8080107645T DE3067586D1 (en) 1979-12-10 1980-12-04 Protecting device for a gate turn-off thyristor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16016979A JPS5688668A (en) 1979-12-10 1979-12-10 Protective device for gate turn-off thyristor

Publications (2)

Publication Number Publication Date
JPS5688668A true JPS5688668A (en) 1981-07-18
JPS6258218B2 JPS6258218B2 (en) 1987-12-04

Family

ID=15709338

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16016979A Granted JPS5688668A (en) 1979-12-10 1979-12-10 Protective device for gate turn-off thyristor

Country Status (1)

Country Link
JP (1) JPS5688668A (en)

Also Published As

Publication number Publication date
JPS6258218B2 (en) 1987-12-04

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