JPS56148173A - Protecting device of forward overcurrent in optical thyristor - Google Patents

Protecting device of forward overcurrent in optical thyristor

Info

Publication number
JPS56148173A
JPS56148173A JP4919680A JP4919680A JPS56148173A JP S56148173 A JPS56148173 A JP S56148173A JP 4919680 A JP4919680 A JP 4919680A JP 4919680 A JP4919680 A JP 4919680A JP S56148173 A JPS56148173 A JP S56148173A
Authority
JP
Japan
Prior art keywords
optical thyristor
light
voltages
constant voltage
gate terminal
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
JP4919680A
Other languages
Japanese (ja)
Inventor
Ryuji Iyotani
Hisao Amano
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 JP4919680A priority Critical patent/JPS56148173A/en
Publication of JPS56148173A publication Critical patent/JPS56148173A/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
    • H02M1/092—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 the control signals being transmitted optically

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Power Conversion In General (AREA)
  • Electronic Switches (AREA)

Abstract

PURPOSE:To protect the optical thyristor connected in series from the overcurrent by a method wherein the optical thyristor is fed both signals of light and electricity. CONSTITUTION:When voltages at both ends of the optical thyristor 1 are turned to operating voltages (s sum of the operating voltages of a constant voltage element 12 and a negative resistance element 13), the negative resistance element 13 brakes over to cause the current to rapidly flow. The currents flow to a light emission element 2 to cause it to luminesce, and when the sum of the terminal voltages of the light emission element 2 and a resistor 15 exceeds the operating voltage of a constant voltage element 14, the currents flow to the constant voltage element 14 also, and those currents are fed to a gate terminal of the optical thyristor through a resistor 16. That is, with the overvoltages, the light emitted from the light emission element 2 runs to the gate terminal of the light and the same currents flow to the gate terminal for the electrical signals.
JP4919680A 1980-04-16 1980-04-16 Protecting device of forward overcurrent in optical thyristor Pending JPS56148173A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4919680A JPS56148173A (en) 1980-04-16 1980-04-16 Protecting device of forward overcurrent in optical thyristor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4919680A JPS56148173A (en) 1980-04-16 1980-04-16 Protecting device of forward overcurrent in optical thyristor

Publications (1)

Publication Number Publication Date
JPS56148173A true JPS56148173A (en) 1981-11-17

Family

ID=12824244

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4919680A Pending JPS56148173A (en) 1980-04-16 1980-04-16 Protecting device of forward overcurrent in optical thyristor

Country Status (1)

Country Link
JP (1) JPS56148173A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0073461A2 (en) * 1981-09-01 1983-03-09 Fuji Electric Co. Ltd. Overvoltage protection for an optically controlled thyristor
CN103179712A (en) * 2011-12-23 2013-06-26 何曙光 Negative resistance compensating circuit

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0073461A2 (en) * 1981-09-01 1983-03-09 Fuji Electric Co. Ltd. Overvoltage protection for an optically controlled thyristor
EP0073461A3 (en) * 1981-09-01 1984-01-11 Fuji Electric Co. Ltd. Overvoltage protection for an optically controlled thyristor
CN103179712A (en) * 2011-12-23 2013-06-26 何曙光 Negative resistance compensating circuit

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