JPS55147972A - Method and circuit for protecting overcurrent of gate turn-off thyristor - Google Patents

Method and circuit for protecting overcurrent of gate turn-off thyristor

Info

Publication number
JPS55147972A
JPS55147972A JP5600479A JP5600479A JPS55147972A JP S55147972 A JPS55147972 A JP S55147972A JP 5600479 A JP5600479 A JP 5600479A JP 5600479 A JP5600479 A JP 5600479A JP S55147972 A JPS55147972 A JP S55147972A
Authority
JP
Japan
Prior art keywords
gate
signal
gto
circuit
thyristor
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
JP5600479A
Other languages
Japanese (ja)
Inventor
Yoshimoto Tamura
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP5600479A priority Critical patent/JPS55147972A/en
Publication of JPS55147972A publication Critical patent/JPS55147972A/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

Landscapes

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

Abstract

PURPOSE:To improve the utility rate of a GTO by discriminating the on and off state of the GTO when abnormal overcurrent occurs at the GTO to effectively maintain an on-off setting signal when the abnormal overcurrent occurs during the output period. CONSTITUTION:A gate turn-off thyristor (GTO) is controlled on or off by a gate on signal C or a gate off signal D generated on the basis of a clock signal A. An inverter 54 is provided at the final stage of a gate off circuit. An abnormal overcurrent signal B is applied through an inverter 56 to the first logic circuit consisting of a NAND gate 58 for outputting a stop signal to a gate on circuit and the second logic circuit consisting of a NAND gate 60 for outputting a stop signal to a gate off circuit. When an abnormal overcurrent occurs, the on or off state of the GTO is discriminated by the NAND gate 58, 60 to conduct the control operation in response to the respective states.
JP5600479A 1979-05-08 1979-05-08 Method and circuit for protecting overcurrent of gate turn-off thyristor Pending JPS55147972A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5600479A JPS55147972A (en) 1979-05-08 1979-05-08 Method and circuit for protecting overcurrent of gate turn-off thyristor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5600479A JPS55147972A (en) 1979-05-08 1979-05-08 Method and circuit for protecting overcurrent of gate turn-off thyristor

Publications (1)

Publication Number Publication Date
JPS55147972A true JPS55147972A (en) 1980-11-18

Family

ID=13014907

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5600479A Pending JPS55147972A (en) 1979-05-08 1979-05-08 Method and circuit for protecting overcurrent of gate turn-off thyristor

Country Status (1)

Country Link
JP (1) JPS55147972A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6130969A (en) * 1984-07-23 1986-02-13 Hitachi Ltd Inverter device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6130969A (en) * 1984-07-23 1986-02-13 Hitachi Ltd Inverter device

Similar Documents

Publication Publication Date Title
JPS55147972A (en) Method and circuit for protecting overcurrent of gate turn-off thyristor
JPS5728575A (en) Control system of inverter
JPS5632824A (en) Pulse eliminating circuit
JPS55157022A (en) Output circuit for microcomputer
JPS57164334A (en) Operating device
JPS55164902A (en) Malfunction preventing method for automatic control unit
FR2400286A1 (en) AC switching system with logic circuit - has threshold circuit and turn-on signal shaper in front of and behind logic circuit
JPS5671478A (en) Gate interrupting system for thyristor type inverter
JPS56162978A (en) Controlling circuit for inverter
JPS57129173A (en) Power converter
JPS57112129A (en) Latch circuit
JPS5556470A (en) Power abnormality detecting circuit
JPS5579523A (en) Flip-flop circuit
JPS57126274A (en) Protecting system for converter
JPS57126271A (en) Protecting method for gate turn-off thyristor power converter
JPS531821A (en) Dc-ac converter
JPS56145412A (en) Interruption signal receiving circuit
JPS52107740A (en) Multiple control system
JPS6453620A (en) Flip-flop circuit
JPS5437635A (en) Power control system
JPS57153567A (en) Inverter controller
JPS5793721A (en) Schmitt circuit
JPS5668272A (en) Power source
JPS53101643A (en) Automatically and selectively interrupting system
JPS54150567A (en) Speed reduction limit switch check system for numerical controlled machine tool