JPS5646660A - Circuit for detecting synchronizing signal - Google Patents

Circuit for detecting synchronizing signal

Info

Publication number
JPS5646660A
JPS5646660A JP12207679A JP12207679A JPS5646660A JP S5646660 A JPS5646660 A JP S5646660A JP 12207679 A JP12207679 A JP 12207679A JP 12207679 A JP12207679 A JP 12207679A JP S5646660 A JPS5646660 A JP S5646660A
Authority
JP
Japan
Prior art keywords
circuit
output
signal
synchronizing
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.)
Granted
Application number
JP12207679A
Other languages
Japanese (ja)
Other versions
JPS6011544B2 (en
Inventor
Hiroshi Ikeda
Haruhisa Inoguchi
Takami Sakai
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 JP12207679A priority Critical patent/JPS6011544B2/en
Publication of JPS5646660A publication Critical patent/JPS5646660A/en
Publication of JPS6011544B2 publication Critical patent/JPS6011544B2/en
Expired 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)
  • Rectifiers (AREA)

Abstract

PURPOSE:To constantly and safely protect a thyristor converting device by switching a synchronizing detection circuit to a low-speed synchronizing detection circuit or a synchronizing signal generating circuit when an AC synchronizing signal has been lost. CONSTITUTION:The output of an AC sunchronizing signal loss detecting circuit 15 is ''0'' at the normal time, ''1'' at the losing time, and the output signal of a low-speed synchronizing detecting circuit 17 is ignored by an inhibiting element 18-1. On the other hand, since the output of the inverter element 17 is ''1'', the output signal of a high-speed synchronizing detection circuit 6 is imparted through an inhibit element 18-2, and an OR element 19 to a phase control circuit 7, through which one ignition command of each thyristor is imparted. The circuit 15 detects the loss of an AC synchronizing signal, and when its output becomes ''1'', the output of the element 17 becomes ''0'', the output of the circuit 6 is ignored by an element 18-2, the output signal from the circuit 17 is inputted to the circuit 7 through the elements 18-1 and 19, and when a normal state is restored, the device assumes the original state, whereby the thyristor conversion device can be safely protected.
JP12207679A 1979-09-25 1979-09-25 Synchronous signal detection circuit Expired JPS6011544B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12207679A JPS6011544B2 (en) 1979-09-25 1979-09-25 Synchronous signal detection circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12207679A JPS6011544B2 (en) 1979-09-25 1979-09-25 Synchronous signal detection circuit

Publications (2)

Publication Number Publication Date
JPS5646660A true JPS5646660A (en) 1981-04-27
JPS6011544B2 JPS6011544B2 (en) 1985-03-26

Family

ID=14827050

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12207679A Expired JPS6011544B2 (en) 1979-09-25 1979-09-25 Synchronous signal detection circuit

Country Status (1)

Country Link
JP (1) JPS6011544B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6059903A (en) * 1983-09-09 1985-04-06 Hitachi Ltd Controller of ac electric railcar
JPH01101175U (en) * 1987-12-24 1989-07-07

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6059903A (en) * 1983-09-09 1985-04-06 Hitachi Ltd Controller of ac electric railcar
JPH01101175U (en) * 1987-12-24 1989-07-07

Also Published As

Publication number Publication date
JPS6011544B2 (en) 1985-03-26

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