JPS56139074A - Switching circuit - Google Patents

Switching circuit

Info

Publication number
JPS56139074A
JPS56139074A JP4141980A JP4141980A JPS56139074A JP S56139074 A JPS56139074 A JP S56139074A JP 4141980 A JP4141980 A JP 4141980A JP 4141980 A JP4141980 A JP 4141980A JP S56139074 A JPS56139074 A JP S56139074A
Authority
JP
Japan
Prior art keywords
gate
output
trigger element
high level
circuit
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
JP4141980A
Other languages
Japanese (ja)
Other versions
JPH0253969B2 (en
Inventor
Yasumasa Namikoshi
Katsuyuki Kiyozumi
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.)
Panasonic Electric Works Co Ltd
Original Assignee
Matsushita Electric Works 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 Matsushita Electric Works Ltd filed Critical Matsushita Electric Works Ltd
Priority to JP4141980A priority Critical patent/JPS56139074A/en
Publication of JPS56139074A publication Critical patent/JPS56139074A/en
Publication of JPH0253969B2 publication Critical patent/JPH0253969B2/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
    • H02M5/00—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases
    • H02M5/02—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc
    • H02M5/04—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc by static converters
    • H02M5/22—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M5/25—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a thyratron or thyristor type requiring extinguishing means
    • H02M5/257—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a thyratron or thyristor type requiring extinguishing means using semiconductor devices only

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Circuit Arrangement For Electric Light Sources In General (AREA)
  • Power Conversion In General (AREA)
  • Thyristor Switches And Gates (AREA)

Abstract

PURPOSE:To simplify a trigger circuit in a switching circuit by commonly connecting one end of a gate trigger element to one output end of a DC power source circuit, and operating a logic circuit element in response to the gate trigger element to generate a gate signal. CONSTITUTION:When a high level signal is produced from a control circuit 19, the output of an AND gate 17 becomes high level, a transistor 22 is conducted to thus conduct a gate trigger element 2. Accordingly, the output of an OR gate 14 becomes low level to decrease the output of the AND gate 17 and to turn OFF the transistor 22. When the gate trigger element 2 is turned OFF at the zero cross position of an AC power source 1, the output of the OR gate 14 become high level, one input of the AND gate 17 gradually increases. When it reaches a predetermined level, the output of the AND gate 17 becomes high level to conduct the transistor 22 and thereby conduct the gate trigger element 2.
JP4141980A 1980-03-31 1980-03-31 Switching circuit Granted JPS56139074A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4141980A JPS56139074A (en) 1980-03-31 1980-03-31 Switching circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4141980A JPS56139074A (en) 1980-03-31 1980-03-31 Switching circuit

Publications (2)

Publication Number Publication Date
JPS56139074A true JPS56139074A (en) 1981-10-30
JPH0253969B2 JPH0253969B2 (en) 1990-11-20

Family

ID=12607828

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4141980A Granted JPS56139074A (en) 1980-03-31 1980-03-31 Switching circuit

Country Status (1)

Country Link
JP (1) JPS56139074A (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5478470A (en) * 1977-12-02 1979-06-22 Mitsubishi Electric Corp Ignition equipment for dc breaker

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5478470A (en) * 1977-12-02 1979-06-22 Mitsubishi Electric Corp Ignition equipment for dc breaker

Also Published As

Publication number Publication date
JPH0253969B2 (en) 1990-11-20

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