JPS5491741A - Control circuit for ac power semiconductor switch - Google Patents

Control circuit for ac power semiconductor switch

Info

Publication number
JPS5491741A
JPS5491741A JP15950977A JP15950977A JPS5491741A JP S5491741 A JPS5491741 A JP S5491741A JP 15950977 A JP15950977 A JP 15950977A JP 15950977 A JP15950977 A JP 15950977A JP S5491741 A JPS5491741 A JP S5491741A
Authority
JP
Japan
Prior art keywords
voltage
triac
current
characteristic element
value
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
JP15950977A
Other languages
Japanese (ja)
Inventor
Shunji Miura
Tatsuo Kamata
Tomoyuki Okubo
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.)
Fuji Electric Co Ltd
Original Assignee
Fuji 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 Fuji Electric Co Ltd filed Critical Fuji Electric Co Ltd
Priority to JP15950977A priority Critical patent/JPS5491741A/en
Publication of JPS5491741A publication Critical patent/JPS5491741A/en
Pending legal-status Critical Current

Links

Landscapes

  • Control Of Voltage And Current In General (AREA)

Abstract

PURPOSE: To operate a characteristic element at or near the zero point of power voltage by using the characteristic element which has the voltage and current characteristics to apply current in accordance with the polarity of applied AC voltage when the absolute value of the applied AC voltage is smaller than its prescribed value.
CONSTITUTION: Characteristic element A is connected to the TRIAC gate. Ac and DC voltages are applied between AC1 and AC2 and between P and N, respectively. When LED1 emits light, light variable resistance element PC receives light input and goes into low resistance status. If the characteristic element A operates within the range of -Vo to +Vo in this case, current is applied to the TRIAC gate electrode G1 and TRIAC is ignited, then current is applied to a load in accordance with the polarity of input AC voltage. As a result, only when the instantaneous value of the AC voltage takes any value of -Vo to +Vo, i.e. it does the zero point or the point nearer, the designed purpose can be attained by turning on TRIAC.
COPYRIGHT: (C)1979,JPO&Japio
JP15950977A 1977-12-29 1977-12-29 Control circuit for ac power semiconductor switch Pending JPS5491741A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15950977A JPS5491741A (en) 1977-12-29 1977-12-29 Control circuit for ac power semiconductor switch

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15950977A JPS5491741A (en) 1977-12-29 1977-12-29 Control circuit for ac power semiconductor switch

Publications (1)

Publication Number Publication Date
JPS5491741A true JPS5491741A (en) 1979-07-20

Family

ID=15695320

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15950977A Pending JPS5491741A (en) 1977-12-29 1977-12-29 Control circuit for ac power semiconductor switch

Country Status (1)

Country Link
JP (1) JPS5491741A (en)

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