JPS5491742A - Control circuit for ac power semiconductor switch - Google Patents

Control circuit for ac power semiconductor switch

Info

Publication number
JPS5491742A
JPS5491742A JP15951077A JP15951077A JPS5491742A JP S5491742 A JPS5491742 A JP S5491742A JP 15951077 A JP15951077 A JP 15951077A JP 15951077 A JP15951077 A JP 15951077A JP S5491742 A JPS5491742 A JP S5491742A
Authority
JP
Japan
Prior art keywords
voltage
current
polarity
accordance
characteristic element
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
JP15951077A
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 JP15951077A priority Critical patent/JPS5491742A/en
Publication of JPS5491742A publication Critical patent/JPS5491742A/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 caracteristic 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 to apply current in accordance with the polarity of applied voltage when it does not exceed its prescribed value and not to apply current when it exceeds the prescribed value is connected to light receiving element PC. When AC voltage is applied between AC1 and AC2, this voltage is applied to both ends of TRIAC and the characteristic element A. If DC voltage is not applied between P and N in this case, TRIAC goes OFF and current is not applied to a load. On the contrary, if voltage is applied between P and N, PC2 receives light input and goes into low resistance status. When the characteristic element A operates within the range of -Vo to +Vo, current is applied to the TRIAC gate electrode G3 and ignites it. Then current is applied to the load in accordance with the polarity of input AC voltage.
COPYRIGHT: (C)1979,JPO&Japio
JP15951077A 1977-12-29 1977-12-29 Control circuit for ac power semiconductor switch Pending JPS5491742A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15951077A JPS5491742A (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
JP15951077A JPS5491742A (en) 1977-12-29 1977-12-29 Control circuit for ac power semiconductor switch

Publications (1)

Publication Number Publication Date
JPS5491742A true JPS5491742A (en) 1979-07-20

Family

ID=15695341

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15951077A Pending JPS5491742A (en) 1977-12-29 1977-12-29 Control circuit for ac power semiconductor switch

Country Status (1)

Country Link
JP (1) JPS5491742A (en)

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