JPS5491741A - Control circuit for ac power semiconductor switch - Google Patents
Control circuit for ac power semiconductor switchInfo
- 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
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
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) |
-
1977
- 1977-12-29 JP JP15950977A patent/JPS5491741A/en active Pending
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