JPS5491742A - Control circuit for ac power semiconductor switch - Google Patents
Control circuit for ac power semiconductor switchInfo
- 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
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
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) |
-
1977
- 1977-12-29 JP JP15951077A patent/JPS5491742A/en active Pending
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