JPS5487161A - Control circuit for ac power semiconductor switch device - Google Patents
Control circuit for ac power semiconductor switch deviceInfo
- Publication number
- JPS5487161A JPS5487161A JP15534977A JP15534977A JPS5487161A JP S5487161 A JPS5487161 A JP S5487161A JP 15534977 A JP15534977 A JP 15534977A JP 15534977 A JP15534977 A JP 15534977A JP S5487161 A JPS5487161 A JP S5487161A
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- control circuit
- constitution
- semiconductor switch
- terminals
- 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
- Power Conversion In General (AREA)
Abstract
PURPOSE: To simplify the constitution of semiconductor switch control circuit, by using the negative resistance element which can flow current at the applied voltage lower than a value but does not flow current at the voltage higher than a value.
CONSTITUTION: When AC voltage is fed between the terminal AC1 and AC2, the voltage rectified with diodes D2 to D5 is applied to the negative resistance element A. Further, the element A consists of the NPN transistor TR1, two P channel J- FET1 and FET2 and photo vafiable resistor element PC, and it is conductive when the voltage fed between the terminals A1 and A2 is low and not conductive if it higher, acting like the detection element near zero voltage of AC voltage. When the LED photo coupled to the element pC is illuminated, the element PC is at l low resistance and the element A is operative. One of SCR's is triggered with the gate G1 or G2 of SCRFR1 and FR2 in anti-parallel connection. Accordingly, current flows to the load between the terminals AC1 and AC2. Thus, the control circuit of a simple circuit constitution can be established.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15534977A JPS5487161A (en) | 1977-12-23 | 1977-12-23 | Control circuit for ac power semiconductor switch device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15534977A JPS5487161A (en) | 1977-12-23 | 1977-12-23 | Control circuit for ac power semiconductor switch device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5487161A true JPS5487161A (en) | 1979-07-11 |
Family
ID=15603938
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15534977A Pending JPS5487161A (en) | 1977-12-23 | 1977-12-23 | Control circuit for ac power semiconductor switch device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5487161A (en) |
-
1977
- 1977-12-23 JP JP15534977A patent/JPS5487161A/en active Pending
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