JPS5586374A - Gate phase control circuit for thyristor - Google Patents
Gate phase control circuit for thyristorInfo
- Publication number
- JPS5586374A JPS5586374A JP16040478A JP16040478A JPS5586374A JP S5586374 A JPS5586374 A JP S5586374A JP 16040478 A JP16040478 A JP 16040478A JP 16040478 A JP16040478 A JP 16040478A JP S5586374 A JPS5586374 A JP S5586374A
- Authority
- JP
- Japan
- Prior art keywords
- thyristor
- voltage
- gate
- zener
- diode
- 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
Abstract
PURPOSE: To prevent the faulty ignition of a bidirectional triode thyristor, by connecting a phototransistor between the gate of the thyristor and a gate power source and opening or closing the phototransistor synchronously with AC power applied to terminals of the thyristor.
CONSTITUTION: A full-wave-rectified voltage synchronized with the voltage of AC power 1 is supplied from a full wave rectification circuit B to a series circuit comprising a Zener diode 19, a light emitting diode of a photocoupler 21 and a resistor 20. When the full-wave-rectified voltage exceeds the Zener voltage of the Zener diode 19, this diode is closed and a current shown in (d) of Fig. flows through the light emitting diode of the photocoupler 21. A float angle θ, at which a gate signal which is supplied to the gate of a triode AC switch 3 before a voltage applied to the switch becomes zero is cut off, depends on the Zener voltage of the Zener diode 19 and the resistance of the resistor 20.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP16040478A JPS5586374A (en) | 1978-12-25 | 1978-12-25 | Gate phase control circuit for thyristor |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP16040478A JPS5586374A (en) | 1978-12-25 | 1978-12-25 | Gate phase control circuit for thyristor |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5586374A true JPS5586374A (en) | 1980-06-30 |
Family
ID=15714198
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP16040478A Pending JPS5586374A (en) | 1978-12-25 | 1978-12-25 | Gate phase control circuit for thyristor |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5586374A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57206930A (en) * | 1981-06-15 | 1982-12-18 | Matsushita Electric Works Ltd | Phase controlling circuit |
-
1978
- 1978-12-25 JP JP16040478A patent/JPS5586374A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57206930A (en) * | 1981-06-15 | 1982-12-18 | Matsushita Electric Works Ltd | Phase controlling circuit |
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