JPS5488057A - Turn-off circuit of gate turn-off thyristor - Google Patents
Turn-off circuit of gate turn-off thyristorInfo
- Publication number
- JPS5488057A JPS5488057A JP15560477A JP15560477A JPS5488057A JP S5488057 A JPS5488057 A JP S5488057A JP 15560477 A JP15560477 A JP 15560477A JP 15560477 A JP15560477 A JP 15560477A JP S5488057 A JPS5488057 A JP S5488057A
- Authority
- JP
- Japan
- Prior art keywords
- capacitor
- turn
- circuit
- scr
- snubber
- 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)
- Thyristor Switches And Gates (AREA)
Abstract
PURPOSE: To constitute a simple circuit which can turn off surely, by adding a reverse current supply circuit, which utilizes a snubber circuit provided with a gate turn-off SCR, to a turn-off circuit which supplies the off current.
CONSTITUTION: In gate turn-off SCR 1 where a snubber circuit obtained by connecting snubber capacitor 4 in series to a parallel circuit of snubber diode 2 and snubber resistance 3 is connected between the anode and the cathode, a series circuit of reverse current supplying SCR 21 and reverse current supplying capacitor 22 is connected in parallel to the snubber circuit. Further, auxiliary charging power source 23, which gives charge to capacitor 22, and auxiliary charging impedance 24 are connected in parallel to capacitor 22. Then, the load current during the turn- off period of SCR 1 is made invariable; and after SCR 1 is turned off, approximately all load current is flown to SCR 21, capacitor 22 and capacitor 4 to charge capacitor 22. When the voltage becomes zero, diode 2 is made conductive to turn off SCR 21, and capacitor 22 is charged by power source 23 again to increase the voltage capacitor 4 to DC power source voltage Vd.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15560477A JPS5488057A (en) | 1977-12-26 | 1977-12-26 | Turn-off circuit of gate turn-off thyristor |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15560477A JPS5488057A (en) | 1977-12-26 | 1977-12-26 | Turn-off circuit of gate turn-off thyristor |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5488057A true JPS5488057A (en) | 1979-07-12 |
Family
ID=15609646
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP15560477A Pending JPS5488057A (en) | 1977-12-26 | 1977-12-26 | Turn-off circuit of gate turn-off thyristor |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5488057A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5935561A (en) * | 1982-08-23 | 1984-02-27 | Toyo Electric Mfg Co Ltd | Method and device for controlling self-extinguishing type thyristor |
CN106452039A (en) * | 2016-10-12 | 2017-02-22 | 长沙群瑞电子科技有限公司 | Alternating-current soft start power supply device |
-
1977
- 1977-12-26 JP JP15560477A patent/JPS5488057A/en active Pending
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5935561A (en) * | 1982-08-23 | 1984-02-27 | Toyo Electric Mfg Co Ltd | Method and device for controlling self-extinguishing type thyristor |
JPH041581B2 (en) * | 1982-08-23 | 1992-01-13 | Toyo Electric Mfg Co Ltd | |
CN106452039A (en) * | 2016-10-12 | 2017-02-22 | 长沙群瑞电子科技有限公司 | Alternating-current soft start power supply device |
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