JPS5481766A - Commutation circuit of thyristor - Google Patents
Commutation circuit of thyristorInfo
- Publication number
- JPS5481766A JPS5481766A JP15025977A JP15025977A JPS5481766A JP S5481766 A JPS5481766 A JP S5481766A JP 15025977 A JP15025977 A JP 15025977A JP 15025977 A JP15025977 A JP 15025977A JP S5481766 A JPS5481766 A JP S5481766A
- Authority
- JP
- Japan
- Prior art keywords
- time
- scr2
- scr1
- scr
- circuit
- 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
- Thyristor Switches And Gates (AREA)
- Power Conversion In General (AREA)
Abstract
PURPOSE: To enable a simply-constituted circuit to be used for high-speed switching even in case of a SCR with a long turn-off time.
CONSTITUTION: When sub-SCR2 is turned ON at t1 before load current I0 of main SCR1 is cut off, I0 commutates to SCR2 since the voltage drop of the SCR1 circuit is larger as much as resistance R12 is effective, and SCR1 becomes below a holding current and turns OFF, so that all I0 will flow to SCR2. With auxiliary commutaion SCR3 turned ON at t2 next, the charged voltage of commutation capacity 5 is applied as a reverse bias to SCRs 1 and 2, thereby turning OFF SCR2. At this time, SCR1 is OFF and I0 is cut off. By this circuit, main SCR employs a large- power one with large current capacity and long turn-off time and sub-SCR employs an intermediate or small power one with small capacity and short turn-off time, so that a large-power and short turn-off time SCR can be obtained equivalently.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15025977A JPS5481766A (en) | 1977-12-13 | 1977-12-13 | Commutation circuit of thyristor |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15025977A JPS5481766A (en) | 1977-12-13 | 1977-12-13 | Commutation circuit of thyristor |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5481766A true JPS5481766A (en) | 1979-06-29 |
Family
ID=15493020
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP15025977A Pending JPS5481766A (en) | 1977-12-13 | 1977-12-13 | Commutation circuit of thyristor |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5481766A (en) |
-
1977
- 1977-12-13 JP JP15025977A patent/JPS5481766A/en active Pending
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