JPS5526071A - Digital pulse phase shifter - Google Patents
Digital pulse phase shifterInfo
- Publication number
- JPS5526071A JPS5526071A JP9909378A JP9909378A JPS5526071A JP S5526071 A JPS5526071 A JP S5526071A JP 9909378 A JP9909378 A JP 9909378A JP 9909378 A JP9909378 A JP 9909378A JP S5526071 A JPS5526071 A JP S5526071A
- Authority
- JP
- Japan
- Prior art keywords
- control angle
- register
- control circuit
- digital
- digital control
- 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 prevent the inflow of overcurrent due to the failure in commutation, by automatically changing a control angle for a prescribed time after the stoppage of a digital control circuit.
CONSTITUTION: A time-up detection circuit 33 generates a low output when no control angle signal is entered for a prescribed time. A flip-flop 34 performs shifting when it receives a shifting instruction. A control angle register 32 can be used as either a counter or a register. When the digital control circuit 7 is normal, the control angle register 32 is used as a register. When the digital control circuit is abnormal, the control angle register is used as counter. A control angle instruction is thus changed at a constant ratio after the stoppage of the digital control circuit. A thyristor gate pulse is thereafter suppressed. Even if a digital controller becomes abnormal due to some cause, the thyristor gate pulse is not immediately eliminated and the control angle is once shifted and then suppressed. Therefore, no commutation failure takes place even in inverter operation.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP9909378A JPS5526071A (en) | 1978-08-16 | 1978-08-16 | Digital pulse phase shifter |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP9909378A JPS5526071A (en) | 1978-08-16 | 1978-08-16 | Digital pulse phase shifter |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5526071A true JPS5526071A (en) | 1980-02-25 |
Family
ID=14238257
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP9909378A Pending JPS5526071A (en) | 1978-08-16 | 1978-08-16 | Digital pulse phase shifter |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5526071A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5833968A (en) * | 1981-08-21 | 1983-02-28 | Hitachi Ltd | Gate pulse generator |
-
1978
- 1978-08-16 JP JP9909378A patent/JPS5526071A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5833968A (en) * | 1981-08-21 | 1983-02-28 | Hitachi Ltd | Gate pulse generator |
JPH0250695B2 (en) * | 1981-08-21 | 1990-11-05 | Hitachi Ltd |
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