JPS54142556A - Reversible converter - Google Patents
Reversible converterInfo
- Publication number
- JPS54142556A JPS54142556A JP4933178A JP4933178A JPS54142556A JP S54142556 A JPS54142556 A JP S54142556A JP 4933178 A JP4933178 A JP 4933178A JP 4933178 A JP4933178 A JP 4933178A JP S54142556 A JPS54142556 A JP S54142556A
- Authority
- JP
- Japan
- Prior art keywords
- output
- detector
- thyristor
- level
- voltage
- 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
- Control Of Electrical Variables (AREA)
- Ac-Ac Conversion (AREA)
Abstract
PURPOSE: To operate a positive-negative change exactly by providing a voltage detector and an output current detector to each arm of the thyristor and by making the detectors operate a positive-negative change.
CONSTITUTION: A signal of over certain level of the output of voltage detector VD is converted into a square wave by the level detector 15, its continuous time is compared with a set time given by the level reference 16. Its output and an output of the pulse shaping circuit 11 are fed to the OR sircuit 18, the output of which changes the positive gate 13 and negative gate circuits 14. Opposite voltage of the thyristor is monitored after the current wave form of load L becomes zero, when the opposite voltage is detected, the level detector 15 operates. When the opposite voltage is applied to the thyristor for more than the time T set by the level reference 16, the output of comparator 17 is inverted to "1", and the output of OR circuit 18 to "0". By this, the operation is changed to the negative side one.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4933178A JPS54142556A (en) | 1978-04-27 | 1978-04-27 | Reversible converter |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4933178A JPS54142556A (en) | 1978-04-27 | 1978-04-27 | Reversible converter |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS54142556A true JPS54142556A (en) | 1979-11-06 |
Family
ID=12827995
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP4933178A Pending JPS54142556A (en) | 1978-04-27 | 1978-04-27 | Reversible converter |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS54142556A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5115387A (en) * | 1990-08-14 | 1992-05-19 | Polyspede Electronics Corporation | Circuitry and method of protecting thyristors |
-
1978
- 1978-04-27 JP JP4933178A patent/JPS54142556A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5115387A (en) * | 1990-08-14 | 1992-05-19 | Polyspede Electronics Corporation | Circuitry and method of protecting thyristors |
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