Method and apparatus for firing angle control of series connected thyristor switches
US4639851A · kind A · utility
3Cited by
3References
6Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 25, 1985 |
| Grant date | Jan 27, 1987 |
| Priority date | — |
| Expiry date | Apr 25, 2005 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M5/271
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
To eliminate thyristor failure due to voltage imbalance across series-connected thyristors during reverse voltage recovery caused by current discontinuity under continuous pulse application to the thyristors, the continuous pulse is discontinued after a time interval of application which is a function of the control signal establishing the firing delay angle. The continuous pulse is reinstated as in a double-pulse mode, thereafter, with the same controlled duration.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.