Circuit arrangement for firing controlled, parallel-connected electric valves
US4063145A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 6, 1976 |
| Grant date | Dec 13, 1977 |
| Priority date | — |
| Expiry date | May 6, 1996 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M1/088
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Apparatus for firing the thyristors or valves in parallel connected first and second valve branches. More particularly, a firing device is provided for providing firing pulses to at least a first valve in the first valve branch. A refiring device is provided which includes a transformer for determining the difference in the current carried by the first valve and a second valve adjacent thereto in the second valve branch. The latter refiring device also comprises a threshold member which, when the current difference determined by the transformer exceeds a predetermined value, causes the one of the first and second valves carrying the lesser current to receive firing pulses.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.