Apparatus and method for controlling a thyristor converter in response to change in mode of load current
US4571668A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 5, 1984 |
| Grant date | Feb 18, 1986 |
| Priority date | — |
| Expiry date | Apr 5, 2004 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S388/917
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A control apparatus for a thyristor converter which supplies electric power to a load generating a changeable electromotive force, wherein, in response to a load current being changed from an intermittent load current mode to a continuous load current mode, an actual main circuit constant of the load is calculated on the basis of a pregiven main circuit constant of said load, a predetermined minimum value of a DC average motor current at which a compensation control angle is zero, a DC average load current and a set control angle at a time when the load current just changed from the intermittent load current mode to the continuous load current mode. The compensation control angle is obtained on the basis of the calculated actual main circuit constant and the DC average load current. The calculated compensation control angle is added to the set control angle to thereby apply the added angle to the thyristor converter as a firing control angle.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.