Cross-tied current regulator for load commutated inverter drives
US4420719A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 23, 1981 |
| Grant date | Dec 13, 1983 |
| Priority date | — |
| Expiry date | Dec 23, 2001 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P27/047
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A control system for an AC motor drive including a source side converter and a load side converter coupled together by means of a DC link circuit wherein the current in the DC link circuit is controlled by either the source side converter or load side converter depending upon which converter is capable of control. This is achieved by crosstieing a signal from the normal regulating path in the source side converter control to the alternate regulating path in the load side converter control. This signal is chosen to be indicative of the source side converter controller being unable to control current, and may be derived from current error. This signal operates to alter the firing angle of the load side thyristor bridge to regulate the DC link current in the event the source side converter is unable to maintain the required current regulation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.