Ac motor drive with improved voltage-source inverter
US4959602A · kind A · utility
31Cited by
6References
3Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 2, 1989 |
| Grant date | Sep 25, 1990 |
| Priority date | — |
| Expiry date | Jun 2, 2009 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P23/06
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A bridge between the inductor and the capacitor of the DC-Link of a voltage-source inverter AC motor drive includes a GTO (or transistor) device used for forced-commutation in the regenerating mode, while the current is controlled ON and OFF according to a duty-cycle defined by an hysteresis circuit to hold the current flowing into the inductor to a magnitude which establishes a boost on the capacitor voltage, so that in the motoring, as well as the regenerating mode of operation, the voltage of the capacitor is kept constant and higher than upon the converter output.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.