Sensorless start of synchronous machine
US5363032A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 12, 1993 |
| Grant date | Nov 8, 1994 |
| Priority date | — |
| Expiry date | May 12, 2013 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P2101/30
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A synchronous generator usable in both a starting mode of operation and a generating mode of operation includes a permanent magnet generator having a permanent magnet and an armature winding rotatable with respect to the permanent magnet, an exciter portion having an exciter armature winding and an exciter field winding rotatable with respect to the exciter armature winding, and a main generator portion having a main generator armature winding and a main generator field winding rotatable with respect to the main generator armature winding. An inverter is coupled to supply power to the main generator portion armature winding via a DC link during the starting mode of operation, and an inverter controller includes a position sensing circuit that generates a rotor position signal based upon the differential reluctance between pairs of phase windings in the main generator portion armature winding.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.