Control of switched reluctance machines
US6351094B1 · kind B1 · utility
18Cited by
9References
20Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 14, 2000 |
| Grant date | Feb 26, 2002 |
| Priority date | — |
| Expiry date | Feb 14, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P25/089
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A switched reluctance drive includes a reluctance machine, a controller, power switches actuated by the controller and a current transducer for monitoring the current in each phase winding. The controller employs a sensorless rotor position detection technique by injecting voltage pulses into the idle period of each phase winding in a chopping mode. Acoustic noise associated with the injected pulses is concealed by varying the frequency at which the pulses are injected according to rotor speed. In an alternative embodiment the frequency is varied pseudo-randomly.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.