System for controlling operation of a switched reluctance motor between multi-phase operating mode and a reduced phase operating mode
US5861727A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 17, 1996 |
| Grant date | Jan 19, 1999 |
| Priority date | — |
| Expiry date | Apr 17, 2016 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P25/08
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An apparatus for controlling a switched reluctance machine changes the operating modes between a single-phase operating mode, and a multi-phase operating mode. The switched reluctance motor includes a rotatable rotor, a stator, and a plurality of stator windings defining a corresponding plurality of machine phases. When in the multi-phase mode, all of the plurality of stator windings corresponding to the plurality of machine phases are energized. When in the single-phase mode, stator windings corresponding to a single, selected machine phase are energized. The apparatus includes a logic circuit for sensing a speed of the rotor and generating a speed signal in response thereto, and a comparator circuit. The comparator circuit is responsive to the generated speed signal and is operative for changing the operating mode of the motor from the multi-phase mode to the single-phase mode when the rotor speed reaches a first predetermined level, and for changing the operating mode of the machine from the single-phase mode to the multi-phase mode when the rotor speed reaches a second predetermined level that is less than the first predetermined level. The first and second levels are offset an…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.