Redundant switched reluctance motor
US5239217A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 18, 1992 |
| Grant date | Aug 24, 1993 |
| Priority date | — |
| Expiry date | May 18, 2012 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K19/103
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A multiple phase switched reluctance motor (30). A stator assembly (32) has a plurality of inwardly salient teeth (34a-341) terminating at a central bore (36). A rotor assembly (38) is disposed for rotation in the bore and has a plurality of rotor teeth (42a-42d). The stator assembly has at least one redundant pole set for each motor phase. The rotor assembly has a corresponding proportional number of rotor teeth. The redundancy of the poles helps distribute ovalizing forces on the motor assembly. This lessens the effect of these forces and reduces motor noise produced by the assembly in response to the forces. In addition, the stator can have multiple teeth per pole and the rotor a multiple of the determined rotor teeth. The number of rotor teeth exceeds the number of stator teeth so the rotor teeth overlap the stator teeth. This improves starting torque in a desired direction of motor rotation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.