Switched reluctance motor
US5945761A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 30, 1997 |
| Grant date | Aug 31, 1999 |
| Priority date | — |
| Expiry date | Sep 30, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K19/103
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The clearance between the stator pole portions and the rotor pole portions at the axial central portion is larger than the clearance therebetween at the axial end portions. According to these characteristics, the magnetic attracting force causing objectionable acoustic noise is increased at the axial end portions of the housing and the stator in which stiffness against the magnetic attracting force is high and decreased at the axial central portion in which their stiffness against the magnetic attracting force is low. Thereby, the objectionable acoustic noise is reduced without changing the motoring torque and increasing the weight of the switched reluctance motor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.