Permanent magnet motor and washing machine provided therewith
US8354766B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 24, 2009 |
| Grant date | Jan 15, 2013 |
| Priority date | — |
| Expiry date | Aug 26, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K29/03
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A permanent magnet motor includes a rotor and a stator, a plurality of permanent magnets forming a plurality of magnetic poles in a core of the rotor and magnetic pole teeth located so as to correspond to phase windings of the stator. The permanent magnets include a plurality of types of permanent magnets having different coercive forces and arranged substantially into an annular shape so that one type of the permanent magnet constitutes each magnetic pole. The permanent magnets each having a relatively smaller coercive force are arranged at a first interval in the rotor, and the magnetic pole teeth corresponding to the same phase windings are arranged at a second interval differing from the first interval in the stator.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.