Motor
US7626299B2 · kind B2 · utility
17Cited by
2References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 17, 2007 |
| Grant date | Dec 1, 2009 |
| Priority date | — |
| Expiry date | Apr 17, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K2213/03
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A motor includes a stator with an annular stator yoke, a stator core having a plurality of inner and outer teeth projecting from the stator yoke toward inside and outside respectively, a plurality of coils wound on the stator core, and an inner rotor and an outer rotor confronting the inner and outer teeth respectively via an air-gap, and having an permanent magnet respectively. The number of slots “S” and the number of poles “P” establish a relation of S:P=3:2N−1, where N is an integer equal to 1 or more, and a case when 2N−1 becomes a multiple of 3 is excluded.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.