Motor
US8643239B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 18, 2011 |
| Grant date | Feb 4, 2014 |
| Priority date | — |
| Expiry date | Jul 31, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K2213/03
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A motor including a rotor and a stator. The rotor includes a rotor core, magnet pole portions, and core pole portions. First magnetic pole portions, which are the magnet pole portions or the core pole portions, each include a first and second opposing parts arranged in an axial direction. Each first opposing part includes an auxiliary groove, and each second opposing part does not include an auxiliary groove. Where M(°) represents an open angle of the first magnetic pole portion, G(°) represents an open angle of the void, and L represents the number of teeth, an angle D1 from a center line in the circumferential direction of the first magnetic pole portion to the side surface in the auxiliary groove that is closer to the center line in the circumferential direction satisfies D1=M/2+G−a×360(°)/L (where a is a natural number).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.