Single phase permanent magnet motor
US10630155B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 22, 2016 |
| Grant date | Apr 21, 2020 |
| Priority date | — |
| Expiry date | Jun 6, 2037 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K1/2706
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A single phase permanent magnet motor includes a stator and a rotor. The stator includes a stator core and a stator winding. The stator core includes an outer yoke, teeth extending inwardly from the outer yoke, and pole shoes extending from inner ends of the teeth. The rotor is received in a space cooperatively defined by the pole shoes. The rotor includes circumferentially arranged permanent magnetic poles. An outer circumferential surface of the permanent magnetic poles is concentric with an inner circumferential surface of the pole shoes, such that a uniform air gap is formed between the pole shoes and magnetic poles. The single phase permanent magnet motor forms the uniform air gap, which reduces the vibration and noise. The pole shoes form invisible positioning slots, which avoids the negative effect of the positioning slots to the thickness of the air gap and reduces the startup dead point.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.