Motor and electrically-driven fan employing the same
US7109623B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 3, 2005 |
| Grant date | Sep 19, 2006 |
| Priority date | — |
| Expiry date | Feb 3, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K29/08
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An electrically-driven fan 1 comprises a base portion 2; a bearing portion 11; a stator 13 including iron core portions 15 and coils 16; a rotor 4 including a rotary shaft 20 and a cylindrical magnet 22; blowing blades 5; and a rotor position detector 23 which is disposed on a side of the cylindrical magnet 22 near to the base portion 2, with a gap of predetermined width relative to the cylindrical magnet 22; wherein the cylindrical magnet 22 includes a thin-walled portion 24 in which an effective thickness of one end part thereof near to the rotor position detector 23 is made smaller than an effective thickness of the other end part thereof.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.