Permanent magnet type brushless motor
US5532531A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 24, 1994 |
| Grant date | Jul 2, 1996 |
| Priority date | — |
| Expiry date | Oct 24, 2014 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K37/125
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A permanent magnet type brushless motor wherein the number of a stator magnetic poles is 3 m (where m is an integer not less than 2), Z pieces of N pole and Z pieces of S pole (where Z is m (3n.+-.1), and n is an integer not less than 2) are magnetized alternately with the same pitch, and an angle formed between a center of N pole of the permanent magnet corresponding to a pole tooth at the center of any one of the stator magnetic poles and a center of S pole of the permanent magnet corresponding to a pole tooth at the center of one of the stator magnetic poles adjacent to the any one of the stator magnetic poles is 360.degree. (n.+-.1/2)/Z.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.