Brushless electric motor with self starting asymmetry
US4940912A · kind A · utility
13Cited by
9References
13Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Jun 2, 1989 |
| Grant date | Jul 10, 1990 |
| Priority date | — |
| Expiry date | Jun 2, 2009 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K29/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The motor includes a rotor (2) with permanent magnets and a stator (3) that surrounds the rotor and includes reluctance pads (9, 10) provided to place the rotor (2), upon stopping, in a position where the startup of the motor will be assured. The reluctance pads (9, 10) are asymmetrical with respect to the magnetic axis (A) of the coils of the stator (3) and include notches (4), at least some of which serve to accommodate at least one coil of the stator (3), in order to assure obtaining a maximum winding coefficient.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.