Permanent magnet brushless electric motor system and method of using same
US6528967B2 · kind B2 · utility
13Cited by
9References
10Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 14, 2001 |
| Grant date | Mar 4, 2003 |
| Priority date | — |
| Expiry date | Jun 14, 2021 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P6/085
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A brushless motor-generator has a stator with armature windings for polyphase operation and a rotor having at least one pair of permanent magnet poles. A controller varies the magnitude of the alternating-current voltage applied to the armature windings for controlling the operating motor power factor to permit the rotor magnetic field to operate at the optimum or at least at an improved torque angle with respect to the stator magnetic field in the motoring mode, with little or no torque pulsations at substantially all or at least most conditions of motor load.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.