Permanent magnet brushless machine with magnetic flux regulation
US8148867B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 10, 2009 |
| Grant date | Apr 3, 2012 |
| Priority date | — |
| Expiry date | Aug 28, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K21/046
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A permanent magnet machine (PMM) has a generally cylindrical permanent magnet (PM) rotor that has multiple PM rotor poles arranged around a rotor axis of rotation; and a stator with two generally cylindrical and concentric yokes, an inner yoke proximate the PM rotor with associated multiple inner poles and inner armature windings suitable for multiphase alternating current operation that form a PMM magnetic flux circuit, an outer yoke with associated multiple outer poles and outer control windings suitable for connection to a direct current source, with distal ends of the outer poles in contact with the inner yoke to form an external magnetic flux circuit that diverts magnetic flux from the PMM magnetic flux circuit; wherein application of increasing direct current to the outer windings results in increased magnetic reluctance of the external magnetic flux circuit, thereby causing the external magnetic flux circuit to divert less magnetic flux from the PMM magnetic flux circuit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.