Magnetically enhanced variable reluctance motor systems
US4713570A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 4, 1986 |
| Grant date | Dec 15, 1987 |
| Priority date | — |
| Expiry date | Jun 4, 2006 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K37/20
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Electrically-energized salient stator poles of a variable reluctance motor terminate in stator teeth that oppose the rotor on a rotor surface. Permanent magnets located between adjacent stator teeth, and magnetized transverse to the stator to rotor gap, enhance the motor torque relative to the applied excitation in ampere-turns. Permanent magnets on the rotor are avoided by reversing the magnetization of the permanent magnets from pole to pole and energizing the pole windings to oppose the magnets in four phases 1 1 0 0, 0 1 1 0, 0 0 1 1, 1 0 0 1 during successive steps. In one embodiment, a linear motor utilizes the system by replacing the rotor with a linear actuator.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.