Synchronous inductor electric motor
US5481147A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 3, 1994 |
| Grant date | Jan 2, 1996 |
| Priority date | — |
| Expiry date | Jan 3, 2014 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K37/02
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A synchronous inductor electric motor includes a hollow stator having a plurality of permanent magnets secured to the inner surface thereof. The magnets are radially polarized in alternating fashion about the inner circumference of the stator. A plurality of radially inwardly extending stator teeth are provided on each of the magnets so as to exhibit a polar magnetization which is the same as the adjacent magnets. A rotor assembly supported concentrically within the stator includes a shaft having a plurality of rotor pole sub-assemblies provided thereon. Each of the rotor pole sub-assemblies includes a hub secured to the shaft, a pair of annular rotor packs secured to the ends of the hub, and an electromagnetic coil disposed loosely about the hub between the two rotor packs. Each of the rotor packs has a plurality of axially extending outer teeth formed thereabout which are disposed adjacent to the inner stator teeth. The rotor pack teeth of each of the rotor pole sub-assemblies are angularly offset from one another. The coils are engaged by the stator such that the rotor assembly is free to rotate relative thereto. The coils are sequentially energized and de-energized so as to sel…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.