Flux controlled permanent magnet dynamo-electric machine
US5530307A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 28, 1994 |
| Grant date | Jun 25, 1996 |
| Priority date | — |
| Expiry date | Mar 28, 2014 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S174/19
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A brushless, permanent magnet dynamo-electric machine (50) has a stator assembly (52) and a rotor assembly (RA). The rotor assembly includes a rotor (R) mounted on a rotor shaft (RS). The stator assembly has a plurality of inwardly salient poles (54) and the rotor has a plurality of outwardly salient poles (RP). The rotor is comprised of a plurality of stacked rotor laminations (L) defining the rotor poles, and there is an air gap (G1) between the rotor and stator poles. An improvement (56) of the present invention controls the available flux coupled between the rotor and stator assemblies. A coil (70) is supported on a magnetic mounting structure (66) which is connected to an endwall (W) of the motor housing and fits the coil over the rotor shaft. D.C. current is supplied to the coil. A plurality of magnets (82a, 82b) extend the length of the lamination stack and the magnets are positioned adjacent an outer face of one pole for each set of rotor poles. The magnets are mounted on support structure (72) that extends about the coil. The magnets magnetically attach to the outer surface of the rotor poles to suspend the structure about the shaft. An air gap (G2) extends between the coi…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.