Three-phase permanent-magnet electric rotating machine
US5854526A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 11, 1996 |
| Grant date | Dec 29, 1998 |
| Priority date | — |
| Expiry date | Jul 11, 2016 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K2201/12
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A three-phase permanent-magnet electric rotating machine having necessary performance which can be realized easily at a low cost, wherein a stator includes a stator iron core having a disc portion and 3n magnetic poles formed so as to be erected at right angles from an outer circumference of the disc portion, and excitation windings mounted on the magnetic poles so as to have a predetermined width in the axial direction, and wherein a rotor is constituted by permanent magnets magnetized into N and S poles arranged alternately in the direction of rotation of the rotor and the rotor is supported so as to face the top ends of the respective magnetic poles of the stator through a predetermined air gap. In this case, the number n is an integer not smaller than 1. Alternatively, n may be selected to be an even number not smaller than 2 so that the excitation windings may be mounted on every other one of the magnetic poles. Preferably, a plurality of magnetic teeth of a predetermined shape may be formed on each of the top end portions of the magnetic poles formed in the stator iron core. Further preferably, excitation windings are mounted on first and second stator iron cores which are do…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.