Rotor for a permanent magnet AC motor
US4388545A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 10, 1981 |
| Grant date | Jun 14, 1983 |
| Priority date | — |
| Expiry date | Jun 10, 2001 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K21/14
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A rotor for a self-starting permanent magnet AC motor is comprised of a permanent magnet disk mounted on a shaft of non-magnetic material. The magnet has a direction of magnetization parallel to the axis of the shaft resulting in two poles, one on each face of the magnet. Two disks of current carrying material are mounted on the shaft on either side of the magnet to act as starting coils. Pole pieces are mounted on the shaft and surround the starting disks. Claw-like projections spaced about and extending from the periphery of the pole pieces extend inwardly over the periphery of the magnet and starting disks. The claw-like projections from each pole piece are interlaced forming rotor poles of alternating polarity.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.