Maximum stiffness permanent magnet rotor and construction method
US4617726A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 6, 1984 |
| Grant date | Oct 21, 1986 |
| Priority date | — |
| Expiry date | Dec 6, 2004 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49012
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A permanent magnet rotor construction technique resulting in a rotor having excellent stiffness characteristics and being capable of higher speeds and longer lengths is disclosed. The rotor is constructed using nonfusion bonding techniques whereby an inner cylinder of magnetizable material is bonded inside a hollow outer cylinder of non-magnetizable material, with the resulting assembly having cylindrical end pieces also of non-magnetizable material bonded at each end. Pockets for receiving the rare earth permanent magents are then machined through the outer cylinder, and the magnets are mounted in the pockets in contact with the magnetizable material of the inner cylinder. Construction of the rotor is completed by installing a thin cylindrical shell over the permanent magnets in the areas of the rotor adjacent thereto.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.