Nano-crystalline coating for magnet retention in a rotor assembly
US10763715B2 · kind B2 · utility
1Cited by
12References
13Claims
0Family size
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Key dates
| Filing date | Dec 27, 2017 |
| Grant date | Sep 1, 2020 |
| Priority date | — |
| Expiry date | Jun 13, 2038 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K2213/03
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A rotor assembly with a rotor hub, a plurality of permanent magnets positioned circumferentially around at least a portion of the rotor hub, and a coating on at least a portion of the plurality of permanent magnets. The coating forming a retaining band that circumferentially extends around the rotor hub and the plurality of permanent magnets. The coating includes a nano-crystalline layer including a metal or metal alloy and defines an average grain size of less than about 50 nanometers (nm).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.