Rotor for an electrical machine
US10651712B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 20, 2015 |
| Grant date | May 12, 2020 |
| Priority date | — |
| Expiry date | May 10, 2037 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K17/20
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A rotor (10) for an axial-flux electrical machine (12) is provided. The rotor (10) comprises an annular disc-shaped central frame (20) formed of a ferromagnetic material and having first and second opposing surfaces (26, 28). Each of the first and second opposing surface (26, 28) has shaped protrusions (40) extending therefrom. The rotor (10) further comprises a first and a second outer frame (22, 24) formed of a non-ferromagnetic, electrically conducting material. Each outer frame (22, 24) has an inner periphery portion (32) and an outer periphery portion (34) and a plurality of bars (36) galvanically connecting the inner and outer periphery portions (32, 34). Gap portions (38) are defined between adjacent bars (36) and the inner and outer periphery portions (32, 34). The gap portions (38) are shaped complementary to the shaped protrusions (40) of the central frame (20).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.