Rotor hub assembly with non-magnetic resolver shielding ring
US9154019B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 12, 2012 |
| Grant date | Oct 6, 2015 |
| Priority date | — |
| Expiry date | Jan 14, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K11/0141
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A hub assembly for an electric machine includes a rotor hub and a machine rotor. Rotation of the machine rotor generates an electromagnetic (EM) field. The hub assembly includes a resolver rotor that encodes an angular position of the machine rotor as a set of resolver signals. An EM field barrier ring between the resolver rotor and the rotor hub adds a magnetic barrier between the machine rotor and the resolver rotor to reduce noise in the resolver signals. The resolver rotor may be bonded to the EM field barrier ring. The EM field barrier ring may have an L-shaped cross section, and may be press-fitted into a pocket of the rotor hub. A vehicle includes a transmission having an input member and an electric machine having a rotor shaft connected to the input member of the transmission. The electric machine includes the hub assembly noted above.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.