Brian J Gallert

US Patent:

20130328454, Dec 12, 2013

Filed:

Jun 12, 2012

Appl. No.:

13/494163

Inventors:

Brian Gallert - Royal Oak MI,
Khwaja M. Rahman - Troy MI,
Matthew D. Laba - Oakland MI,
Paul F. Turnbull - Canton MI,
Brian Schulze - Ortonville MI,

Assignee:

GM GLOBAL TECHNOLOGY OPERATION LLC - Detroit MI

International Classification:

H02K 11/00

US Classification:

310 68 B

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.