Patent ID: 9154019
Filing Date: 2015-10-06
Classification: H02K

Abstract:
1. A hub assembly comprising: a rotor hub having an inner circumferential wall; a machine rotor positioned within the rotor hub, wherein an electromagnetic field is generated with respect to the machine rotor when the machine rotor is energized and rotated about an axis of rotation of a rotor shaft; a resolver rotor positioned within the electromagnetic field of the machine rotor and spaced apart from the rotor shaft, wherein the resolver rotor is configured to encode an angular position of the machine rotor as a set of resolver signals; and a non-magnetic electromagnetic (EM) field barrier ring having orthogonally-arranged side walls, positioned between the resolver rotor and the rotor hub, and fully circumscribing the resolver rotor, wherein the EM field barrier ring is press-fitted or bonded to the inner circumferential wall of the rotor hub, and the resolver rotor is bonded to and co-extensive with each of the orthogonally-arranged side walls; wherein the EM field barrier ring forms a magnetic barrier between the electromagnetic field of the machine rotor and the resolver rotor to thereby reduce noise in the set of resolver signals.