ASYMMETRICAL ROTOR WITH SYMMETRICAL PERFORMANCE

Abstract

A symmetrically performing motor includes an asymmetrical rotor. The rotor includes a core and a plurality of arcuately arranged magnets. The core includes a hub, a plurality of pole segments, and a plurality of bridges extending between and interconnecting respective ones of the pole segments to the hub. Each of the bridges has an axially varying width. The pole segments are swept in form such that the rotor core exhibits mirror asymmetry. Each of the pole segments includes a body, a head disposed radially adjacent the body, and a pair of arcuately spaced apart ears extending generally tangentially outwardly from the head. The head defines an arcuate outer head face extending along an outer rotor margin. Each of the ears defines a respective outer ear face disposed inward of the outer rotor margin. Each of the outer ear faces defines an ear angle relative to the outer rotor margin.

Inventors

BASTIEN, RYAN M.
CORCORAN, MARC J.

Assignees

Nidec Motor Corporation

Dates

Publication Date: 20260513
Application Date: 20250908