Muncy, Geissler, Olds & Lowe, P.C.
Electric motor
An electric motor includes a stator having multiple magnetic poles and a rotor rotatably mounted to the stator. The rotor includes a shaft, a commutator and a rotor core fixed to the shaft; and windings wound on the rotor core and electrically connected to the commutator. The rotor core is formed by stacking a plurality of laminations. Each lamination includes an inner ring having a hole for fixing the shaft; an outer ring radially spaced from the inner ring; multiple teeth extending outwardly from the outer ring, and multiple ribs connecting the inner ring to the outer ring. Each rib has a width w measured in a circumferential direction of the lamination. The number of ribs is n. The width w and the number n satisfy the formula: 0.75≤n×w2≤64, where the width w is measured in millimeters.
JOHNSON ELECTRIC INTERNATIONAL AG
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inventional additional inventional
Guo Dong Ji Yu Xiao Wu Rui Feng Yao Yong Bin Di Xian Ming Sheng
Ren Liang Xie Qin Zhao Li Wang Wu Han