Electric machine and vehicle having asymmetric rotor laminations

Number of patents in Portfolio can not be more than 2000

United States of America

PATENT NO 12237723
APP PUB NO 20220069647A1
SERIAL NO

17412585

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ATTORNEY / AGENT: (SPONSORED)

Importance

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Abstract

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An electric machine includes a stator rotatably supporting a rotor, the rotor includes a stacked rotor laminations forming a rotor core with cavities having magnets arranged in the cavities through at least two adjacent rotor laminations and parallel to a rotor central axis, each lamination including an outer edge having grooves or scallops arranged asymmetrically about the circumference to reduce torque ripple. At least one groove or scallop may be arranged along a q-axis and at least one groove or scallop may be arranged between a q-axis and a d-axis of the rotor core. The laminations may be substantially identical with a first group of laminations flipped or rotated about a diametric axis relative to a second group of laminations. An electrified vehicle includes an electric machine powered by a traction battery, the electric machine having a rotor core with stacked rotor laminations having a scalloped outer edge.

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Patent Owner(s)

  • FORD GLOBAL TECHNOLOGIES, LLC

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Deng, Chuan Nanjing, CN 14 13
Du, Guohua Nanjing, CN 13 10
Yuan, Yigang Nanjing, CN 13 10

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