Patent ID: 7977845
Filing Date: 2011-07-12
Classification: H02K,Y10T

Abstract:
1. An induction motor, comprising: a stator including an inner passage having a longitudinal axis defining a bore; a steel rotor rotatably disposed within the bore of the stator, the steel rotor comprising: a Hot Isostatic Pressing (HIP) layer of copper integrally adhered to an outer surface of the steel rotor, the HIP layer of copper comprising: an air gap formed between an outer surface of the HIP layer of copper and an inner surface of the stator and extending along the longitudinal axis of the stator; a fan shroud; and a fan system, comprising: wherein the proximal HIP layer of copper and the distal HIP layer of copper are configured to provide a short circuit flux path across the rotor to engage with complementary poles of the stator; and