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Systems and methods for cooling and lubrication of electric machines

  • US 8,427,019 B2
  • Filed: 08/25/2010
  • Issued: 04/23/2013
  • Est. Priority Date: 08/25/2010
  • Status: Expired due to Fees
First Claim
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1. An electric machine comprising:

  • a rotor fixed to a rotatable shaft and supported by means of one or more bearings;

    a stator stationary in relation to the rotatable rotor and shaft with a gap between the rotor and the stator;

    a housing surrounding all or part of the machine; and

    a plurality of liquid flow passages within the machine, wherein the liquid flow passages include;

    one or more stator liquid flow pathways between the stator and the housing;

    one or more rotor liquid flow pathways along the rotatable shaft toward the rotor and stator; and

    one or more bearing liquid flow pathways contacting at least one bearing.

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