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Device and method for cooling a motor

  • US 5,844,333 A
  • Filed: 11/12/1996
  • Issued: 12/01/1998
  • Est. Priority Date: 11/12/1996
  • Status: Expired due to Fees
First Claim
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1. An apparatus for cooling an enclosed-frame motor in which a frame prevents the motor air flowing within the frame from mixing with ambient air outside the frame, the motor including a pair of longitudinally spaced end regions and a central region intermediate the end regions, the apparatus comprising:

  • an enclosure presenting a pair of longitudinally spaced end sections, a central section intermediate the end sections, an inlet opening providing communication between the central region of the motor and the central section of the enclosure, and outlet openings providing communication between the end sections of the enclosure and the end regions of the motor;

    a cross-flow heat exchanger separating the central section of the enclosure from the end sections so that motor air passes into the central section of the enclosure, across the heat exchanger, and through the end sections to the end regions of the motor, the cross-flow heat exchanger including a plurality of air passages extending in a direction substantially transverse to the path of motor air through the enclosure, the air passages each presenting an inlet opening and an outlet opening;

    an intake plenum in fluid communication with the inlet openings of the air passages of the heat exchanger, the intake plenum including an inlet opening; and

    a fan for supplying ambient air under pressure to the inlet opening of the intake plenum.

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