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ELECTRIC MACHINE

  • US 20100019590A1
  • Filed: 07/01/2009
  • Published: 01/28/2010
  • Est. Priority Date: 07/28/2008
  • Status: Active Grant
First Claim
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1. A subsea electric machine system, comprising:

  • a main housing adapted to contain a fluid at a pressure above an ambient pressure about the main housing;

    an electric machine in the main housing, the electric machine comprisinga stator; and

    a rotor supported in the stator that, by interaction of magnetic fields between the stator and the rotor, at least one of moves relative to the stator or operates in generating electricity when moved relative to the stator, the rotor havingan elongate rotor core;

    a plurality of permanent magnets arranged around the rotor core; and

    a sleeve around the permanent magnets that provides primary radial support for retaining the permanent magnets to the rotor core during operation of the electric machine, the sleeve sealed to the rotor core to isolate the magnets from the fluid in the main housing; and

    a companion device coupled to the rotor of the electric machine.

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