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Reverse flow stator ventilation system for superconducting synchronous machine

  • US 6,703,729 B2
  • Filed: 08/15/2001
  • Issued: 03/09/2004
  • Est. Priority Date: 08/15/2001
  • Status: Expired due to Term
First Claim
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1. A superconducting electromagnetic machine comprising:

  • a solid core rotor having a cryogenically cooled superconducting rotor coil winding;

    a stator coaxial with said rotor and having stator coils magnetically coupled with said superconducting rotor coil winding, said stator coils arranged around said rotor, and said stator having cooling passages extending from an outer periphery of the stator to an inner periphery of the stator, said inner periphery separated from the rotor by an annular air gap;

    said rotor having cooling passages for a cryogenic cooling fluid;

    an annular air gap between said solid core rotor and said stator, wherein said annular gap having at least one lateral opening comprising a cooling gas passage port and said annular gap being substantially open along a length of said rotor;

    a stator ventilation system providing a cooling gas to said outer periphery of the stator and said passages of the stator, wherein substantially all of said cooling gas flows through said annular gap and through said cooling gas passage port, wherein said ventilation system further comprises a plurality of baffle chambers adjacent said outer periphery of the stator, wherein said baffle chambers include a first chamber having an outer cooling gas inlet port open to a source of cooling gas and a second chamber having cooling gas inlet port open to said first chamber, and wherein said first and second chambers each have cooling gas outlets to said stator.

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