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Permanent magnet excited alternator compressor with brushless DC control

  • US 4,654,551 A
  • Filed: 05/20/1985
  • Issued: 03/31/1987
  • Est. Priority Date: 05/20/1985
  • Status: Expired due to Fees
First Claim
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1. In a unitary alternator-compressor assembly, a magnetic flux field generating assembly comprising:

  • a single stationary toroidal magnetic field coil means for generating magnetic flux and connected to a source of direct voltage;

    a permanent magnet comprising a continuous ring, said ring rotatably concentrically arranged around said field coil and in the plane thereof;

    rotor means concentrically arranged around said field coil and permanent magnet and in the plane thereof, said rotor means forming a part of the magnetic flux path for said coil and permanent magnet, said rotor means comprising first and second discs, each said disc including a plurality of circumferentially arranged pole pieces, said pole pieces of said respective first and second discs alternatingly interleaved, and said permanent magnet ring clamped between said first and second discs;

    cylindrical stator means concentrically arranged around said rotor and field coil, and in the plane thereof for completing said magnetic flux path, said stator means including a stator coil whereby rotation of said rotor generates a voltage in said stator coil; and

    wherein the flux in said stator varies as a function of the magnitude of the voltage applied to said field coil.

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