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Magnetic bearing apparatus

  • US 6,770,992 B2
  • Filed: 10/15/2001
  • Issued: 08/03/2004
  • Est. Priority Date: 10/16/2000
  • Status: Expired due to Fees
First Claim
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1. A magnetic bearing apparatus comprising:

  • a rotor;

    a motor having stator coils for generating a rotary magnetic field for rotating the rotor;

    magnetic supporting coils for producing a magnetic force for magnetically supporting the rotor in a radial direction thereof;

    a radial position sensor for detecting movement of the rotor in the radial direction thereof in the vicinity of the radial posistion sensor;

    composite magnetic force inferring means for inferring composite vectors of the magnetic force affecting the rotor based on the rotary magnetic field and the radial position of the rotor; and

    magnetic support adjustment means for adjusting the magnetic force produced by the magnetic supporting coils to cancel the composite vectors of the magnetic force in the motor.

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