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Magnetic bearing devices

  • US 5,973,468 A
  • Filed: 07/18/1997
  • Issued: 10/26/1999
  • Est. Priority Date: 07/18/1996
  • Status: Expired due to Fees
First Claim
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1. A magnetic bearing device comprising:

  • a radial position sensor for measuring the position of a rotor in its radial direction;

    displacement arithmetical means for processing a displacement measured by the radial position sensor;

    first compensating means for improving stiffness in a frequency band including at least a first conical mode resonant frequency and a second conical mode resonant frequency upon receiving an output of the displacement arithmetical means;

    second compensating means for correcting an output of the first compensating means;

    power amplification means for power-amplifying an output of the second compensating means; and

    a radial electromagnet for controlling the position of the rotor in its radial direction based on an output of the power amplification means.

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