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Passive tuned magnetic flux rate feedback sensing and control arrangement

  • US 5,420,741 A
  • Filed: 11/15/1993
  • Issued: 05/30/1995
  • Est. Priority Date: 11/15/1993
  • Status: Expired due to Term
First Claim
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1. A passive tuned magnetic flux rate feedback sensing and control arrangement, comprising:

  • a magnetic circuit including a rotor and a stator separated by a gap, the stator carrying a drive coil and a sensor coil;

    the stator and the rotor cooperatively arranged so that a signal is induced in the sensor coil and the sensor coil provides a signal proportional to the rate of change of flux in the magnetic circuit;

    means for providing a command signal;

    means for providing a signal for energizing the drive coil;

    means for combining the signal for energizing the drive coil and the command signal for providing a combined signal;

    means connected to the means for providing the combined signal for applying current compensation to the combined signal and for providing a compensated signal;

    the means for providing a signal for energizing the drive coil connected to the means for applying current compensation to the combined signal and responsive to the compensated signal therefrom for providing the signal for energizing the drive coil; and

    passive tuned means connected across the sensor coil for implementing control of flux rate.

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