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Wye winding radial air-core gauge system

  • US 5,004,976 A
  • Filed: 11/03/1989
  • Issued: 04/02/1991
  • Est. Priority Date: 11/03/1989
  • Status: Expired due to Fees
First Claim
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1. A wye winding type air-core gauge system for generating a movable electromagnetic field in a direction and of a field strength proportional to a magnitude and a direction of input electrical signals representing changes in magnitude of a measurand emanating from a measurand source, said system comprising:

  • (a) wye-coil, radial air-core gauge means for providing a visual angular displacement indicative of changes in magnitude of the measurand;

    (b) sensor means having an input terminal connected to said measurand source for sensing the changes in magnitude of the measurand and to produce therefrom a series of electrical signals in a chosen format representing changes in magnitude of the measurand; and

    (c) control means adapted to receive said series of electrical signals and to produce therefrom combinations of maximum amounts of a voltage signal to a chosen coil of said gauge means and a series of pulse width modulated (PWM) signals at a chosen frequency and of durations to a selected second or third coil of said gauge in response to changes of magnitude of said series of magnitude signals for generating control signals to the chosen and selected coils of said gauge means which cause the occurrences of the visual angular displacements indicative of changes in magnitude of the measurand.

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