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SELF-COMPENSATING TACHOMETER GENERATOR

  • US 3,564,313 A
  • Filed: 08/08/1969
  • Issued: 02/16/1971
  • Est. Priority Date: 08/08/1969
  • Status: Expired due to Term
First Claim
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1. A tachometer generator comprising:

  • A. a rotor;

    1. made of material having a high magnetic permeability;

    2. mounted for rotation about an axis; and

    3. a plurality of pole pieces arranged about said axis; and

    B. a stator including;

    1. a permanent magnet;

    2. a stator pole piece positioned opposite the rotor radially outward from the axis thereof, either the rotor pole pieces or the stator pole piece having radial passages for receiving the opposite member so that the rotor and stator pole pieces interfit as they move relative to one another, thereby providing relatively short rotor-stator flux paths generally parallel to the axis so that relatively large changes in the rotor-stator flux from said magnet occur in response to rotation of the rotor; and

    3. a winding associated with the stator pole piece and arranged to develop a voltage in response to said flux changes.

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