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Magnetic angle sensor

  • US 8,384,376 B2
  • Filed: 07/20/2009
  • Issued: 02/26/2013
  • Est. Priority Date: 07/18/2008
  • Status: Active Grant
First Claim
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1. A multi-turn angle sensor, said sensor comprising:

  • a. at least one encoder magnet (1) having a mechanical drive, rotatably supported about a rotation axis (2);

    b. a magneto sensitive sensor unit (4) with a sensor element (5), which is permeated by the magnetic field of the encoder magnet (1);

    c. on the one hand, detecting and putting out the rotation angle of the pole direction of the encoder magnet (1) about the rotation axis (2);

    d. on the other hand, detecting and putting out the absolute value of the magnetic field applied to the sensor element (5) of the sensor unit (4);

    whereine. the axial distance between the at least one encoder magnet (1) and the sensor element (5) is constant; and

    f. an additional field variator (6) which changes the magnetic field provided at the sensor element (5) as a function of the total rotation angle of the encoder magnet (1) and wherein the additional field variator (6) is moved by means of a threaded spindle, on which a spindle nut runs.

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