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Angular sensor

  • US 20030020468A1
  • Filed: 07/30/2002
  • Published: 01/30/2003
  • Est. Priority Date: 07/30/2001
  • Status: Active Grant
First Claim
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1. An angular sensor comprising:

  • a stator;

    a rotor relatively rotatable to the stator;

    a first magnet fixed to the rotor;

    a second magnet fixed to the rotor opposing to the first magnet;

    a magneto-electric transducer element fixed to the stator to be positioned in a magnetic field generated between the first magnet and the second magnet and having a magnetic flux sensing surface perpendicular to magnetic sensing direction for sensing a magnetic flux for outputting an electric signal corresponding to a magnetic sensing directional element of a magnetic flux density;

    a deflection yoke made of magnetic material and fixed to the stator to be positioned in the magnetic field generated between the first magnet and the second magnet; and

    a relative rotational angle between the stator and the rotor being detected in accordance with the electric signal outputted from the magneto-electric transducer element;

    wherein the deflection yoke is positioned facing the magnetic flux sensing surface and is positioned within a range of three quarters of a distance between the first magnet and the second magnet opposing each other in an X-axis direction and is positioned within a range of one half of the distance between the first magnet and the second magnet opposing each other in Y-axis direction, wherein a Z-axis corresponds to a shaft core of a relative rotation between the stator and the rotor, the X-axis corresponds to a shaft core of the magnetic sensing direction intersecting the Z-axis, and the Y-axis corresponds to a shaft core which is perpendicular to the Z-axis and X-axis.

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