Angular sensor
First Claim
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.
1 Assignment
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Accused Products
Abstract
An angular sensor which enables to obtain an output signal proportional to a relative rotational angle with low manufacturing cost and with miniaturized size. An angular sensor which includes a first magnet and a second magnet fixed to a rotation body, magnetic flux sensing surface is fixed to the stator to be positioned in magnetic field between the first magnet and the second magnet and perpendicular to magnetic sensing direction for sensing a magnetic flux, a magneto-electric transducer element for outputting an electric signal corresponding to a magnetic sensing direction element of the magnetic density, deflection yokes. The deflection yokes are positioned facing the magnetic flux sensing surfaces. The deflection yokes are positioned within a range of three quarters of a distance between the first magnet and the second magnet in X-axis direction and one half of a distance between the first magnet and the second magnet in Y-axis direction.
28 Citations
14 Claims
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1. An angular sensor comprising:
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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;
whereinthe 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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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Specification