Japan Servo Co.,ltd.

Takanobu Igarashi

Hiroshi Hagino

Atushi Yamamoto

Masahiro Horiguchi

A magnetic linear position sensor comprises a first yoke which is made of soft magnetic material; a first magnet which is placed at the first yoke, and whose surface is the N-pole and is inclined; a second magnet which is placed at the first yoke, and whose surface is the S-pole and is inclined in a direction opposite to the surface of the first magnet and in a direction facing the surface of the first magnet; a second yoke which is placed at a position opposing the first magnet and the second magnet through an air gap and is made of soft magnetic material; and a magnetoelectric transducer which is placed in the air gap.

Magnetic linear position sensor

The invention relates to a magnetic rotary position sensor that detects the absolute position of a rotation angle as an electric output in a non-contact state with magneto-electric transducers for converting a magnetic flux variation into a voltage. The magnetic rotary position sensor of the invention includes a cylindrical yoke, semi-cylindrical first and second magnets, and magneto-electric transducers. Here, the first and second magnets are disposed on the inside of the yoke to face to each other, and are magnetized in a manner that the N-pole and S-pole face to each other. The magneto-electric transducers are placed in the magnetic field generated by the first and second magnets, rotate against the first and second magnets, and are disposed at a position to detect the magnetic field in the tangential direction of a circle in which the center of the circle coincides with the center of the yoke and the radius of the circle is equal to or larger than half the outline width of the magneto-electric transducers.

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Kiryu, Japan

Takanobu Igarashi