Magnetostrictive torque sensor and electric power steering apparatus including the same
First Claim
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1. A magnetostrictive torque sensor comprising:
- a shaft made of a magnetized material;
a magnetostrictive portion provided on the shaft at a position distanced for a predetermined length from an end of the shaft;
a detection coil that faces the magnetostrictive portion, and detects a change in a magnetic characteristic of the magnetostrictive portion; and
a plating made of a nonmagnetic material, that is located above the magnetostrictive portion and between the magnetostrictive portion and the end of the shaft in an axial direction of the shaft.
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Abstract
This magnetostrictive torque sensor includes: a shaft made of a magnetized material; a magnetostrictive portion provided on the shaft at a position distanced for a predetermined length from an end of the shaft; a detection coil that is arranged so as to face the magnetostrictive portion, and detects a change in a magnetic characteristic of the magnetostrictive portion; and a plating made of an nonmagnetic material, that is provided on the end of the shaft.
16 Citations
8 Claims
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1. A magnetostrictive torque sensor comprising:
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a shaft made of a magnetized material; a magnetostrictive portion provided on the shaft at a position distanced for a predetermined length from an end of the shaft; a detection coil that faces the magnetostrictive portion, and detects a change in a magnetic characteristic of the magnetostrictive portion; and a plating made of a nonmagnetic material, that is located above the magnetostrictive portion and between the magnetostrictive portion and the end of the shaft in an axial direction of the shaft. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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Specification