ROTATION ANGLE DETECTOR

摘要

A rotation angle detector (100) in which a magnetic sensor (120) is placed so as to measure the magnetic flux density in the direction of the rotation axis of a magnet (110). The magnet (110) is chamfered at its portion near the magnetic sensor (120) and this moderates the radial gradient of the magnetic flux at the position of the magnetic sensor (120). As a result, even if the magnet (110) radially moves due to radial play, a variation in the magnetic flux density at the position of the magnetic sensor (120) is less.