| 摘要 |
PROBLEM TO BE SOLVED: To provide a rotation angle detector of high angle detection precision capable of preventing the angle detection precision from getting worse even when slight arrangement shifts are generated in the first and second magnetic sensors, and capable of precluding hysteresis from being generated in output characteristics of first and second magnetic sensors. SOLUTION: A magnetic collection plate 3 is arranged in parallel to a magnet 2, the first and second magnetic sensors 4, 5 are arranged between an outer circumferential circle of the magnet 2 and an outer circumferential circle of the magnetic collection plate 3, and changes of magnetic flux components imparted to magnetosensitive faces of the first and second magnetic sensors 4, 5 are restrained thereby even when slight assembling errors are generated in the first and second magnetic sensors 4, 5, to prevent the angle detection precision from getting worse. The hysteresis is also precluded from being generated in the output characteristics of the first and second magnetic sensors, in an outward path and a returning path in rotation of the magnet 2, because the magnet 2 and the magnetic collection plate 3 are rotated integrally. A shift of the detection angle is thereby restrained to a very small extent. COPYRIGHT: (C)2006,JPO&NCIPI
|
