| 摘要 |
PROBLEM TO BE SOLVED: To provide a rotational angle detection device capable of suppressing variation on a detection angle between individual pieces.SOLUTION: A rotational angle detection device 10 includes a permanent magnet 11 fixed to a rotary shaft 91, a yoke 15 formed into a cylindrical shape to include the permanent magnet 11 and a rotation axial center &phgr; and fixed to a housing 90, and a hall element 26 for outputting an electric signal according to the intensity of the magnetic field of a gap 20 changed by rotation of the rotary shaft 91. Thus, the rotational angle detection device 10 can be configured by one permanent magnet 11 and one yoke 15, the number of components is small, and thus variation on positional relationship between components to be assembled is hardly generated. Thus, variation on a detection angle between individual pieces is suppressed. |
