Patent ID: 8754638
Filing Date: 2014-06-17
Classification: G01D

Abstract:
1. A rotation sensor comprising: a rotor having a rotational center; first, second, and third magnetic field change detecting sections that are arranged spaced apart in a circumferential direction of the rotor; and a magnetic field generating section that generates a magnetic field provided to the first to third magnetic field change detecting sections, wherein the magnetic field provided from the magnetic field generating section to the first to third magnetic field change detecting sections changes as the rotor rotates, and the first to third magnetic field change detecting sections output three-phase signals that change in correspondence with the rotational angle of the rotor, and when the angular intervals between the corresponding adjacent pairs of the first to third magnetic field change detecting sections about the rotational center of the rotor in the circumferential direction of the rotor are defined as first, second, and third division angles, the first to third magnetic field change detecting sections are arranged in such a manner that the first to third division angles are different from one another.