| 摘要 |
PURPOSE:To simplify and miniaturize constitution of a rotation position detector, by a method wherein an AC voltage of a constant frequency is applied to a plurality of exciting coils of a stator to detect the current of the exciting coil changing corresponding to a rotation position of an iron core rotor. CONSTITUTION:An AC voltage having a constant frequency is applied to a plurality of exciting coils 2-1, 2-2 for a stator. If an iron core rotor 1, positioned eccentrically against the stator, turns, a current, detected directly by the exciting coils 2-1, 2-2 for the stator, produces a signal having the same frequency as that of a feed AC whose modulation changes corresponding to a rotor position. A difference processing is made through detection of the detected currents, and this causes a rotation position to be detected directly through the exciting coils for the stator without the use of a detecting coil. As a result, a constitution of a rotation position detector is simplified and miniaturized. |
