| 摘要 |
PROBLEM TO BE SOLVED: To solve a problem of unstable drive caused by an error between an actual rotor position and a sensor signal output, since the sensor output of a motor with a position sensor is affected by coil excitation. SOLUTION: The motor has a rotor with a permanent magnet, a stator having two coils, and a control means that independently controls excitation of the two coils. The stator has first (2) yokes excited by each coil and a first (2) detection means that detects magnetic flux; the first yoke is disposed at every electric angle 360°, the second yoke is disposed at the electric angle position of 90°from the first yoke, and the first (2) detection means is disposed at the same position as one of the first (2) yokes; and the control means generates an excitation switching signal of each coil to excite the corresponding coil, acquires a first (2) delay angles based on the latest polarity change time of detected signals of the first (2) detection means when the excitation switch signal of each coil is generated, and generates the excitation switching signal using the first (2) delay angle for each detection signal. COPYRIGHT: (C)2011,JPO&INPIT |
