| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a rotor position detection device which can accurately detect a rotor position of a permanent magnet motor using a low-cost magnetic detection sensor. <P>SOLUTION: When a permanent magnetic motor 1 is configured by positioning two kinds of magnets of different magnetic forces, a neodymium magnet and an alnico magnet, in a rotor, a speed/position detection part 55 detects a rotational speed of the permanent magnetic motor 1 using three hole sensors 68 (A, B, C) and detects the rotor position based on the rotational speed. A speed/position correction part 80 corrects the rotational speed or the rotor position detected by the speed/position detection part 55 from the change state of a sensor signal output by the hole sensors 68. <P>COPYRIGHT: (C)2012,JPO&INPIT |
