| 摘要 |
PROBLEM TO BE SOLVED: To constitute a positioning drive device simply and inexpensively in terms of a structural technique. SOLUTION: A motor 1, 2 is constituted of a brushless DC motor. The DC motor has one position sensor 3 and a plurality of sensors (S1, S2, S3) connected to a commutation control part 4. A position sensor estimating part 5 is connected ahead of a positioning control part 6 and also connected to the sensors (S1, S2, S3). An actual position of an element driven by the rotor 1 is detected from signals of the sensors (S1, S2, S3) by the position sensor estimating part. |
