| 摘要 |
PURPOSE:To realize the control method which makes the rotation of a rotor for a commutatorless motor smooth during one cycle (one rotation) and whose cost is low. CONSTITUTION:A microcomputer 9 divides one cycle (one rotation) of a rotor 1a for a commutatorless motor 1 into a plurality of sections by the position detection signal of the rotor 1a, it detects rotational speeds of the rotor 1a in the desired sections, it computes the mean value of the rotational speeds in the individual sections according to the difference between the rotational speeds in the individual sections and the means value, it changes the variable ratio of a voltage applied to every winding in order to change the rotational speeds in the individual sections into the means value, and it can maintain the rotational speeds in the individual sections at the mean value even when the load of the commutatorless motor is changed. |
