| 摘要 |
<P>PROBLEM TO BE SOLVED: To solve the problem that rotational speed of a motor becomes high with respect to target rotational speed and command voltage drops when rotation of the motor is detected if the motor with high rotatable minimum rotational speed shows low rotational speed, that delay occurs in follow-up of rotational speed of the motor due to influence of inertia with respect to a change of command voltage to the motor, and undershooting occurs since the change of command voltage precedes. <P>SOLUTION: The apparatus includes a rotational speed detecting means 2 detecting rotational speed of the motor 1, a voltage command part 3 commanding voltage to the motor, a starting control part 4 controlling starting of the motor and a feedback control part 5 controlling feedback by a difference between rotational speed detected by the rotational speed detecting means and target rotational speed. If rotational speed detected by the rotational speed detecting means is larger than target rotational speed when starting control of the motor is terminated and a system moves to feedback control, a feedback period is delayed and a change rate of command voltage is made small. <P>COPYRIGHT: (C)2009,JPO&INPIT |
