| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a control device for a motor in which, even in the case where an instantaneous interruption occurs in an AC power source, occurrence of step-out in the motor can be accurately detected and performances of the motor can be completely effectively utilized.SOLUTION: In the case where the number of times of discriminating the presence of a spike detection signal generated by using second spike voltage generation time detection means is equal to or less than the predetermined number of times when rising or falling of the spike detection signal cannot be detected, a control section 11 determines that a step-out does not occur in a brushless DC motor 200. In the case where the number of times of discriminating the presence of the spike detection signal exceeds the predetermined number of times, the control section 11 reads out a first spike voltage generation time finally detected and stored by using first spike voltage generation time detection means. When the state where the read first spike voltage generation time is equal to or longer than a predetermined time judging step-out is continued predetermined times, the control section 11 determines that a step-out occurs in the brushless DC motor 200.</p> |
