| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a motor dive capable of being restarted without the need for lowering the rotational speed of a motor as much as possible even if the motor falls into an idle state. <P>SOLUTION: A control part, if it is detected that a prescribed failure occurs in a control system ("YES", step S2), stops the driving of the motor with an inverter circuit (step S3), estimates a rotational position θ of the motor during a driving stop period TO on the basis of rotational angular frequency ω estimated by a magnetic pole position estimation part at this point (steps S4 to S6), and restarts the driving of the motor after the elapse of a prescribed time (step S7). <P>COPYRIGHT: (C)2005,JPO&NCIPI |
