| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a motor driving device that inexpensively executes highly-accurate drive by correcting a magnetization error while executing sensorless drive of a brushless motor. <P>SOLUTION: When reaching a prescribed rotation frequency after starting a motor, a controller 2 issues a fixed-speed command to a speed control part 8. The speed control part 8 waits for a measurement command from the controller 2 while executing fixed-speed control. Then, the speed control part generates and stores a correction-speed reference signal from a speed reference signal, having a fixed period, corresponding to speed information generated by measuring a zero-cross period in one electrical angle starting from a specific excitation phase of a drive part 1 and the fixed-speed command from the controller 2. The speed control part generates a speed-error signal from the correction-speed reference signal and the speed information so as to execute speed control output to the drive part 1. <P>COPYRIGHT: (C)2009,JPO&INPIT |
