| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide electrically powered equipment which can control commutation at an optimum lead angle in both positive rotation and reverse rotation and can correspond to rapid load fluctuation. <P>SOLUTION: Electrically powered equipment A is provided with a motor 1, a change-over switch 6 for switching a rotation direction of the motor 1, a control circuit 3 outputting a normal rotation signal or a reverse signal in accordance with a switch signal from the change-over switch 6, a driving circuit 2 which normally rotates or reversely rotates the motor 1 in accordance with the normal rotation signal or the reverse signal from the control circuit 3, and a rotor position detection sensor 5 detecting a rotor position of the motor 1 and outputting a sensor signal corresponding to the detected rotor position to the control circuit 3. The control circuit 3 decides a commutation pattern to respective coils of the motor 1 in accordance with the sensor signal and controls the lead angle by the decided commutation pattern. When the next sensor signal is inputted prior to commutation corresponding to the sensor signal after the sensor signal is inputted, the lead angle is set to 0° and commutation corresponding to the next sensor signal is performed. <P>COPYRIGHT: (C)2010,JPO&INPIT |
