| 摘要 |
<P>PROBLEM TO BE SOLVED: To stop a motor completely during a stop period when the motor is rotated at an extremely low speed by controlling the current of the motor. <P>SOLUTION: Driver elements Q1-Q4 supply a drive current to a motor, and a gate circuit 51 supplies a gate signal to the driver elements Q1-Q4 such that the drive current has a value corresponding to a command value. A current regulating section supplies command values sequentially to the gate circuit 51 and sets the current values alternately in a first current value range where the motor does not rotate and a second current value range where the motor rotates. When the rotation of the motor reaches a predetermined value in a predetermined period, the gate circuit 51 is controlled to turn the driver elements Q1-Q4 off continuously to the end of the predetermined period. <P>COPYRIGHT: (C)2008,JPO&INPIT |
