| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a rotation information detecting apparatus of a DC motor for accurately detecting rotation information of the motor even if the motor is used for an application for frequently activating and stopping the motor. <P>SOLUTION: The rotation information detecting apparatus, for detecting the rotation information of the motor M based on a surge component waveform superimposed on a voltage waveform across terminals of the DC motor M, includes a means for supplying the motor M with a current of Ipwm 45% during a normal rotation and Ipwm 55% during a reverse rotation for a period from a start to a stop of a braking operation of the motor M. <P>COPYRIGHT: (C)2006,JPO&NCIPI |
