| 摘要 |
PROBLEM TO BE SOLVED: To maintain the stop of ration of a DC motor electrically, without providing a mechanism by performing a control for maintaining the duty of the pulse signal to a predetermined value in maintaining the stop of rotation of a DC motor. SOLUTION: Outputs from a speed compensation processing section 203, start PWM value installation section 204, and position compensation processing section 205 in the software configuration are inputted to PWM output circuit 300, respectively. From the PWM output circuit 300, pulse signal of predetermined duty for driving a DC motor 2 is output, based on each data of respective PWM output circuit. This pulse signal is input to the DC motor via a flow- through current prevention circuit 304, a current control circuit 305 and a driver circuit 306. That is, the DC motor 2 will be made to rotate at a rotating speed, corresponding to the duty of the pulse signal output from the PWM output circuit 300. Thus, if it is controlled for maintaining the duty of PWM signal to 50%, the stop state of the DC motor can be maintained. |
