| 摘要 |
PURPOSE:To simplify and miniaturize the device by controlling the duty of pulse signals supplied to the DC motor through pulse width modulation. CONSTITUTION:A deviation counter 1 compares target value fi and output fo fed back from the DC motor, and outputs deviation signals to a micro-computer 6. The micro-computer 6 recevies the deviation signals and a change with time of the signals, and transmits control signals to a pulse width modulation circuit 7 at the next stage as data optimum for driving the motor. The pulse width modulation circuit 7 controls the duty of pulses on the basis of digital signals inputted, and supplies it to the DC motor M. Accordingly, the constitution of a control section is simplified while the device is miniaturized as a whole. |
