| 摘要 |
PURPOSE:To obtain a smooth rotation by altering the period of a pulse together with the width of a pulse supplied to a DC servo motor in response to the amplitude of an error signal. CONSTITUTION:An error signal applied to an error signal input unit 14 is input through a comparator 5 and an inverter 7 to a comparator 6. A reference wave generator 8 applies triangular waves having different peak values to the comparators 5, 6. The comparators 5, 6 compare the both signal inputs, and apply normal and reverse rotation control pulses to a motor driving power pulsating unit 3. When the error signal is large, the comparators 5, 6 output for the triangular waves of the peak values (a), (b). If the error signal becomes small, the comparators 5, 6 generate outputs only for the triangular waves of the peak value (a), and output control pulses of small pulse width and large period. |
