| 摘要 |
PURPOSE:To increase the speed variation width of a speed controlling device for a motor by interposing a non-linear circuit in a feedback passage, in the range from the low speed to high speed and to increase the speed controlling range. CONSTITUTION:A non-linear circuit 6 is interposed in the feedback passage from a DC tachometer generator 5 to a comparator 1, the rotating speed per unit voltage with respect the speed set signal es is increased when the rotating speed is high, and the rotating speed vs. torque characteristics is set as shown when it is reversely low. When the speed variation width with respect to the torque Ts become X1 at the low speed time N1 and become Y1 at high speed time N2, and the speed variation width Y1 at high speed time becomes larger than that X1 at the low speed time. |
