| 摘要 |
PURPOSE:To provide a speed controller for a motor having characteristics, in which there is no unevenness of rotational speed. CONSTITUTION:A speed error detector 4 compares a rotational period signal from a frequency generator 3 and a target period signal and outputs an error signal, and a speed control circuit 5 outputs a torque signal to an adder 10 so that the error signal of the speed error detector 4 is eliminated. A torque pattern generating circuit 9 outputs the torque pattern signal of a pattern denying the torque ripple of a motor 1 to the adder 10 while being synchronized with the output signal of a conduction synthetic circuit 8 and the output signal of the frequency generator 3. A driver circuit 2 generates torque corresponding to the signal of the adder 10 in the motor 1, thus preventing the effect of the torque ripple, then acquiring a speed controller for the motor having excellent characteristics, in which there is no rotational unevenness. |
