| 摘要 |
PURPOSE:To reduce rotation unevenness and stabilize the rotation of a motor substantially by a method wherein a processing part which processes a correction function having a detected rotation position as a parameter and a correcting part which corrects a transfer function having the revolution of the motor as a parameter with the processed correction function are provided. CONSTITUTION:A rotation position detecting circuit 11 detects the number of signal pulses of a revolution omega counted from a time when a reference pulse rises as a reference every time when the pulse signal of the revolution omega is detected and the number is outputted as the signal of a rotation position theta. If the signal of the revolution omega and the signal of the rotation position theta are inputted to a first processing part 9 and a second processing part 12 respectively, a transfer function f(omega) is calculated by using the signal of the inputted revolution omega and a correction function g(theta) is calculated by using the inputted rotation position theta and the calculated results are added by an adder 20. With this constitution, the transfer function f(omega) is corrected by the correction function g(theta). |
