| 摘要 |
PURPOSE:To prevent an excess over currents required for acceleration and deceleration of peak currents, and to reduce noises and the vibrations of a device by controlling applied voltage on the basis of a speed command signal, a signal indicating a driving mode and a counter-electromotive voltage signal. CONSTITUTION:A signal Vc from a speed deviation detector 5, a mode indicating signal (m) and a counter-electromotive voltage signal Vm for a motor 1 are inputted to a motor applied-voltage computing element 11, and the computing element 11 conducts required arithmetic operation on the basis of these signals. A voltage control signal Vcv outputting optimum voltage Vv to be applied to the motor 1 and a polarity control signal VD for the motor are outputted from the motor applied-voltage computing element 11. Accordingly, peak currents fed to the motor do not exceed current values necessary for accelerating and decelerating the motor, thus reducing noises, then minimizing the vibrations of the device. |
