CONTROL OF MOTOR ROTATION

摘要

PURPOSE:To shift from acceleration and decceleration interval to constant speed rotation interval producing less overshooting or undershooting, by performing P (proportional) control in the acceleration and decceleration interval and PI (proportional-plus-integral) control in the constant speed rotation interval. CONSTITUTION:A switch change-over signal generation section 25 generates signals to change over switches 26 and 36 in accordance with the driving mode of a motor. In the acceleration and decceleration interval a P control is performed where the switch 26 is opened and the control is performed only by the P control output from a P control section 14. In the constant speed rotation interval a PI control is performed where the switch 26 is closed and the I control output from I (integral) control section 15 is added to the P control output from the P control section 14 by an adder 35.