MOTOR CONTROLLER, RECORDING DEVICE, AND MOTOR CONTROL METHOD

PROBLEM TO BE SOLVED: To control a motor by PWM control for obtaining satisfactory follow-up performance in an adjustable-speed region. SOLUTION: A proportional element 461 outputs a value, where the speed deviation between target rotational speed and rotational speed is multiplied by a proportionality constant Gp (proportional gain), as proportional term output Tp. A differential element 463 outputs a value, where the difference between speed deviation in control n times before and that in this control is multiplied by a differential constant Gd (differential gain), as differential term output Td. An integral element 462 adds a value, where the speed deviation between the target rotational speed and the rotational speed is multiplied by an integral constant Gi (integral gain), to a value, where the speed deviation between the target rotation speed in the last control and that in this control is multiplied by a correction constant Gv (speed correction gain). The integral element accumulates the added value and outputs a value, where an integral initial value is added to the accumulated value, as integral term output Ti. COPYRIGHT: (C)2009,JPO&INPIT