DRIVE CONTROL METHOD FOR VARIABLE RELUCTANCE TYPE MOTOR

摘要

A drive control method for a variable reluctance type motor enabling the prevention of the generation of a disturbance torque and the improvement of the efficiency of the motor. In function generators (8A-8C) of the control equipment where the method is adopted, the rotational direction and operation mode of the motor are determined, based on the order of the generations of A-phase and B-phase feedback pulses fed from a pulse coder (7) and the sign of a torque command (Tc) fed from a velocity loop compensating circuit (1) and one of four current application patterns is selected in accordance with the result of the determination. According to the selected pattern, function signal values corresponding to a real electrical angle ( THETA ) of the motor are sent from the function generators and current application to the respective phases of the motor (6) are controlled by power amplifiers (4A-4C) responding to the voltage commands derived from the function signal value. The current application stopping time is so set as to eliminate a winding current before a disturbance torque is generated by the current flowing through the stator winding which is caused owing to the inductance of the stator winding after the current application stopping. Thereby, the generation of the substantial disturbance torque is prevented.