SERVOMOTOR CURRENT CONTROL METHOD, CURRENT CONTROL PROGRAM, RECORDING MEDIUM, SERVOMOTOR, AND INJECTION MOLDING MACHINE

摘要

as a current control method for passing the d-axis current to prevent the occurrence of voltage saturation , d -axis current ( Id) = - | Idmax | sin and defined by , each of the voltage command value and voltage command value is performed periodically with a predetermined constant to compare the threshold (Vo), temporally extracting a comparison result of a predetermined number of times immediately before (No times) each voltage command value by the number of times when at least one voltage command value exceeds the threshold value (Vo) is less than (N) is set integer (Nb) of the phase angle in the = 0 , and the number (N) is an integer ( If you exceed Nb) greater number (N) is to increase the the phase angle ( ).