DEVICE AND METHOD FOR SENSORLESS DETECTION OF THE LOAD TORQUE OF A STEPPER MOTOR AND FOR OPTIMIZING THE CONTROL CURRENT FOR EFFICIENT OPERATION

摘要

A method for controlling the drive current in a stepping motor includes measuring the stepping motor current, calculating a load angle of the stepping motor, calculating a torque ratio of the stepping motor, generating a reference current as a function of the torque and a maximum current setting of the stepping motor and setting the driving current of the stepping motor in Dependence on the reference current.