Motor control system

摘要

A motor control system including an A.C. supplied input convertor 1 and a motor convertor 16 interconnected by a D.C. link 3, the motor convertor being controlled in dependence upon the motor speed or torque and the input convertor being controlled to maintain a constant reactive input current. The result is constant KVAR drawn from the supply, and consequently an improved power factor, whilst still maintaining constant speed torque of the motor.