A new synthesis method for efficiency optimized speed control system of vector-controlled induction machine

Abstract

An efficiency optimization is carried out for an induction machine, treating it as a three-input, two-output controlled object. The condition for maximum efficiency is analytically derived as the ratio of control input and the state variable of state equations in a synchronously rotating reference frame. A synthesis method that attains maximum efficiency and very fast response by simultaneous vector control and speed control is proposed. Simulation results for an equivalent DC model are reported that show the effectiveness of the method.<>