Adaptive induction machine current control using internal model principle

The inner loop current control plays a key role in the high performance sensorless induction machine control. An adaptive current control scheme for the induction machine is proposed in this report. After employing nonlinear feedforward decoupling technique the controller is constructed along with internal model principle to gain zero steady state error of the machine stator currents. The dead-zone technique is utilized in the gradient adaptive law to enhance the robustness of the control system. The simulation results carried out with MATLAB/SIMULINK are presented to show the effectiveness of the closed-loop current control system.