Application of type-2 fuzzy logic controller to an induction motor drive with seven-level diode-clamped inverter and controlled infeed

摘要

This paper describes a new control method for the integrated of six current rectifiers - seven-level diode-clamped inverter feeding induction motor considering dc-link capacitors voltage balancing problem. The proposed controller uses type-2 fuzzy systems to compensate the fluctuations of capacitors voltage, draw a sinusoidal line current with nearly unity power factor, and ensure the motor speed control. The performance of dc-link voltages control is evaluated in comparison to the conventional PI control scheme. The overall system and the control algorithm are presented and a set of simulations is carried out in order to prove the good performances of the proposed solution.