A design method of PI controller for an induction motor with parameter variation

This paper proposes a novel design method of speed and current controller for an induction motor with the variation of system parameters. Our goal is to establish a reliable and stable PI gain selecting procedure against the mechanical and the electrical parameter variation of an induction motor using Kharitonov robust stability theory. Although the system parameters are varied within some specific range, the proposed PI controller guarantees the robust stability and the performance for vector controlled induction motor. The performance of proposed design method is proved by digital simulation and experimentation with high performance DSP based induction motor driving system.