Robust speed control of interior permanent magnet synchronous machine “fractional order control”

Abstract

The parameter sensitivity is a major cause of AC drives to stop working optimally. This paper looks into fractional order controller for Interior Permanent Magnet motors. The interior permanent magnet motors have become more demanding in hybrid vehicles, for which the parameter (resistance, inductance, magnetization of permanent magnets) drift is a common cause of degradation of drive due to rise in ambient temperature. The fractional PI/PID controller, which has five degree of freedoms, compared to classical PI/PID which have three degree of freedoms. This paper presents the simulations of fractional order controller (PI) based on fractional order calculus, for robust speed control of the Interior permanent magnet motors. The fractional order controller is compared with the well-tuned PI controller. The analysis constitutes the big range of parameters drift of the motor, to compensate the range of actual drift in the parameters.