Robust and Motor Parameter Insensitive PI Controller Design for Field‐Oriented Controlled Induction Motor Drive

ABSTRACT The change in parameters during the operation of induction motor drives (IMD) results in detuning the PI controller values in the classical field‐oriented control (FOC), and it may affect the performance of IMD. This paper presents the design of simple single‐order or near‐to‐single‐order PI controllers for the FOC of IMD. The proposed method provides the benefits of a non‐oscillatory closed‐loop response. The proposed method gives the option of choosing the crossover frequency as an input in the design of the PI controller. Thus, proper high frequency can be chosen, which benefits fast transient response. Further, the designed PI controller parameters are insensitive to the motor parameter's variation due to its flat gain region in the obtained bode plot. The mathematical expressions are derived for the design of proposed controller parameters and are analytically tested by plotting the bode plots of the system. A simulation is performed on IMD with proposed, designed values of the PI controller in the FOC using MATLAB/Simulink. The performance of the system is verified in the normal and extreme‐case scenarios. The system is also tested for parameter sensitivity in normal and extreme scenarios of four‐quadrant operation. Further, experimental validation is carried out to support simulation results.