Kim-Sul Algorithm Based FOC for Electronic Pole Changing Induction Motor Drive in EV Applications

Usage of induction motor drive (IMD) with electronic pole changing (EPC) technique is becoming popular for the electric vehicle application. EPC technique extends operating torque and speed range of the induction motor. It provides high starting torque and wider speed range with lower torque. Ability to change the number of poles during running condition, also eliminates the requirement of the mechanical gear box generally required for getting wider torque and speed range. However, having a wider range of the speed and torque is not enough for the IMD. A proper high-performance control is also required for such electronics pole changing induction motor drive (EPC-IMD). In this paper field-oriented control (FOC) for electronic pole changing induction motor drive (EPC-IMD) is proposed. The given FOC is implemented on EPC-IMD, having three-phase, twelve-pole (3-ph,12-P) and nine-phase, four-pole (9-ph,4-P) operation. The proposed FOC uses Kim-Sul algorithm for the generation of the PWM, which further gives additional degree of freedom for the control. It also provides accurate speed control with improved torque response. All the details with respect to modelling and implementation of FOC are given in the manuscript. MATLAB/Simulink results are also presented to show the performance of the proposed FOC in the given EPC-IMD.