An advanced disturbance reduction field-oriented control for six-phase induction machine

These days multiphase induction machines are being considered for various applications in transportation and power sector. This is because of their capability to achieve enhanced power when compared to its three-phase counterparts. In addition to this, a multiphase drive improves the reliability at the system level, thus contributing to overall system efficiency. An efficient control strategy is necessary to operate a multiphase induction motor drive in variable speed. Variation in load torque causes speed disturbance to any machine drive operating in closed loop, consequently affecting the system performance. This paper, therefore, proposes a simple and elegant rotor field oriented control (RFOC) methodology for a six-phase induction motor (SPIM) with 30°phase displacement between the two three-phase winding sets. Proposed RFOC consists of an additional loop for the resilient speed control under input load disturbances without any additional PI controllers. A detailed dynamic modeling of SPIM with vector space decomposition (VSD) SVPWM is presented in the paper. In order to verify the effectiveness proposed RFOC, necessary simulation results are provided using MATLAB/SIMULINK software and experimental analysis is performed on 1.5 hp induction machine.