| Abstract |
The direct torque control (DTC) is one of the powerful, simplest, and fast response technique for high-performance industrial drives application. The conventional and virtual vector (VV) based DTC has been successfully extended for the pre-fault operation of five-phase induction motor (FPIM) drive recently. For the fault-tolerant FPIM, the implementation of DTC is a challenging task to operate the motor with loss of one phase (open-phase fault). To eliminate, the distorted stator currents in FPIM with distributed winding, the third harmonic voltage need to eliminate. For this, the VV concept has been used. In this paper, the DTC technique for a two-level inverter-fed FPIM drive with an open-phase fault has proposed with a modified look-up table. It is based on the VVs concept and its theoretical analysis. The theoretical analysis figured out the VVs impact on change in torque as well as flux response with different speed and loading conditions. From this analysis, the modified look-up table has been constructed. The MATLAB/Simulink results are provided to verify the proposed controller effectiveness under the post-fault situation with an open-phase fault. |
