An Improved DTC Technique for Three-Level NPC VSI Fed Five-Phase Induction Motor Drive to Eliminate Common Mode Voltage

Bheemaiah Chikondra,Utkal Ranjan Muduli,Ranjan Kumar Behera

doi:10.1109/npec47332.2019.9034720

Bheemaiah Chikondra, Utkal Ranjan Muduli + Show 1 more

https://doi.org/10.1109/npec47332.2019.9034720

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Publication Date: Dec 1, 2019

Citations: 32

Affiliation: Indian Institute of Technology Patna

Abstract

This paper proposes a virtual vector (VV) based common mode voltage (CMV) elimination method for direct torque control (DTC) of three-level neutral point clamped voltage source inverter (THL-NPC VSI) fed five-phase induction motor (FPIM) drive. Consequently, the proposed method will improve the leakage current in bearings and distortion in the stator currents. This is achieved by selecting 51 out of 243 voltage vectors, which will give zero CMV. Out of 51 voltage vectors, only 31 vectors are used to form as VVs to develop look-up table for DTC operation. The collative results are provided to show the superiority of the proposed method over the existed approach. The simulation and OPAL-RT based hardware in loop (HIL) results are provided to validate the proposed method in both steady-state and dynamic conditions.

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