Fuzzy-PI Torque and Flux Controllers for DTC with Multilevel Inverter of Induction Machines

Norjulia Mohamad Nordin, Nik Rumzi Nik Idris, Naziha Ahmad Azli, Mohd Zaid Puteh, Tole Sutikno


In this paper the performance of flux and torque controller for a Direct Torque Control of Cascaded H-bridge Multilevel Inverter (DTC-CMLI) fed induction machines are investigated. A Fuzzy-PI with fixed switching frequency is proposed for both torque and flux controller to enhance the DTC-CMLI performance.  The operational concepts of the Fuzzy-PI with the fixed switching frequency controller of a DTC-MLI system followed by the simulation results and analysis are presented. The performance of the proposed system is verified via MATLAB/Simulink©. The proposed system significantly improves the DTC drive in terms of dynamic performance, smaller torque and flux ripple, and lower total harmonic distortion (THD).

DOI: http://dx.doi.org/10.11591/ijpeds.v5i2.6581

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