Abstract
Nowadays, the application of two-level and multi-level Voltage Source Inverter (VSI) in electric drives is well established. However, Multi-Level Inverter (MLI) has several operational advantages such as voltage stress reduction across power electronic switch and power quality improvement. It is also advantageous considering motor operation, such as improved response of flux, torque and current. Hence, proving its suitability for high power Electric Vehicle (EV) application performing smooth operation. Concerning EV application, the particular selection of MLI structure should have features of simple, ready accessible and hybrid source operation. In this paper, dual VSI is selected for multi-level operation supplying to PMSM drive, owing to its operational and structural advantages. Using emerging Predictive Torque Control (PTC) technique, PMSM drive is operated in two-level and multi-level modes. Matlab/Simulink simulations are performed for PMSM drive operation and results are compared for two-level and multi-level PMSM drive. Thus, benefits of MLI operated PMSM drive are validated with regard to flux and torque ripple, voltage and current response over two-level inverter operated PMSM drive.
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