Minimization of Flux and Torque Ripples of FPOEW Induction Motor with FCS-MPTC using Synthetic Voltage Vectors
Keywords:
Three-Level Direct torque control (TL-DTC), Five-Level Direct torque control (FL-DTC), Finite-Control Set Model Predictive Torque Control (FCS-MPTC), Virtual Voltage Vectors(VVV), Synthetic Voltage Vector (SVV)Abstract
This paper introduces a new topology for five-phase OEWIM using Finite Control Set Model Predictive Torque Control (FCS-MPTC). This topology shows the enhancement in the steady-state performance by reducing flux and torque ripples and minimizing the percentage of total harmonic distortion (%THD) in stator current. The FCS-MPTC scheme proposed here employs a shared DC link for both inverters, ensuring zero common mode current, thereby eliminating the need for a large isolation transformer. This topology generates Synthetic voltage vectors (SVV) which result from the vector summation of the individual inverter virtual voltage vectors. Common Mode Voltage (CMV) across the motor windings is nullified using this topology. Another notable aspect of FCS-MPTC is its ability to suppress high harmonic currents through the windings by reducing the average voltage in the non-torque-producing plane (x-y plane). Experimental validation compares the effectiveness of FCS-MPTC against traditional Three-Level Direct Torque Control (TL-DTC) and Five-Level Direct Torque Control (FL-DTC) methodologies
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