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Implementation of 5 Phase 3 Level NPC Inverter using Space Vector Modulation

Affiliations

  • Department of EEE, SRM University, Chennai - 603203, Tamil Nadu, India

Abstract


Objectives: The implementation of five phase three level Neutral Point Clamped (NPC) inverter is illustrated using space vector modulation technique based on the optimized five vectors switching strategy. Methods/Analysis: In 5 phases 3 levels NPC inverter consists of 243 switching state vectors, which can be reduced to 113 states by optimized Space Vector Modulation (SVM) switching strategy. The system has 11 sectors, which is converted into 6 sectors in that sub regions can be identified by optimised technique in d-q voltage vector. Simulation results of the five phase three level neutral point clamped inverter using SVM verified using Matlab/Simulink. Findings: SVM utilities switching states among the available various redundant states to reduce the common mode voltage and capacitor balancing problem. Dwell time calculations for this proposed does not need of any lockup table and park transformation. It’s applicable for high power medium voltage, remote sensing and industrial applications. Novelty/Improvement: The 3level 5phase NPC inverter has improved power density of the machine, enhanced dissection of power source among the inverter legs, abridged amplitude and augmented frequency of the torque pulsation than the traditional inverters.

Keywords

Neutral Point Clamped Inverter (NPCI), Optimised Space Vector Modulation (OSVM), Pulse Width Modulation Method (PWM), Switching States.

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