ANALYSIS AND DESIGN OF HYBRID ACTIVE MULTI-LEVEL INVERTER TOPOLOGY FED INDUCTION MOTOR DRIVE

Electrical and Electronics Engineering

This paper proposes a new five-level hybrid topology combining features of neutral point clamped and flying capacitor Multi-level inverters. The proposed topology provides a tradeoff between different component counts to achieve a good loss distribution, avoid direct series connection of semiconductor devices, keep the balanced operation of dc-link capacitors while keeping the number of costly components such as capacitors and switches low. The Pulse width modulation strategy for this hybrid topology has designed using modified SVPWM technique. The features of the proposed topology are investigated and compared to other available topologies. Simulation results are provided to verify the performance of the converter for medium voltage applications. Performance of the proposed technique under different operating conditions is investigated in the MATLAB/Simulink environment with R-L load initially and extended with Induction motor load. The operation of the proposed topology is studied for Line, Phase voltages and THD.

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