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Novel Hybrid Multilevel Inverter with Minimum Number of Switches

J. Rahila, A. Kannabhiran, V. Ayyappan

Abstract


This paper proposes a novel trinary hybrid multilevel inverter for medium voltage applications. The main disadvantage of the conventional topology is the large number of power supplies and semiconductors required to obtain multistep voltage waveforms. The proposed topology significantly reduces the number of IGBTs and their gate driver circuits as the number of output voltage level increases. Single carrier sinusoidal modulation (SC-SPWM) technique is used in this topology which provides variable voltage and variable frequency operation. The proposed inverter can synthesize high quality output voltage near to sinusoidal waves. The circuit configuration is simple and easy to control. The operational principle and key waveforms are illustrated and analyzed. To validate the proposed topology, the circuit is simulated and verified using MatLab/Simulink.

Keywords


Hybrid Multilevel Inverter, Single Carrier Sinusoidal Pulse Width Modulation (SC-SPWM), Trinary DC Sources.

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References


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