A New Hybrid Multilevel Inverter Topology with Reduced Switch Count and dc Voltage Sources

Hussain Mohammad Bassi and Zainal Salam
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Hussain Mohammad Bassi: Department of Electrical Engineering at Rabigh, King Abdulaziz University, Jeddah 25732, Saudi Arabia
Zainal Salam: Centre of Electrical Energy Systems, Department of Electrical Power Engineering, Universiti Teknologi Malaysia, 81310 Johor Bahru, Malaysia

Energies, 2019, vol. 12, issue 6, 1-15

Abstract: In this paper, a new single-phase hybrid multilevel inverter (MLI) is proposed. Compared to other existing MLI topologies, the proposed circuit is capable of producing a higher number of output voltage levels using fewer power switches and dc sources. The levels are synthesized by switching the dc voltage sources in series/parallel combinations. An auxiliary circuit is introduced to double the number of levels by creating an intermediate step in between two levels. In addition, a zero level is introduced to overcome the inherent absence of this level in the original circuit. To improve the total harmonic distortion, a hybrid modulation technique is utilized. The operation and performance of the circuit are analyzed and confirmed using MATLAB/Simulink simulation. To validate the workability of the proposed idea, a 300 W, a thirteen level MLI (including the zero level) is designed and constructed. The circuit is tested with a no-load, resistive load and resistive-inductive load. The experimental results match very closely with the simulation and mathematical analysis.

Keywords: multilevel inverter; dc-ac power converter; PWM technique; power conversion (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2019
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (7)

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