Tehnički vjesnik, Vol. 32 No. 6, 2025.
Izvorni znanstveni članak
https://doi.org/10.17559/TV-20241209002181
Novel Modular Multilevel Inverter Structures with Reduced Components for Medium Voltage Applications
R. Gandhi Raj
; Department of Electrical and Electronics Engineering, University College of Engineering (BIT Campus), Anna University, Tiruchirappalli, Tamil Nadu, India
P. Prakash
; Department of Electrical and Electronics Engineering, K. Ramakrishnan College of Technology (Autonomous), Trichy, Tamil Nadu, India
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* Dopisni autor.
Sažetak
Multilevel inverters (MLIs) are increasingly prominent in medium-voltage and high-power applications due to their ability to produce output voltages with reduced harmonic distortion and lower device blocking voltage. By employing isolated voltage sources, clamping diodes, and flying capacitors, MLIs generate terminal voltages in incremental steps, mimicking a sinusoidal waveform. However, the cascaded structure often requires a higher number of power components as voltage levels increase, resulting in elevated implementation costs. To address these challenges, this article introduces two novel modular MLI structures that utilize fewer semiconductor switches and DC sources to achieve the desired voltage levels efficiently. Each structure employs four DC sources and a reduced number of switches to synthesize stepped voltages at the load terminals, providing a cost-effective and modular solution. The feasibility of the proposed structures is demonstrated through a detailed comparison with recent reduced-component MLI configurations in terms of controllable switches, gate isolators, current-conducting switches, and power loss. The designs are validated using MATLAB/Simulink simulations, and their practicality is confirmed through real-time performance analysis using a laboratory prototype. The results show strong agreement between simulated and experimental findings, confirming the proposed designs' effectiveness.
Ključne riječi
harmonic distortion; MATLAB/simulink validation; modular structures; multilevel inverters (MLI); reduced component design
Hrčak ID:
337716
URI
Datum izdavanja:
31.10.2025.
Posjeta: 447 *