Abstract:

Industrial drives use multilevel inverters (MLI) in a variety of ways. MLI applications in industrial drives have multiplied dramatically over the past 20 years. But, for more efficiency and dependability, we always require fewer devices. A Multilevel Inverter (MLI) output voltage can be adjusted using several modulation techniques. Intensive study is underway to reduce the number of DC power supplies and switches used in Multilevel Inverter without minimize the number of output levels. To increase the power handling capacity without purchasing new converters, MLI's modular design is implemented. This project demonstrates a cascaded H-bridge (CHB) converter with a decreased switch count that generates a seven-level output from a single stiff DC source (battery). To get a better output voltage waveform, gate pulses for the switches have been generated using the nearest level control (NLC) pulse-width modulation technology. The provided mathematical analysis is supported by simulation and experimental findings. The fluctuation of total harmonic distortion (THD) with modulation index is also investigated.

Description:

Cascaded H-bridge (CHB) converter, MATLAB, Nearest level control (NLC), Total harmonic distortion (THD), Multilevel Inverter (MLI).