Volume 20 No 20 (2022)
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DESIGN AND DEVELOPMENT OF SWITCHED CAPACITOR MULTILEVEL INVERTER WITH SPWM TECHNQUIE
Ms. Anusha P, Dr. Pusha
Abstract
Since fossil fuels have been depleting at an alarming rate, renewable energy has been on the rise in recent decades. However, the DC currents that will power our homes and businesses from these sources are still decades away. The vast majority of uses need for an AC connection. The process of changing direct current to alternating current has arrived. There is the usage of an inverter, a circuit that changes DC power into AC power. The inverter's efficiency is negatively impacted by the high total harmonic distortion % caused by the inverter's output harmonics. Multiple DC voltage levels may be generated using a Multi-Level inverter, which can also be employed in high-power and high-voltage applications. With lower harmonic distortion, this produces decent value output. A switched-capacitor frontend and an H-Bridge backend are provided for a cascaded capacitor-switched multilevel inverter that makes use of the SPWM approach in this research. With the frontend, voltage may be switched between series and parallel at a greater range of values than before. Increasing voltage levels is an effective way to reduce harmonic distortion. In contrast to traditional multicarrier modulation, the suggested symmetrical triangular waveform modulation may be implemented directly in analog and has a low modulation frequency. All aspects of the network architecture, including the routing protocol, the parameters used in it, the symmetry of the modulation, the Fourier analysis of data, the frequency of network operations, and the efficiency of the topology, are examined. The simulation results are then compared to those obtained in an experiment with a rated output frequency of 25 kHz. In addition, a low-power prototype model has been produced.
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