Single Dc Switched Capacitor 27 Level Multi-Levels Using Fuzzy Logic

Abstract

Recently, multilevel inverters have become more popular for high-power applications, particularly in the automotive industry. Their primary disadvantages are their complexity, which necessitates the use of a greater number of power devices and sophisticated control circuitry. An H bridge output stage with three bidirectional auxiliary switches has been utilised to create a novel 27-level inverter architecture in this work, which uses a fuzzy logic controller as its controller. The adaptive nature of the fuzzy logic controller allows it to function in a closed loop environment without the need for a mathematical model. In this S3CMcircuit setup, the inverter generates 27 different levels, one of which is the zero level. When compared to the S3CMsystem with PID and the S3CMsystem with PDPWM, the new architecture results in a substantial reduction in the number of power devices (12 switches) and capacitors needed to create a multilevel output. With the help of a fuzzy logic control system, the total harmonic distortions produced by a multilayer inverter have been significantly decreased. The most significant characteristic of these inverters is that they have a low overall harmonic distortion. The harmonics distortion has been minimised in this S3CM study by using a Fuzzy Logic Control method, which has resulted in an improvement in the performance of the multilevel inverter. A simulation has been carried out in the Matlab-Simulink environment, and the results of the simulation have been gathered. The findings demonstrate the efficacy of the S3CM technique, which was designed for harmonic suppression purposes.