An Improved Single Phase Self-balancing Switched Capacitor Based Step-up Nine Level Inverter

Abstract

The improved single phase switched capacitor based nine level inverter is presented in this article. A low DC input voltage is transformed into AC and boost up to the high output voltage without any Boost converter, inductors, transformers. The self-balancing process is involved in the states of charging and discharging of the capacitors. The presented topology does not have any H-bridge configurations which result in the low Total Standing Voltage (TSV). The Phase Disposition Carrier based PWM (PDCPWM) control technique is applied to the presented nine level inverter. The conduction loss, switching loss, efficiency and capacitor ratings are analyzed mathematically. The comparative analysis of the number of semiconductor switches, Total Standing Voltage, Peak Inverse Voltage between the presented topology and existing topology is explained in detail. Finally, using MATLAB/SIMULINK the proposed nine level inverter is simulated to realize the performance of the presented topology.