Abstract
Abstract the design of inverters has evolved significantly to meet the high requirements of the new technologies, such as the implementation of the HVDC link. This study aims to improve an Asymmetrical seven-level Hybrid Bridge Multilevel inverter. This improvement will upgrade the inverter from seven to nine level inverter. Consequently, this will increase the efficiency and reduces the THD, and improve the output waveforms. This will reduce the operating cost significantly without increasing the implementation cost. The topology of the traditional seven-level inverter did not utilize the circuit component to the optimum. That's why this new approach of optimizing the inverter configuration was chosen as the main topic of this research. Keywords cascaded, 9-levels, multilevel inverter.