International Journal of Engineering and Technology

A cascaded H-Bridge Seven level inverter using low frequency transformer with single DC source is proposed. The proposed configuration reduces the complexity in design and modularity when compared to conventional method which also provides reduced switching losses and harmonics. A multilevel shifted carrier based sinusoidal PWM switching scheme is utilised to reduce the complexity in control design. Therefore an identical H-bridge module is used to improve manufacturability and modularity. The circuit performance is simulated using PSIM and experimental results are tested using laboratory prototype.