Abstract
It presents a five-level PWM inverter using an isolated Half-bridge circuit configuration. Compared with a conventional cascaded H-bridge multilevel inverter synthesizing five-level on output voltage wave, the proposed approach generates the same voltage levels using an isolated Half-bridge configuration adding a switching device and a diode. Hence, it can reduce the number of switching devices up to three resulted in reduction of switching loss and conduction loss. Additionally, it just employs a single dc voltage source whereas the conventional approach needs two independent dc voltage sources. Moreover, it improves reliability and stability by applying a transformer ensuring a galvanic isolation between a dc voltage source and the output. To verify the validity of the proposed multilevel inverter, we carry out a computer- aided simulation.
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