Five-Level Switched H-9 with Reduced Capacitance Inverter without Boost Capacitor and Transformer

The proposed Reduced Capacitance H-9 Five-Level Switched Boost Capacitor Transformer-less Inverter has strong potential for next-generation renewable energy applications. Future enhancements involving AI-based control, advanced MPPT techniques, wide-bandgap semiconductor devices, hybrid energy storage integration, smart grid support, and real-time hardware implementation can significantly improve its efficiency, reliability, and scalability. These developments will make the inverter highly suitable for grid-connected photovoltaic systems, electric vehicle charging stations, microgrids, and other modern power electronic applications.   This brief introduces a five-level dynamic boost-switched capacitor inverter, controlled using the sinusoidal PWM technique. With this, it is found that the size of the capacitor and its ripple current are reduced. The load terminal of this inverter is virtually grounded through a filter capacitor, effectively mitigating the leakage current to well below the safety limit. The inverter achieves a peak efficiency of 97.00% at 255 watts. It also exhibits low harmonic distortion (THD): 34.18% for the pole voltage and a significantly lower 1.29% for the resistive load. For the input voltage of 40 volts, the fundamental output voltage achieved is 154.54 volts

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