Single-Phase Simplified Split-Source Inverter (S3I) for Boost DC-AC Power Conversion

The single-phase split-source inverter (SSI) is an emerging and attractive topology for a boost dc-ac power conversion system. Such as an inverter features high compactness, although at the expense of high-frequency commutations across the diodes. The corresponding hybrid pulsewidth modulation (PWM) also confines the voltage harmonics to concentrate around the switching frequency and its multiples. This paper proposes a simplified SSI, which is realized by inserting only one power switch into an H-bridge. While generating the ac output, the newly developed PWM strategy ensures the inductor charged with constant duty cycle. When compared to the existing SSIs, it offers the added benefits of reduced switch count, enhanced voltage-boosting gain, reduced output filter requirement, and enhanced power efficiency. Comprehensive steady-state analysis is discussed while simulation and experimental results are subsequently presented to prove the validity of the proposed topology and the PWM strategy.