Soft switching interleaved active clamp flyback inverter for a photovoltaic AC module system

A soft switching interleaved active clamp flyback inverter for a photovoltaic AC module system is proposed. The proposed system includes an interleaved active clamp flyback converter and an unfolding bridge inverter. The interleaved active clamp flyback converter has the advantages of zero voltage switching (ZVS) performance for the primary switches, reverse-recovery problem alleviation for the secondary output diodes and small input current ripple. Furthermore, each switch in the flyback converter operates with a high efficiency point along with an output power using a new optimal control method. Therefore, high efficiency and high power density conversion can be achieved in a with input voltage range by employing the proposed system. In order to verify these, theoretical analysis and simulation are performed.