A single-input extended multilevel inverter based on switched-capacitor with reduced number of devices

The existing multilevel inverter (MLI) has problems such as a large number of devices, complex structure, and voltage stress the semiconductor. These shortcomings are not conducive to modularization, high efficiency miniaturization inverter. Therefore, topology extended switched capacitor utilizing single power supply is proposed. In which, used virtual supply, through switching control strategy, capacitors reasonably combined, then output can be acquired. proposed mainly following advantages. Firstly, it expanded further increase levels. Secondly, structure basic circuit in simple, which reduce devices when same. Thirdly, terminal H-bridge for polarity conversion eliminated topology, beneficial total standing peak inverse voltage. an opportunity application medium provided. Additionally, inherent self-balancing capability eliminate additional balancing algorithms, therefore, modulation strategy simplified. Finally, correctness effectiveness verified by extensive simulation experimental results carried out on 13-level