Novel voltage self-balancing switched capacitor multilevel inverter
In order to achieve more output levels with fewer devices,and to solve the problem that the voltage stress of traditional multi-level inverter switching devices is large and easy to be damaged when working at high voltage,a new single-power switched capacitor multilevel inverter topology was proposed.The switching capacitor inverter topology was modulated by logic combination by studying the combination of switching capacitor technology and cascaded H-bridge inverter,and the high-efficiency voltage gain and level output were realized by using pulse width modulation through logic combination.On the premise of ensuring the self-equalization of the capacitor voltage,only a single DC power input was used to pro-duce a seven-level output with three times the voltage gain.Then,in order to further expand the applica-tion range of the inverter,the expansion structure of the proposed inverter was introduced,and its work-ing mode was briefly analyzed.At the same time,it is compared with other similar topologies to prove the advantages of this topology.Finally,in order to verify correctness of the theoretical analysis,simulation and experimental prototypes were designed,and the performance of the inverter was tested in detail.
switched-capacitorsingle-inputbasic unitvoltage stresscapacitors voltage self-balancing
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