A STEP-UP SWITCHED-CAPACITOR MULTILEVEL INVERTER WITH SELF VOLTAGE BALANCING
The objective of this article is to propose a new inverter topology for multilevel voltage output.
This
topology is designed based on switched-capacitor technique and the number of
output levels is determined by the number of switched-capacitor cells.
Only one
dc voltage source is needed and the problem of capacitor voltage balancing is
avoided as well.
This structure is not only very simple and easy to be extended
to higher level, its gate driver circuits are also simplified because the
number of active switches is reduced.
Operational principle of this inverter
and the targeted modulation strategies are presented, and power losses are
investigated as well.
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