Sze Sing Lee, Yeongsu Bak, Seok-Min Kim, Anto Joseph, and Kyo-Beum Lee, "New Family of Boost Switched-Capacitor Seven-Level Inverters (BSC7LI)," IEEE Transactions on Power Electronics, vol. 34, no. 11, pp. 10471–10479, Nov. 2019. -SCI > Paper

This paper proposes a new family of multilevel inverter topology that is able to generate seven voltage levels by utilizing one or two

floating capacitors and ten power switches. This novel boost switched-capacitor 7-level inverter (BSC7LI) possesses voltage

boosting capability with an achievable maximum voltage level 1.5 times the input direct current (dc) voltage. The generation of

higher output voltage does not incur high-voltage stress on any power switch in this topology, as the peak inverse voltages of all

power switches do not exceed the input source voltage. In addition, capacitor voltage balancing is not essential since the floating

capacitors are effectively balanced during the charging and discharging processes. Furthermore, the proposed topology eliminates

the need for multiple isolated dc sources, and a single dc source is sufficient in both its single-phase and three-phase topologies.

The operating principle and steady-state analysis of the proposed topology are elaborated. Experimental results from a single-phase

prototype are then presented to verify the validity of the proposed topology.