Z source based switched capacitor nine level boost inverter with a modified modulation strategy.

This article presents a Z source (ZS) based switched capacitor multilevel inverter (SC-MLI) with low capacitors charging inrush currents utilizing a modified modulation strategy. The topology generates nine output voltage levels with quadruple voltage gain utilizing eight power switches, five capacitors, two inductors, four discrete diodes, and a single DC source. The voltage gain can be further increased by applying shoot through (ST) states to the frontend ZS-network.

Buck-Boost DC-AC converter based on coupled inductors.

In this paper, a single stage buck-boost DC-AC converter based on coupled inductors is presented for renewable energy and electric vehicle applications. The proposed topology works with only three semiconductor switches, two diodes, and three coupled inductors to transfer input DC voltage to a high gain or low gain output AC voltage. A coupled inductor is used instead of normal inductors, which will reduce core and size requirements.

A single-phase direct buck-boost AC-AC converter with minimum number of components.

In this paper, a single-phase direct pulse width modulation (PWM) buck-boost AC-AC converter is proposed. The proposed converter utilizes a minimum number of semiconductor switches and passive components that decreases the converter power losses and offers high efficiency. It can be operated with simple PWM control and doesn't require soft-commutation strategies.