Study on Pure Sinusoidal Output Generation Techniques for Single-Phase Current-Source Inverter

This paper describes several techniques to create new pure sinusoidal output generation for the current-source inverter (CSI) by incorporating state-of-the-art single-phase multilevel CSIs with linear power amplifiers. The successful key of this hybridization is the superimposition procedure, where the staircase multilevel current is superimposed by the linear compensating current to produce a pure sinusoidal current. The procedure is implemented in DC and AC compensation techniques. By using these strategies, nine new hybrid multilevel CSIs are obtained. One of the new hybrid configurations with DC compensation is tested in the experimental validation to demonstrate the proper operations of the proposed techniques.