Switching Cell Current Source Inverter With Active Power Decoupling Circuit

This article proposes a single-phase current source inverter (CSI) that uses active power decoupling (APD) technique. The proposed CSI attenuates an undesirable low-frequency ripple power transferred from ac side and has a dc-link inductor with small inductance. In addition, it implements the switching cell structure to minimize overlap-time and eliminate arm-open problem, thus improving quality of output waveforms. It is easy to implement control scheme because the APD circuit is controlled independently of the output side. Detailed analysis and experimental results are provided to verify performance of the proposed CSI.