High-Reliability Single-Phase Six-Switch Dual-Output Current Source Inverter with Switching-Cell

 Abstract—

This paper proposes a novel single-phase six-switch dual-output current source inverter. The switching-cell structure is implemented into two of three phase legs of the proposed inverter to improve the reliability due to the absence of open-circuit problems. In addition, the overlap-time between switching transition can be minimized or eliminated to enhance output performance, efficiency, and dc-source utilization. Both the number of semiconductor devices and conduction loss of the proposed inverter are reduced in comparison with the conventional dual-output current source inverters. The proposed topology can be applied in dual-output inverters, universal power filter, and uninterruptible power supply, for instance. A 300 W prototype with 35 V dc input was built and tested to verify the performance of the proposed inverter.