Study of a novel soft-switched Vienna rectifier using simple active technique

In recent years, efficient power transfer is getting increasing attention in high-power conversion systems such as fast battery charger systems primarily necessitate an energy efficient, compact, and reliable power electronic converter scheme. This has stirred vigorous research in high-power converter-based power electronic systems which are feasible in actual practice and perform efficiently. In view of this fact, a novel soft-switched T-type boost rectifier Vienna topology is proposed, which can be considered as a potential candidate in high-power conversion systems. The proposed converter scheme operates at high-switching frequency with soft-switching conditions by employing a simple active snubber circuit, which results in high-efficiency and high-power density with low cost. The low components count, simple power and control circuitry, comparable stresses, and performance are the distinctive features of the proposed converter scheme. Furthermore, the proposed topology achieves high-switching operation while reducing reverse recovery rectifier diode losses and semiconductor losses. The proposed converter scheme's construction, operating principle, and practical implementation are carried out using a low-scale laboratory prototype. In order to evaluate, a comparison with existing soft-switched rectifier topologies is performed in terms of components count. In addition, a MATLAB/Simulink designed subsystem is used to assess the semiconductor devices switching power losses in comparison to its hard-switched counterpart.