An Improved Bidirectional Dual-Output Multilevel Buck PFC Rectifier With Wide Load Scalability and Stability

Power converters with multiobjective functionality have ample scope of research in the power electronics field. As a consequence, a bidirectional multilevel buck rectifier (BMBR) is proposed for power factor correction applications. Unlike the existing bidirectional multilevel rectifiers, the proposed BMBR has excellent load scalability and stability. In addition, the proposed BMBR synthesizes multilevel voltage across its input terminals to shape the supply current and reduce its harmonic content. Further, the proposed BMBR eliminates the need for an additional output voltage sensor. Also, its continuous current mode operation reduces the requirement for capacitive and inductive filter at its input and output sides, respectively. All the power switches in the proposed BMBR operate at a lower switching frequency and have equal peak inverse voltage. In addition, the BMBR is capable of feeding single as well as double similar/dissimilar loads simultaneously without compromising converter stability. Through experimental findings, the superiority of proposed BMBR has been confirmed under steady-state and dynamic operations.