Power Analysis of Flying Capacitor Converter Utilizing Singular Auxiliary Chopper

This paper presents the power and ripple current analyses of a bidirectional non-isolated dc-dc converter based on a flying capacitor converter topology (FCC) with a singular chopper circuit. The converter consists of a main converter made of two power devices and an auxiliary converter that is made up of a singular chopper connected to the main converter through an inductor. The proposed configuration aims to solve the problems of the previous iteration of the same topology utilizing multiple chopper cells as it suffered from high cost and high power losses in the system because it uses many power devices. However, this proposed conflagration allows for triangular waveform to be observed on the inductor’s current, a simpler control scheme, and a minimum number of power devices. The validity of the theoretical analysis, operating principles, and control method of the circuit is presented and verified using an experimental downscaled system.