A New Switching Configuration for a Bipolar Full-Bridge Boost Converter: Dynamic Analysis and Model Validation

This paper proposes a new single-stage bipolar Boost DC/DC converter topology, hereafter referred to as the Full-bridge Boost converter. The proposed architecture enables the generation of a bipolar output voltage with a magnitude equal to or greater than the input voltage, reducing the passive component count. Specifically, a single inductor and a single capacitor are employed, in conjunction with a full-bridge structure and auxiliary switches, to achieve both voltage boosting and polarity inversion within a unified conversion stage. A comprehensive switching configuration is presented, and a mathematical model based on the system switching dynamics is derived. Furthermore, the steady-state behavior is analyzed, yielding an explicit expression for the voltage gain as a function of the control input. In addition, ripple analysis and continuous conduction mode (CCM) boundary conditions are derived to establish design constraints for the converter operation. The characteristic waveforms under both CCM and discontinuous conduction mode (DCM) operation are also analyzed. The validity of the proposed topology and its mathematical representation is verified through MATLAB/Simulink simulations. The detailed switching-level converter is implemented using the Simscape Electrical environment, and the numerical results of the averaged model are compared against the circuit-level simulation through waveform analysis and root mean square error (RMSE) indices to assess modeling accuracy. Finally, implementation feasibility considerations, including semiconductor stress, dead-time requirements, conduction and switching losses, and efficiency analysis, are discussed.