A Zero-Voltage Switching Control for Four-Switch Buck-Boost Converters Using the Energy-Based Modeling

This letter proposes a zero-voltage switching control strategy for four switch buck–boost converters where the output voltage and the base current are closed-loop regulated. The analytical steady-state expressions allow the control variables’ regulation by only knowing the electrical parameters of the circuit and the zero-voltage switching current. The control uses two proportional–integrative controllers and a predictive function without the need for complex rms current minimization techniques or logic. The control scheme is implemented and demonstrated using an experimental setup.