Study on the Passivity-Based Control Method of the Four-switch Buck-Boost Converter

The operation principle of the four switch Buck-Boost converter was analyzed. Based on the EL Model of the four switch Buck-Boost converter and the theory of passivity-based control, an innovative passive control method for four-switch Buck-Boost converter is proposed. Designed and optimized the optimal damping injection DI, this new passivity-based control method ensure that the input current and output voltage of the four switch Buck-Boost converter can reach their equilibrium value rapidly. The simulation results prove that the passivity-based controller can ensure the passivity and stability of the four switch Buck-Boost converter, the converter has the good steady-state and dynamic performance.