A New Quadratic Buck-Boost Converter

Starting from a well-known quadratic converter the basic analyzes show that this converter has a limited duty cycle of lower 0.5. To use the converter for higher duty cycles some changes in the topology have to be done. Three improved converters are shown. The converter is modelled with the help of the state space averaging method and simulated with the help of LTSpice by solving the state equations and by circuit simulation to prove the function and the mathematical model.