Experimental study of border collision bifurcation in buck-boost DC/DC power converters

Based on the previous theoretic analysis, an experimental investigation to the nonlinear phenomenon for Buck-Boost DC/DC converter of peak-current control mode is performed. A corresponding experimental power circuit and the related acquisition system are designed and established, with which the bifurcation diagrams and Poincaré sections describing the nonlinear characteristics of a circuit are obtained. The experimental results are applied to identify and analyze the dynamic behaviors and evolvements of the border collision bifurcation. A comparison with the numerical simulation in the bifurcation shape and point verifies the reasonability and feasibility of the proposed method.