Chaos control for the Buck-Boost converter under current-mode control

Based on chaotic phenomena of the Buck-Boost converter under current-mode control, according to the reference current I_ref which works as a bifurcation parameter, the poincare section diagram, the switch logic diagram and the bifurcation map are studied by applying the discrete map; moreover,by employing a nonlinear feedback controller which is a piecewise-quadratic function in the form of x|x| in the chaotic Buck-Boost converter, chaos control of the Buck-Boost converter is achieved. The numerical simulation shows that this method is suitable for the stability control of diversified periodic orbits by adjusting the feedback gain in the nonlinear feedback controller.