Design of Flyback Converter Based on Synergetic Control

The general flyback converter is difficult to meet the overall stability of the converter when its input voltage and load have varied widely. The control strategy of the flyback converter based on synergetic control is proposed in this chapter, and it can be robust to both external disturbance and parametric variation. The results show that the synergetic control has constant switching frequency and better suitable for digital implementation; the manifolds can be reached from any original states according to exponential term; and the invariance against external perturbation and system parameter variation can be obtained when the matching conditions are satisfied. The simulation results of Matlab/Simulink show that the converter is not only asymptotically stabilized at the objective working point, but also has better robustness against the sudden change of input voltage and load.