The Implementation of Synergetic Control for a DC-DC Buck-Boost Converter
Ke Wang, Duyu Liu, Long Wang
Abstract
In order to solve the nonlinear control problem of DC-DC Buck-Boost converter in switching power supply, the synergetic control method is adopted and applied to DC-DC Buck-Boost converters. Firstly, according to the characteristics of DC-DC Buck-Boost converter, we choose an improved macro-variable during the design of synergetic controller, which reduces the dynamic response time of the system. The synergetic control law of the system is also derived. Then, considering of the system robustness to the input voltage changes, we add a compensation amount to the control law, which can improve the control precision and make the system a good inhibitory effect to parameter change. Finally, the simulation results show the effectiveness of the proposed method.