Abstract:For the Buck DC-DC converter, a model predictive control method is proposed to drive the output voltage to the setpoint value with more rapid convergence speed. By using the linear matrix inequality (LMI) technique and the invariant set, the control problem of the Buck converter is transformed into a semidefinite programming problem. Motivated by the idea of rolling horizon control of model predictive control, the infinite horizon performance of the Buck converter is optimized by the available online computation. The proposed predictive controller can achieve faster convergence speed and better control performance compared with the past literature under three different sampling periods. The simulation results show the effectiveness of the control method.