Switching Rule Based on Min-projection Strategy of DC-DC Converters

Stability study and control design of DC-DC converters are handled easily and efficiently by utilizing piecewise linear systems analysis approach. So this paper models DC-DC converters as switched linear systems, introduces projection strategy conception of switched linear systems, and proposes control strategy of switching rule based on min-projection strategy. Design approach and procedure for the proposed switching rule of DC-DC converters which realizes passive control and global stability are presented. And according to the feature that the proposed switching rule depends on the equilibrium point, the desired equilibrium point is compensated for advancing robust and convergent rate of the proposed switching rules. In addition, a clock delay control is designed to overcome the problem of sliding motion in the min-projection strategy based switching rule. The simulation and experiment results demonstrate that the proposed min-projection strategy based switching rule is generally applicable to the practical DC-DC converters.