Optimal control design method for trans-linked type multi-phase boost converter

In recent years, the boost converter system with compact and light weight performance have been required in the Hybrid Electric Vehicle and Electric Vehicle applications. To obtain the miniaturization performance for the passive circuit component, such as the inductor and the smoothing capacitor, the multi-phase method boost chopper circuit with the coupled inductor have been proposed and discussed. This paper presents the optimal control design technique for the trans-linked type multi-phase boost chopper circuit. To perform the control design, the frequency property of the proposal circuit is analyzed by using state space averaging method. The control system is designed by using the derived frequency property as well. Furthermore, the validity and utility of this method are evaluated and discussed from the experimental point of view.