Abstract:

By introducing the control aim into the system state equations, a nonlinear affine model of Boost converter working in current conduction mode （CCM） is set up, which is theoretically proved to satisfy the controllability condition and the involution condition for the exact linearization control of state feedback. Then, a nonlinear output function and the corresponding nonlinear state feedback control law are derived and used to implement the exact linea- rization control of state feedback of the original system. Moreover, the selection of the feedback coefficient is ana- lyzed in detail. The proposed control method dispenses with any additive voltage PI controller. Thus, it is easy to implement and is more robust to the input voltage, the load and the component parameters. Simulated results indi- cate that the proposed method is of high performance and is superior to the passivity-based control methods.

Key words: power electronics, Boost converter, state feedback, state-space average modelling, nonlinearity, exact linearization