A Pulse-Width Modulation Based Nonlinear Control for DC-DC Buck Converters with Perturbed Input Source and Load Current

摘要

In this paper, we address the control problem of the DC-DC buck converter with perturbed input source and load current. A new nonlinear control method is proposed which can ensure to generate a bounded control signal corresponding to the Pulse-Width Modulation (PWM) duty ratio in the range of [0, 1]. The overall system stability is rigorously analyzed using the Lyapunov second method. PSPICE based Monte carlo simulation is conducted to further validate the effectiveness of the proposed new design in the presence disturbances as well as system parametric uncertainties.