A passivity-based controller for a unity-power-factor rectifier

In this paper, a new control strategy based on the passivity-based control theory of Euler-Lagrange (EL) systems is proposed for a unity-power-factor PWM rectifier. The proposed regulators are based on an energy shaping and damping injection scheme. Since the passivity-based methodology is a nonlinear approach, excellent transient response and global stability can be assured under large perturbations in parameters and loads. Simulation and experimental results show that the proposed controller can make near power factor, low harmonic distortion at input-side and DC voltage constant at output-side.