Single phase PFC control with Lyapunov method

In this paper a current control method based on Lyapunov function for single phase active power factor correction (PFC) is presented. Lyapunov functions can be used for defining control law for either linear or nonlinear systems. The control is designed with cascade structure, where a voltage controller feeds the current amplitude reference to the current controller. The operation and performance are demonstrated with measurements from 3 kW power supply which uses power factor correction. The designed controller is shown to track the mains voltage with close to unity power factor.