Power Factor Corrector with a Fast Regulation and Constant Switching Frequency

This paper presents a modelling of power factor correction and digital implementation of different loops of circuit such as the PI controller for voltage loop and the hysteresis controllers for current loop. Three hysteresis control techniques: fixed band, sinusoidal band and variable band are applied and have been verified by simulation. For the experimental part, all cited controllers are applied and performance tests were used to validate the results obtained through simulations using a test bench based on dSPACE DS1104. Results show that the PI controller gives a better steady-state performance under large load disturbance and variation of reference values, whereas the variable band hysteresis control in the current loop gives a low THD of the input current compared to other hysteresis controls.