Switched Control Applied to a Totem-Pole Bridgeless Rectifier for Power Factor Correction

Abstract: The wide range of operation of bridgeless rectifiers requires a control technique that guarantee robustness. Linear Power Factor Correction (PFC) control techniques, although effective, cannot guarantee such robustness. Nonlinear techniques such as one cycle control are more robust, but other options should be explored. In this work, an affine model is obtained for a Totem-Pole Bridgeless Rectifier (TPBR). An extension to an existing switched control design technique is presented in order to achieve PFC in a robust fashion for the TPBR. Simulations with nonideal components and distorted grid voltage show a precise, fast and robust performance of the switched controller. The effective reference following of the proposed method allows the user to define a current reference waveform that prioritize THD or power factor, depending on the application and norm requirements.