A modified boost topology to minimize distortion in PFC rectifier

The cusp distortion is an inherent behavior of all boost PFC rectifiers. Though the contribution of cusp distortion is small but it limits the maximum achievable performance in PFC rectifier. In spite of this fact, little effort has been made in the past to avoid cusp distortion. We will propose a new topology to minimize the distortion in boost rectifier. The main characteristic of the proposed topology besides improving the distortion in the boost rectifier is that it provides ZCS/ZVS switching of all components except for one hard switching during turn on transient. Furthermore it needs simple output feedback control and requires fewer components; hence it is also economically feasible. For further verification, a prototype system was also built and tested.