Reducing the electromagnetic interference for single-stage single-switch AC/DC power factor correction by ripple-steering technique

The improved electromagnetic interference (EMI) for single-stage single-switch AC/DC Power Factor Correction (S⁴PFC) by ripple-steering technique is presented. The suitable coupled inductor design, which used for steering the ripple that applied for single-stage single-switch AC/DC power factor correction, is fulfilled to gain a significantly conducted EMI reduction. The performance of modified boost inductor is shown by the implemented and discussed. Finally, the comparison between "modified boost inductor" and conventional "LC" filter in the EMI point of view is verified and experimented.