Ferdowsi Rectifiers—Single-Phase Buck-Boost Bridgeless PFC Rectifiers With Low Semiconductor Count

摘要

Two new power factor correction (PFC) rectifiers with the voltage buck-boost capability are proposed in this article, called as Ferdowsi rectifiers (FRs). The proposed rectifiers employ a reduced number of semiconductors compared to the competitors. Also, since the reverse recovery problem of antiparallel diodes of transistor switches is avoided, then MOSFETs can be readily utilized, which lets much higher switching frequencies and lower size of passive components. In addition, two parallel capacitors provide a path for the input current during the discharge mode of the buck-boost inductors to improve the current quality. The discontinuous conduction mode operation of the proposed rectifiers guarantees a high quality input current with a low total harmonic distortion. All aforementioned features offer a highly efficient operation and at the same time a purely sinusoidal current drawn from the ac source compared to the previous well-developed competitors. The validation of the theoretical achievements is performed by extensive tests on a laboratory test rig.