State-of-the-art power factor correction in EV charger

Abstract

With the vigorous development of the automobile industry, the exploitation of oil resources has gradually deepened, which has led to the gradual depletion of oil resources. In this situation, electricity has come to replace oil resources in the automobile industry. However, in the charging process of electric vehicles, the use of the efficiency of electric energy is particularly important. If the efficiency is low, then a lot of power is lost in the power transmission line or alternating magnetic field conversion. And an important factor affecting efficiency is the power factor. The traditional AC-DC converter with a full bridge has low power utilization and efficiency, existing studies combine full-wave bridge with other circuits with different functions to form power factor correction (PFC) topologies. And these fundamental topologies continue to develop, derived from the bridgeless, interleaved PFC topologies, etc. This paper reviews the fundamental full-wave bridge PFC topologies and some derived bridgeless PFC topologies and interleaved parallel PFC topologies, including showing their circuit diagrams, explaining the operation principle of these circuits and comparing the advantages and disadvantages of each PFC topology.