Analysis and evaluation of the two-switch three-level boost rectifier

This paper presents the analysis and evaluation of a two-switch boost rectifier operated in the discontinuous conduction mode (DCM). The three-level structure of the topology discussed in the paper allows the use of devices with reduced voltage ratings, such as 600 V MOSFETs. The analysis shows that the harmonic distortion created by the two-switch topology is lower than that of the single-switch three-phase DCM boost rectifier. The interleaving technique is used to reduce the size of the input filter by providing input current ripple cancellation. This paper also compares the two-switch three-level topology against its benchmark, which consists of three single-phase front-end modules implemented with single-phase continuous conduction mode (CCM) boost rectifiers in the power factor correction (PFC) stage. The discussion is supported by simulation and experimental results