Interleaved Triangular Current Mode (TCM) Resonant. Transition, Single Phase PFC Rectifier with High Efficiency and High Power Density

摘要

This paper presents a new topology for a highlycompact and highly efficient single-phase Power Factor Corrected(PFC) rectifier system. The new topology consists of several in-terleaved boost stages which operate in a mode called TriangularCurrent Mode (TCM) in order to simultaneously achieve a highpower density as well as a high efficiency. Applying TCM, ZVSis achieved over the full mains period by proper control of thepower MOSFETs. The high TCM inductor current ripple isnot transferred to' the mains as the superposition of all boostcell input currents results in a smooth mains current waveform.Furthermore, one bridge leg operates synchronously to the mainsfrequency and connects the mains directly to an output rail. Thisresults in very low common mode noise and only a small commonmode filter has to be considered. The excellent behavior of thistopology also applies to inverter operation.