Seite - 41 - in Emerging Technologies for Electric and Hybrid Vehicles

Energies 2017,10, 1217 Table23.ComparisonofcomponentsusedinPSFB,LLCandSRCconverter.Adaptedfrom[98]. Item PSFB LLC SRC Numberofswitchblocks 4 4 4 Numberofdiodeblocks 4 4 4 Numberof transformers 1 1 2 Numberof inductors 1 0 0 Additionalcapacitor Blockingcapacitor - - Outputfilter size Small - Large In [34], Yong et al., presented the front endAC-DC converters. The Interleaved Boost PFC Converter (Figure45)hasacoupleofboostconvertersconnected inparallelandworking in180◦out ofphase [104–106]. The ripple currentsof the inductors cancel eachother. This configurationalso providestwicetheeffectiveswitchingfrequencyandprovidesa lowerripple in inputcurrent, resulting ina relatively small EMIfilter [103,107]. InBridgeless/DualBoostPFCConverter (Figure 46), the gatingsignalsaremade identicalherebytyingthepower-trainswitches. TheMOSFETgatesarenot madedecoupled. Rectifier inputbridge isnotneededhere. TheBridgeless InterleavedBoostPFC Converter (Figure47) isproposedtooperateabovethe3.5kWlevel. Ithas twoMOSFETSanduses twofastdiodes; thegatingsignalshaveaphasedifferenceof180◦. Figure45. InterleavedBoostPFCConverter [46]. Figure46.Bridgeless/DualBoostPFCConverter.Adaptedfrom[46]. 41