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چكيده انگليسي :

Single Stage Power Factor Correction Converter for Battery Charger Zeinab Kardooni Zeinab Kardooni@gmail com Date of submission 2014 09 20 Department of Electrical and Computer Engineering Isfahan University of Technology Isfahan 84156 83111 Iran Degree M Sc Language FarsiSupervisor Prof Hosein Farzanehfard hfarzanehfard@cc iut ac irAbstract In order to reduce fuel usage and greenhouse emissions there is growing interest inelectric vehicle technologies Battery chargers play a critical role in the evolution of thistechnology The charging time and lifetime of the battery have strong dependency on thecharacteristics of the battery charger The conventional battery charger consists of an AC DCrectifier to generate a DC voltage from the AC line followed by a DC DC converter to generatethe required DC voltage level for the battery pack Traditionally the input section of an AC DCconverter consists of a full wave rectifier followed by a large capacitor The current drawn fromthe AC line in such a case is not sinusoidal and consists of pluses of relatively short durationand large peak value Such a current is undesirable because it has a high rms value which leadsto high losses Also such a current is rich in harmonics which may interfere with other loadsconnected to the AC line So the battery charger should have power factor correction stage tomake the input current sinusoidal Single stage type battery charger combines the power factorcorrection stage and DC DC conversion stage into one This charger has fewer components thatreduce volume and weight of charger So it is more efficient and suitable for electric vehicles In this thesis at first section battery charger classifications is reviewed and differentcharging systems are discussed for electric vehicles application Also different chargingmethods are reviewed and their advantages and disadvantages are investigated In addition single stage power factor correction circuits are investigated and different topologies arediscussed In second section a single stage power factor correction converter is proposed foron board battery charger of electric vehicle This topology is derived from the basic phaseshifted full bridge converter but incorporates an additional transformer winding an inductor and a few diodes This converter is designed to operate in discontinuous mode to minimize dccapacitor voltage variation for wide load range Zero voltage switching for MOSFETs for theleading leg switches and zero current switching for IGBTs in lagging leg switches is realizedfor wide load range Also output diodes turn off under zero current switching so clampedcircuits are not needed The proposed circuit inherently forces the input current to bediscontinuous and ac modulated to achieve high input power factor This circuit uses constantcurrent and constant voltage charge method Analysis of the converter is presented andpresented Finally simulation results are presented and the experimental results on a 300 W aregiven which confirm high efficiency and high power factor features of the proposed topology Key WordsBattery charger Electric vehicle Single stage converter Power factor correction Constantcurrent and constant voltage Phase shifted full bridge Soft switching

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مبدل اصلاح ضريب توان تك مرحله اي تمام پل براي كاربرد باتري شارژ

شارژ باتري , خودرو برقي , مبدل تك مرحله , جريان ثابت ولتاژ ثابت , مبدل شيفت فاز تمام پل , سوئيچينگ نرم