A Front-End Bridgeless Power Factor Corrector For Electric Vehicle Battery Chargers
DOI:
https://doi.org/10.18618/REP.2017.4.2707Keywords:
AC-DC converter, Battery Chargers, Bridgeless Boost Converter, Electric Vehicle, Power Factor Corrector (PFC)Abstract
In this paper, a bridgeless power factor corrector converter is suggested for electric vehicle battery chargers. The converter is applicable as a front-end stage for residential charging, i.e. automotive level 1. It is presented a steady state operation analysis for the proposed converter. It operates in current continuous conduction mode controlled by a voltage outer loop and a current inner loop control strategy. Experimental results were performed for a 1 kW prototype, considering 220 V grid voltage, 400 V dc output voltage, 70 kHz switching frequency, and the control system implemented by the UCC28070. The experimental results are satisfactory, which demonstrate a peak efficiency of 98.4% at half load, and features high efficiency from light load to full load. Additionally, the input current THD is less than 5% from half to full load and the power factor is higher than 0.99 from half to full load.
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