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Study on Output Voltage Ripple Coefficient of DC Charger Based on Orthogonal Test

Research paper by Zuoqin Zeng, Jinshan Chen, Lixin Zheng, Yunming Wei Youchang Chen

Indexed on: 16 Dec '18Published on: 13 Dec '18Published in: IOP Conference Series: Materials Science and Engineering



Abstract

DC chargers output high voltage, large current during their charging process, which inevitably produce and carry a lot of ripple. The ripple will not only damage performance of electric vehicle battery, but also cause current distortion at AC side. Therefore, studies on output voltage ripple coefficient of DC charger are important. In this paper, we consider the condition that the structure of DC charger is fully established, and take AC input voltage, DC output voltage and DC output current as the three main parameters. Then orthogonal test method and matrix analysis method are introduced successively, through orthogonal test table, range analysis and matrix calculations, the optimal combination status when DC chargers produce the minimum ripple coefficient is studied. Results show that when AC input voltage, DC output voltage reach up to maximum and DC output current reach up to median, output voltage ripple coefficient of RMS and peak-peak value of DC charger reach to the min...