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Optimal Design Strategy and Electro-Thermal Modelling of a High-Power Off-Board Charger for Electric Vehicle Applications

机译:电动汽车大功率车载充电器的优化设计策略和电热建模

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This paper proposes an optimal design procedure of high-power off-board charger (Off-BC) systems for electric vehicle EV applications. The main purpose is to design a high-power DC charging system with low current ripples for achieving maximum efficiency. This paper presents linear and non-linear modelling of a 175kW three-phase AC/DC converter for EV applications. This paper also presents manufacturer’s datasheet driven accurate electro-thermal modelling. The design methodology is categorized into analytical modelling of three-phase active rectifier, optimal design strategy of passive filters, and control design of DC bus voltage. Finally, closed-loop dynamic electro-thermal behavior of Off-BC is simulated using MATLAB Simulink®. The proposed Off-BC operates with a current Total Harmonic Distortion (THD) below 3% and Power Factor (PF) above 99%, while the highest efficiency achieved is approximately 99% at rated power condition.
机译:本文提出了用于电动汽车EV应用的大功率车载充电器(Off-BC)系统的最佳设计程序。主要目的是设计一种具有低电流纹波的大功率直流充电系统,以实现最高效率。本文介绍了用于EV应用的175kW三相AC / DC转换器的线性和非线性建模。本文还介绍了制造商的数据表驱动的精确电热模型。该设计方法分类为三相有源整流器的分析建模,无源滤波器的最佳设计策略以及直流母线电压的控制设计。最后,使用MATLABSimulink®模拟了Off-BC的闭环动态电热行为。建议的Off-BC在当前总谐波失真(THD)低于3%且功率因数(PF)高于99%的情况下运行,而在额定功率条件下实现的最高效率约为99%。

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