arXivDaily arXiv每日学术速递 周一至周五更新
北美退伍军人节(Veterans Day),12 日无更新
arXiv 2006.04705eess.SYcs.SY
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基于解析建模与优化的电动汽车传动比设计

Transmission Ratio Design for Electric Vehicles via Analytical Modeling and Optimization

Theo Hofman, Mauro Salazar

摘要:

在本文中,我们提出了一个有效的分析建模方法的设计,电动汽车的变速器。具体来说,我们首先设计了一个分析损失模型的电机,并表明,它可以准确地拟合从原始电机地图只采样三个点。其次,我们利用这个模型来获得最佳传动比作为车轮的速度和扭矩的函数,并使用它来优化传动比。最后,我们展示了我们的分析方法与现实世界的案例研究比较两种不同的传输技术的宝马i3:固定齿轮变速器(FGT)和无级变速器(CVT)。我们的研究结果表明,即使是为FGT专门设计的电机,CVT的实施也可以显着提高其运行效率超过3%。所提供的模型将最终弥合理解如何以集成方式有效地指定电机和传动技术的差距,并能够有效地比较基于单速和多速的电动动力系统。

英文摘要:

In this paper we present an effective analytical modeling approach for the design of the transmission of electric vehicles. Specifically, we first devise an analytical loss model for an electric machine and show that it can be accurately fitted by only sampling three points from the original motor map. Second, we leverage this model to derive the optimal transmission ratio as a function of the wheels' speed and torque, and use it to optimize the transmission ratio. Finally, we showcase our analytical approach with a real-world case-study comparing two different transmission technologies on a BMW i3: a fixed-gear transmission (FGT) and a continuously variable transmission (CVT). Our results show that even for e-machines intentionally designed for a FGT, the implementation of a CVT can significantly improve their operational efficiency by more than 3%. The provided model will ultimately bridge the gap in understanding how to efficiently specify the e-machine and the transmission technology in an integrated fashion, and enable to effectively compare single- and multi-speed-based electric powertrains.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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