An Investigation on DC-Link Voltage Influence on E-Drive Efficiency for E-mobility Application

2023 IEEE Workshop on Electrical Machines Design, Control and Diagnosis (WEMDCD) Pub Date : 2023-04-13 DOI:10.1109/WEMDCD55819.2023.10110942

A. Carlsson, V. Josefsson, Fredrik Furufors, S. Nategh, David Ekholm, Noel Kleen

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引用次数: 1

Abstract

This paper presents the experimental investigation of how the E-Drive efficiency is impacted by system voltage. To evaluate the impact on a system level for automotive application, an 800 V E-Drive is evaluated in a test rig. A 385 kW electric motor is used together with an 800 V Silicone-Carbide inverter. Two different tests are conducted, the first bring high accuracy efficiency measurements of the motor and inverter at a number of fixed operation points. The second test is the WLTC cycle in which the total E-Drive efficiency and on a component-level is measured over the total drive cycle. The results are presented and discussed where significant voltage dependency can be noted for the efficiency, both for the motor and inverter. Hence this paper highlights one of the challenges as automotive OEMs move towards higher voltages. Future studies to be conducted are mentioned in the discussion to further investigate how the inverter conditions will influence the total system efficiency and to show possible solutions to reduce the impact of the system voltage level.

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电动汽车直流电压对电动驱动效率影响的研究

本文对系统电压对电驱效率的影响进行了实验研究。为了评估对汽车应用系统级别的影响，在试验台对800 V E-Drive进行了评估。一台385千瓦的电动机与一台800 V的碳化硅逆变器一起使用。进行了两种不同的测试，第一种是在多个固定工作点对电机和逆变器进行高精度的效率测量。第二个测试是WLTC循环，其中总E-Drive效率和组件级别是在整个驱动循环中测量的。结果提出并讨论了显著的电压依赖关系，可以注意到效率，无论是电机和逆变器。因此，本文强调了汽车oem向更高电压移动时面临的挑战之一。在讨论中提到了未来的研究，以进一步研究逆变器条件如何影响系统总效率，并展示可能的解决方案，以减少系统电压水平的影响。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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2023 IEEE Workshop on Electrical Machines Design, Control and Diagnosis (WEMDCD)

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