Variable DC-link voltage powertrain for electrified mobile work machines

2015 International Conference on Electrical Systems for Aircraft, Railway, Ship Propulsion and Road Vehicles (ESARS) Pub Date : 2015-05-07 DOI:10.1109/ESARS.2015.7101525

Christian Pohlandt, M. Geimer

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引用次数: 8

Abstract

Electric powertrains in mobile work machines are able to increase the efficiency and the effectiveness of the work process. Conventional powertrains are operated at their limits and thus efficient electric systems are entering the applications of mobile work machines. A simple electric powertrain consists of an energy source attached to an inverter-fed electric machine. Adding a DC/DC converter to this powertrain enables an adjustment of the DC-link voltage to the operating point of the machine and increases the efficiency of the work machine. This paper addresses the dependencies of the DC-link voltage regarding to the powertrain losses. An electric powertrain is simulated and verified using measured test bench data. Especially the losses of the electric machine are examined and the correlation to the DC-link voltage is analyzed. The focus is on identifying relevant load cycles of mobile work machines and operating points to gain an efficiency benefit by adjusting the DC-link voltage.

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用于电气化移动工作机器的可变直流电压动力系统

移动工作机器中的电动动力系统能够提高工作过程的效率和有效性。传统的动力系统在其极限下运行，因此高效的电力系统正在进入移动工作机器的应用。一个简单的电力传动系统由一个连接在逆变器供电的电机上的能源组成。在此动力系统中添加DC/DC转换器，可以将DC链路电压调整到机器的工作点，并提高工作机器的效率。本文讨论了直流链路电压对动力系统损耗的依赖关系。利用实测台架数据对电动传动系统进行了仿真和验证。重点研究了电机的损耗，并分析了损耗与直流电压的关系。重点是确定移动工作机器和操作点的相关负载周期，通过调整直流链路电压来获得效率效益。

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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2015 International Conference on Electrical Systems for Aircraft, Railway, Ship Propulsion and Road Vehicles (ESARS)

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