Signal-Bandwidth Evaluation for Power Measurements in Electric Automotive Drives
Signal-Bandwidth Evaluation for Power Measurements in Electric Automotive Drives
复制标题
电动汽车驱动器功率测量的信号带宽评估
DOI：
10.1109/tim.2015.2419052
复制
发表时间：
2015
影响因子：
5.6
通讯作者：
G. Brasseur
中科院分区：
文献类型：
--
作者：
D. Lindenthaler;G. Brasseur
确定电动汽车中电动机或逆变器的效率需要在逆变器的交流侧进行功率测量。电压和电流信号产生于逆变器的开关操作，因此几乎没有带宽限制。测量设备的有限带宽，如传感器或adc，导致被测信号的带宽限制。这一限制改变了测量信号，并对计算功率产生影响。测量不确定度需要评估带宽限制与功率测量中产生的误差之间的关系。这种关系允许评估频谱分量对功率计算的重要性，并决定哪些分量是相关的，不能被带宽限制过滤掉。本文提出了一种在数值研究中确定带宽限制误差和识别临界量的评估方法。
The determination of the efficiency of an electric motor or an inverter in an electric vehicle requires power measurements on the ac side of the inverter. Voltage and current signals arise there from the switching operation of the inverter and are therefore hardly bandlimited. The finite bandwidth of measurement devices, like sensors or ADCs, yields to a bandwidth limitation of the measured signals. This limitation modifies the measured signals and has an effect on the calculated power. Measurement uncertainty considerations require the evaluation of the relation between this bandwidth limitation and the resulting error in the power measurement. This relation allows then for evaluating the significance of the spectral components for the power calculation and the decision which components are relevant and must not be filtered out by a bandwidth limitation. This paper presents an evaluation method for determining the bandwidth limitation error and identifies critical quantities in a numerical study.