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杂散磁通传感器核心对电机状态监测的影响

Stray Flux Sensor Core Impact on the Condition Monitoring of Electrical Machines.

作者信息

Tian Pengfei, Platero Carlos A, Gyftakis Konstantinos N, Guerrero Jose Manuel

机构信息

Department of Automatic Control, Electrical and Electronic Engineering and Industrial Informatics, Universidad Politécnica de Madrid, 28040 Madrid, Spain.

School of Engineering, The University of Edinburgh, Edinburgh EH8 9YL, UK.

出版信息

Sensors (Basel). 2020 Jan 29;20(3):749. doi: 10.3390/s20030749.

DOI:10.3390/s20030749
PMID:32013240
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC7038506/
Abstract

The analysis of the stray flux for electrical machine condition monitoring is a very modern and active research topic. Thanks to this technique, it is possible to detect several types of failures, including stator and rotor inter-turn faults, broken rotor bars and mechanical faults, among others. The main advantages are that it involves a non-invasive technique and low-cost monitoring equipment. The standard practice is to use coreless flux sensors, with which the stray flux of the machine is not perturbed and there are no problems due to saturation or nonlinear behavior of the iron. However, the induced voltage in the coreless coil sensor may be very low and even, in some cases, have a similar amplitude to the noise floor. This paper studies the use of iron core stray flux sensors for condition monitoring of electrical machines. The main advantage of iron core flux sensors is that the measured electromotive force is stronger. In the case of large machines in noisy environments, this can be crucial. Two different types of iron core stray flux sensors and a coreless flux sensor are tested. A comparison of the three sensors is presented. Extensive experimental testing with all sensors shows the superiority and greater sensitivity of sensors with core versus the coreless ones.

摘要

用于电机状态监测的杂散磁通分析是一个非常现代且活跃的研究课题。借助这项技术，可以检测多种类型的故障，包括定子和转子的匝间故障、转子断条以及机械故障等。其主要优点在于它涉及一种非侵入性技术以及低成本的监测设备。标准做法是使用无铁芯磁通传感器，使用这种传感器时电机的杂散磁通不会受到干扰，并且不会因铁芯的饱和或非线性行为而产生问题。然而，无铁芯线圈传感器中的感应电压可能非常低，甚至在某些情况下，其幅度与本底噪声相似。本文研究了使用铁芯杂散磁通传感器进行电机状态监测。铁芯磁通传感器的主要优点是测得的电动势更强。对于处于嘈杂环境中的大型电机而言，这可能至关重要。测试了两种不同类型的铁芯杂散磁通传感器和一种无铁芯磁通传感器。给出了三种传感器的比较结果。对所有传感器进行的广泛实验测试表明，有铁芯传感器相对于无铁芯传感器具有优越性和更高的灵敏度。

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