A simplified model for minor and major loop magnetic hysteresis and its application for inference of temperature in induction heated particle beds
A simplified model for minor and major loop magnetic hysteresis and its application for inference of temperature in induction heated particle beds
复制标题
小环和主环磁滞的简化模型及其在感应加热颗粒床温度推断中的应用
DOI：
10.1088/1361-6463/acf13f
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发表时间：
2023
期刊：
影响因子：
--
通讯作者：
Noble J
中科院分区：
文献类型：
--
作者：
Noble J
在这项工作中，一个LangArc模型，成功地适合在真实的时间使用仪器，检测磁场强度的变化，如在原位拾波线圈的磁性颗粒床的主要和次要磁滞回线。一种新的温度测量应用程序演示的基础上的实时表征的磁性材料，在这种情况下磁铁矿，作为温度的函数。磁滞可用于在磁性材料的填充床中提供有用的感应加热。这可用于一般加热，并为化学过程中的化学反应提供能量。感应加热下磁性颗粒的精确温度测量是一个众所周知的挑战：传统技术只能进行单点测量，并且由于仪器尖端的自加热而导致不准确。由于感应加热的特点是加热速度快，热滞后可能是个问题。LangArc推断的温度测量技术被证明可以检测超过30 C· s− 1的加热速率，在这种情况下，床内热电偶被证明滞后多达180 C。这种新方法对于涉及磁性材料感应加热的应用中的温度测量具有重要意义，因为它避免了将仪器放置在磁性颗粒床内，并且在快速加热下具有高度响应性，而其他技术可能会产生误导性结果。
In this work, a LangArc model is presented that successfully fits both major and minor hysteresis loops of a bed of magnetic particles in real time using instruments that detect changes in the magnetic field strength, such as in-situ pick-up coils. A novel temperature measurement application is demonstrated based on a real-time characterisation of a magnetic material, in this case magnetite, as a function of temperature. Magnetic hysteresis can be used to provide useful induction heating in a packed bed of magnetic materials. This can be used for general heating and to provide energy to chemical reactions in chemical processes. Accurate temperature measurement of magnetic particles under induction heating is a well-known challenge: conventional techniques give a single-point measurement, and are subject to inaccuracy due to self-heating of the instrument tip. Thermal lag can be problematic given the rapid heating rates that are characteristic of induction heating. The LangArc inferred temperature measurement technique is shown to detect heating rates in excess of 30 C· s− 1, under which circumstances an in-bed thermocouple was shown to lag by as much as 180 C. This new method has significant importance for temperature measurement in applications involving the induction heating of magnetic materials as it avoids the location of an instrument inside the magnetic particle bed and is highly responsive under rapid heating where other techniques can give misleading results.