集磁式OCS磁特性随温度变化的研究

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摘要温漂问题是制约集磁式光学电流传感器实用化的瓶颈之一，目前研究集中在光学器件温度特性分析与补偿方面，缺乏对传感头磁特性随温度变化的分析。实际应用中磁导率和气隙长度随温度变化，使气隙磁场强度改变并影响测量准确度，因此有必要对传感头磁特性随温度变化情况进行分析。本文分析了铁磁材料磁滞回线随温度变化的情况，并在J-A模型的基础上建立带温度系数的磁滞模型；提出热膨胀系数和磁致伸缩系数的近似表达式，修正了热膨胀和磁致伸缩对气隙长度的影响；最后建立集磁环附加温度参数和气隙参数的磁滞模型，分析磁特性随温度变化情况。基于该模型提出一种具有稳定温度特性的传感头设计方法，以铁基非晶合金为例进行了仿真和实验验证，二者结果吻合，证明了模型和设计方法的有效性。

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	李超
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关键词 ：光学电流传感器, 温度, Jiles-Atherton模型, 磁滞回线, 集磁环, 铁磁材料, 气隙

Abstract：Temperature-drift limits the application of optical current sensor(OCS), study is now focused on the analysis of the temperature characteristics of optical devices and there is no enough research on the variation of magnetic properties with temperature. Magnetic permeability and air gap length are changed with temperature, it is necessary to analyze the magnetic properties coupled temperature. The magnetic model including thermal effects and air gap factors are proposed by incorporating the temperature into the original Jiles-Atherton model and adding magnetostriction coefficient and thermal expand coefficient to correct the length of air gap. A new design of air gapped amorphous core with stable temperature characteristics is proposed based on the new model. The experiments on a Fe-based amorphous core are conducted and the results show good agreement between the simulation and the experiment.

Key words： Optical current sensor temperature Jiles-Atherton model hysteresis loop magnetic concentrator ferromagnetic material air gap

收稿日期: 2013-12-10 出版日期: 2015-05-25

PACS:

TM152

基金资助:国家自然科学基金项目（51177016）和国家电网公司科技项目（闽电发展[2012]88）资助项目。

作者简介: 李超男，1983年生，博士研究生，工程师，研究方向为电力电子技术在电力系统中的应用。王夏菁女，1989年生，硕士研究生，研究方向为光学电流传感器相关技术。

引用本文:

李超, 王夏菁, 徐启峰. 集磁式OCS磁特性随温度变化的研究[J]. 电工技术学报, 2015, 30(8): 45-55. Li Chao, Wang Xiajing, Xu Qifeng. Research on the Temperature Dependence of the Magnetic Properties of Optical Current Sensor with Magnetic Concentrator. Transactions of China Electrotechnical Society, 2015, 30(8): 45-55.

链接本文:

http://dgjsxb.ces-transaction.com/CN/Y2015/V30/I8/45

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