基于超磁致伸缩材料的电流互感器涡流损耗模型与分析
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摘要
基于超磁致伸缩材料的新型电流互感器可以满足智能电网对于高精度、稳定性检测的需要,但超磁致伸缩材料所产生的涡流损耗会影响传感单元的精度和寿命。对基于超磁致伸缩材料的新型电流互感器的涡流损耗计算方法及影响因素进行了研究。首先设计了基于超磁致伸缩材料的电流互感器传感单元的结构,并基于麦克斯韦方程组对整体结构的超磁致伸缩棒进行磁场建模,运用贝塞尔函数对方程组进行求解并得到含有多种变量的内部磁场分布函数,进而利用电磁场知识对涡流损耗进行计算,分析了工作频率以及超磁致伸缩棒半径等因素对涡流损耗的影响,为涡流损耗的补偿提供基础。
The new current transformer based on giant magnetostrictive material can meet the needs of smart grid for high accuracy and stability testing. But the eddy current loss caused by giant magnetostrictive material will be in the form of heat loss performance, influencing the working precision and service life of the sensor. This paper mainly discusses the calculation method and the influencing factors of eddy current losses in a novel current sensor based on giant magnetostrictive materials, and introduces the structure of the sensing unit of the current transformer based on magnetostrictive material. Based on the Maxwell equations the magnetic field model of the giant structure is established. The Bessel function is used to solve the equations and obtain the internal magnetic field distribution function with many variables. And then we use the knowledge of electromagnetic field to calculate the eddy current loss and analyze the factors that affect the eddy current loss. We analyze the influence of working frequency and GMM's radius on the eddy current losses. This paper provides the basis for compensating the eddy current loss.
The new current transformer based on giant magnetostrictive material can meet the needs of smart grid for high accuracy and stability testing. But the eddy current loss caused by giant magnetostrictive material will be in the form of heat loss performance, influencing the working precision and service life of the sensor. This paper mainly discusses the calculation method and the influencing factors of eddy current losses in a novel current sensor based on giant magnetostrictive materials, and introduces the structure of the sensing unit of the current transformer based on magnetostrictive material. Based on the Maxwell equations the magnetic field model of the giant structure is established. The Bessel function is used to solve the equations and obtain the internal magnetic field distribution function with many variables. And then we use the knowledge of electromagnetic field to calculate the eddy current loss and analyze the factors that affect the eddy current loss. We analyze the influence of working frequency and GMM's radius on the eddy current losses. This paper provides the basis for compensating the eddy current loss.
引文
[1]Wakiwaka H,Aoki K,Yoshikawa T,et al.Maximum output of a low frequency sound source using giant magnetostrictive material[J].Alloys Comp,1997,258(8):87-92.
[2]唐志峰.超磁致伸缩微位移驱动器的非线性磁滞建模及控制方法[J].机械工程学报,2008,43(6):55-61.
[3]Eda H,Ohmura E,Sahashi M,et al.Ultraprecise machine tool equipped with a giant magnetostriction actuatordevelopment of new materials,TbxDy1-x(Fey,Mn1-y)n,and their application[J].CIRP Annals-Manufacturing Technology,1992;41(1):421-424.
[4]Vranish J M.Magnetostrictive direct drive rotary motor development[J].IEEE Trans Magn,1991,27(6):5355-5357.
[5]Ohmata K,Zaike M,Koh T.A three-link arm type vibration control device using magnetostrictive actuators[J].J Alloys Compds,1997,258(1):74-78.
[6]Teer J P,Sendaula M H,John Vranish,et al.Magnetostrictive linear motor development[J].IEEE Trans Magn,1998,34(4):2081-2083
[7]张峰.基于超磁致伸缩材料的气动高速开关阀的设计研究[D].杭州:浙江大学,2012
[8]Li P Y.Dynamic Redesign of a Flow Control Servovalve Using a Pressure Control Pilot[J].J Dyna Syst Meas Cont,2002,124(3):428-434.
[9]闻凤连.基于光纤位移传感器的巨磁伸材料磁伸系数测量仪研制[D].镇江:江苏大学,2010.
[10]陶孟仑,陈定方,卢全国,等.超磁致伸缩材料动态涡流损耗模型及试验分析[J].机械工程学报,2013,48(13):146-151.
[11]王雷,谭久彬,刘玉涛.超磁致伸缩体内涡流效应有限元分析[J].光学精密工程,2006,14(3):445-449.
[12]Slaughter J.Investigation of eddy current losses in laminated Terfenol-D drivers[J].Journal of the Acoustical Society of America,2001,109(5):2435.
[13]张玲.基于超磁致伸缩材料的光纤光栅电流传感器[D].镇江:江苏大学,2009.
[14]张红菊.稀土超磁致伸缩电流传感器的研究[D].北京:中国科学院研究生院(西安光学精密机械研究所),2008.
[15]张成明.超磁致伸缩致动器的电-磁-热基础理论研究与应用[D].哈尔滨:哈尔滨工业大学,2013.
[16]陈丽香,王雪斌,李敏.永磁体涡流损耗的分析[J].微电机,2015,(6):13-16,22.
[2]唐志峰.超磁致伸缩微位移驱动器的非线性磁滞建模及控制方法[J].机械工程学报,2008,43(6):55-61.
[3]Eda H,Ohmura E,Sahashi M,et al.Ultraprecise machine tool equipped with a giant magnetostriction actuatordevelopment of new materials,TbxDy1-x(Fey,Mn1-y)n,and their application[J].CIRP Annals-Manufacturing Technology,1992;41(1):421-424.
[4]Vranish J M.Magnetostrictive direct drive rotary motor development[J].IEEE Trans Magn,1991,27(6):5355-5357.
[5]Ohmata K,Zaike M,Koh T.A three-link arm type vibration control device using magnetostrictive actuators[J].J Alloys Compds,1997,258(1):74-78.
[6]Teer J P,Sendaula M H,John Vranish,et al.Magnetostrictive linear motor development[J].IEEE Trans Magn,1998,34(4):2081-2083
[7]张峰.基于超磁致伸缩材料的气动高速开关阀的设计研究[D].杭州:浙江大学,2012
[8]Li P Y.Dynamic Redesign of a Flow Control Servovalve Using a Pressure Control Pilot[J].J Dyna Syst Meas Cont,2002,124(3):428-434.
[9]闻凤连.基于光纤位移传感器的巨磁伸材料磁伸系数测量仪研制[D].镇江:江苏大学,2010.
[10]陶孟仑,陈定方,卢全国,等.超磁致伸缩材料动态涡流损耗模型及试验分析[J].机械工程学报,2013,48(13):146-151.
[11]王雷,谭久彬,刘玉涛.超磁致伸缩体内涡流效应有限元分析[J].光学精密工程,2006,14(3):445-449.
[12]Slaughter J.Investigation of eddy current losses in laminated Terfenol-D drivers[J].Journal of the Acoustical Society of America,2001,109(5):2435.
[13]张玲.基于超磁致伸缩材料的光纤光栅电流传感器[D].镇江:江苏大学,2009.
[14]张红菊.稀土超磁致伸缩电流传感器的研究[D].北京:中国科学院研究生院(西安光学精密机械研究所),2008.
[15]张成明.超磁致伸缩致动器的电-磁-热基础理论研究与应用[D].哈尔滨:哈尔滨工业大学,2013.
[16]陈丽香,王雪斌,李敏.永磁体涡流损耗的分析[J].微电机,2015,(6):13-16,22.