离散电流对精密线圈磁场影响的研究  

Study on precise coil magnetic field affected by discrete current

作　　者：赵建亭[1] 贺青[2] 鲁云峰[2] 李正坤[2] 

机构地区：[1]清华大学精密仪器与机械学系,北京100081 [2]中国计量科学研究院电学量子所,北京100013

出　　处：《仪器仪表学报》2009年第4期756-759,共4页Chinese Journal of Scientific Instrument

基　　金：国家科技支撑计划(2006BAF06B01)资助项目

摘　　要：研究了通常用电流片模型来近似计算线圈磁场时被忽略的由于导线电流的离散而引起的附加磁场的变化规律,指出此种附加磁场会随着离开导线距离的增加而迅速衰减。此结论可用于指导精度要求较高的线圈磁场系统的设计,如用于质子回旋磁比γp′测量的高精度亥姆霍兹线圈的设计和用于普朗克常数h测量的焦耳天平系统中的精密互感线圈的设计等。The additional magnetic field from a discrete distribution of current, which is usually neglected in an approximate current sheet model calculation, is discussed in this paper. This additional magnetic field is shown to attenuate rapidly with the distance between the wire and the observing point. And the result obtained in the calculation can be applied to the design of precision coils. For example, this result can be used to guide the design of the Helmholtz coil used to measure the gyro-magnetic ratio of proton γp′ and the design of precise mutual inductance coil used in the Joule balance system that is used to measure thep lanck constant h.

关 键 词：线圈磁场计算 测试计量 精密互感线圈设计 

分 类 号：TB971[一般工业技术—计量学]