带屏蔽结构双边直线感应电机模型及参数研究  

Study of model and parameters of double-side linear induction motor with shielding structure

作　　者：张育兴[1] 谢小虎 高子超 ZHANG Yuxing;XIE Xiaohu;GAO Zichao(National Key Laboratory of Electromagnetic Energy,Naval Univ.of Engineering,Wuhan 430033,China)

机构地区：[1]海军工程大学电磁能技术全国重点实验室,武汉430033

出　　处：《海军工程大学学报》2025年第1期72-77,共6页Journal of Naval University of Engineering

基　　金：电磁能技术全国重点实验室资助课题(614221722050501)。

摘　　要：电磁发射要求的直线电机推力较大,为了达到设计的推力,电机驱动电流需要达到数千甚至上万安培,由此带来强大的泄漏磁场,对直线电机周围的其他电气设备正常工作产生干扰,还会对人体健康造成危害。因此,为了屏蔽强大的泄露磁场,建立了一种带屏蔽结构的双边直线感应电机模型。首先,建立了带屏蔽结构直线电机的等效电路模型;然后,分析了横向边端效应对屏蔽板导体涡流的影响,随着频率的增加,屏蔽板导体边缘的涡流损耗增大,屏蔽板的电磁参数也不再是固定值,并利用3D有限元数值计算屏蔽板参数;最后,通过试验进行了验证。仿真和试验结果均表明:屏蔽板参数值随着频率变化而变化,等效电阻值随着频率的提高而增大。The linear motor thrust required by an electromagnetic launcher is large,with the motor drive current needing to reach thousands or even tens of thousands of amperes so as to achieve the desired thrust.This high current results in a strong leakage magnetic field.This will disrupt the normal operation of other electrical equipment around the linear motor and may also be hazardous to human health.Therefore,a model of a double-sided linear induction motor with shielding structure was built to shield the strong magnetic leakage field.Firstly,the equivalent circuit model of linear motor with shielding structure was established.Then,the influence of transverse edge-end effects on eddy currents in shielded plate conductors was analyzed.As the frequency increases,the eddy current loss at the edge of the shielding plate increases,resulting in a non-constant electromagnetic parameter for the shielding plate.The parameters of the shielding plate were obtained from the results calculated with 3D finite element method(3D FEM).Finally,the analyses were validated by the test data.The simulation and experimental results confirm that the shielding plate parameter values vary with frequency and its equivalent resistance increases with frequency.

关 键 词：电磁发射 直线感应电机 横向边端效应 3D有限元法 

分 类 号：TM346[电气工程—电机] TM359.4