一种新型四象限洛伦兹力电机的设计及优化方法  

The design and optimization method of a novel four-quadrant Lorentz force motor

作　　者：孟祥瑞 王常虹[1] 钟佳朋 夏红伟[1] MENG Xiangrui;WANG Changhong;ZHONG Jiapeng;XIA Hongwei(Space Control and Inertial Technology Research Center,Harbin Institute of Technology,Harbin 150001)

机构地区：[1]哈尔滨工业大学空间控制与惯性技术研究中心,哈尔滨150001

出　　处：《中国惯性技术学报》2024年第9期938-947,954,共11页Journal of Chinese Inertial Technology

基　　金：国家重点研发计划资助(2020YFC2200604)。

摘　　要：为满足六自由度隔振平台(VIP)高定位精度、高动态响应和短运动行程的使用需求,设计了一种应用在六自由度隔振平台的新型四象限洛伦兹力电机,这种电机具有低推力波动和小耦合力的优点。首先介绍了提出的新型四象限洛伦兹力电机的结构和工作原理。然后基于等效电流法和永磁体镜像法推导这种电机磁场分布以及电磁力情况。并且分析不同结构参数对气隙磁场以及电磁力的影响,再基于遗传算法在兼顾推力波动、耦合力的情况下对推力密度进行参数优化。最后,根据提出的电机电磁力模型进行3D有限元仿真和实验验证,实验结果表明,所设计电机在线圈电流为5 A,y、z向位移台运动位移在-1 mm~1 mm时,推力波动小于0.23%,耦合力在19.3 mN以内。In order to meet the needs of high position accuracy,fast dynamic response,and short motion travel of the 6-DOF vibration isolation platform(VIP).A novel four-quadrant Lorentz force motor(FQLFM)applied on the 6-DOF VIP is designed.The structure of this LFM has low force fluctuation and low coupling force.First,the basic structure and operating principle of the proposed FQLFM are presented.Second,the expressions of the magnetic field and electromagnetic force are obtained based on an equivalent current model and permanent magnet mirror method.Then,different structural parameters on the distribution of air gap magnetic field and electromagnetic force are analyzed.Third,the parameters for thrust density are optimized based on genetic algorithm considering of force fluctuation and coupling force.Finally,based on the proposed electromagnetic force model of FQLFM,3D finite element simulation and experimental verification are conducted.The experimental results show that the force fluctuation and the coupling force of the designed motor are less than 0.23%and 19.3 mN,respectively,when the coil current of the designed motor is 5 A,and the motion displacement of the displacement machine in y and z direction is-1 mm~1 mm.

关 键 词：六自由度隔振平台 新型四象限洛伦兹力电机 磁场分布 力特性 参数优化。 

分 类 号：U666.1[交通运输工程—船舶及航道工程]