无弹簧永磁直线振荡电机定位力特性分析  

Detent force analysis of springless permanent magnet linear oscillatory machine

作　　者：葛健 柏丽丽 徐伟[1] 董义鹏 李明贤 GE Jian;BAI Lili;XU Wei;DONG Yipeng;LI Mingxian(State Key Laboratory of Advanced Electromagnetic Technology,Huazhong Univ.of Science and Technology,Wuhan 430074,China;Jingke Electric Co.,Ltd.,Zibo 255086,China)

机构地区：[1]华中科技大学强电磁技术全国重点实验室,武汉430074 [2]淄博京科电气有限公司,山东淄博255086

出　　处：《海军工程大学学报》2023年第5期21-27,共7页Journal of Naval University of Engineering

基　　金：国家自然科学基金面上项目(52277050);深圳国际合作研究项目(GJHZ20210705142539007)。

摘　　要：无弹簧永磁直线振荡电机可利用自身定位力等效弹簧回复力,能够克服机械弹簧引起的质量大、体积大、成本高等缺点,是线性压缩机系统的有效解决方案。为研究无弹簧永磁直线振荡电机在电枢反应下的定位力特性,首先介绍了电机结构及运行原理;然后,通过考虑铁心饱和的等效磁路法、基于有限元仿真的冻结磁导率法和公式推导法分析了无弹簧直线振荡电机在不同工况下的定位力特性,并对结果进行了对比。研究结果表明:负载过大将使电机定位力线性度降低、动子平衡位置偏移、功率密度下降、撞缸风险增加,因此在设计此类电机时有必要考虑相关因素。By using the detent force as an equivalent spring force,the disadvantages of large mass,large volume and high cost caused by mechanical springs can be overcome,which is an effective solution for linear compressor system.In order to study the detent force of the springless linear oscillatory machine under different working conditions,the structure and operation principle of the motor were introduced firstly.Then,several analysis methods,including the equivalent magnetic circuit method considering saturation effect of the iron core,the frozen permeability method and the formula derivation method based on finite element simulation software were adopted to analyze the detent force performance under different working conditions,and the forces from different methods were compared.The results show that overload will reduce the linearity of detent force,offset the balance position of mover,reduce the power density of motor and increase the risk of cylinder collision.Therefore,it is necessary to consider the relevant factors when designing this type of motors.

关 键 词：无弹簧永磁直线振荡电机 定位力 等效磁路法 冻结磁导率 

分 类 号：TM359.4[电气工程—电机]