新型机械变漏磁永磁电机设计与电磁特性分析  

Design and Electromagnetic Characteristics Analysis of a Novel Mechanical Variable Leakage Flux Permanent Magnet Machine

作　　者：邹永玲 刘细平 孙同泽 ZOU Yongling;LIU Xiping;SUN Tongze(School of Electrical Engineering and Automation,Jiangxi University of Science and Technology,Ganzhou 314000,Jiangxi,China)

机构地区：[1]江西理工大学电气工程与自动化学院,江西赣州341000

出　　处：《电气传动》2022年第4期36-41,55,共7页Electric Drive

基　　金：国家自然科学基金(51767009);江西省教育厅科技计划项目(GJJ160598);江西理工大学清江青年英才计划资助。

摘　　要：提出了一种新型机械变漏磁永磁(MVLF-PM)电机,该电机采用一个附加在转子侧的机械装置,能根据速度改变永磁体磁化方向相对d轴的角度,实现漏磁通的自动调节,有效拓宽了电机的调速范围。首先分析了该电机的工作原理并构建了数学模型,运用系统动力学方法探究了弹簧形变长度、永磁体旋转角度与转速的关系;然后运用有限元方法对该电机和传统三角型永磁(D-PM)电机的弱磁调速特性及机械强度进行了对比分析;最后,通过对一台1 kW样机的弱磁性能进行测试,验证了MVLF-PM电机设计理论与有限元分析结果的有效性与准确性。A novel mechanical variable leakage flux permanent magnet(MVLF-PM)motor was proposed. A mechanical device attached to the rotor side was adopted in this motor,which can change the angle of the PM magnetization direction relative to d-axis according to the speed,so as to adjust the leakage flux automatically and effectively broaden the speed range of motor. The working principle and the mathematical model of MVLF-PM motor were analyzed. Based on system dynamics method,the relationship between the deformation length of spring as well as the rotation angle of PMs and speed were studied. The speed regulation characteristics and mechanical strength of the MVLF-PM and delta permanent magnet(D-PM)motor were compared and analyzed by using finite element method. Finally,the flux-weakening performance of a prototype with 1 kW was tested,which verifies the validity and accuracy of the design theory and finite element analysis results of the MVLF-PM motor.

关 键 词：永磁电机 机械装置 变漏磁 宽调速 

分 类 号：TM351[电气工程—电机]