基于内置式永磁无刷直流电机气隙长度的优化设计  

Optimization Design Based on Air Gap Length of Built-in Permanent Magnet Brushless DC Motor

作　　者：李伟起 林荣文[1] 陶涛 LI Wei-qi;LIN Rong-wen;TAO Tao(College of Electrical Engineering and Automation,Fuzhou University,Fuzhou 350108,China)

机构地区：[1]福州大学电气工程与自动化学院,福建福州350108

出　　处：《电气开关》2020年第5期58-63,共6页Electric Switchgear

摘　　要：为了获得一台运行性能好、效率高、成本低的永磁无刷直流电机,本文基于一台泵用无刷直流电动机提出进行气隙长度的优化。电机的气隙长度是转子外径和定子内径之间的距离,本文通过其对电机的涡流损耗、齿槽转矩和脉动转矩的影响来对电机的气隙长度进行选择。文中先分别分析气隙长度对三者的各自影响,并利用Ansoft软件画出不同气隙长度下的特性曲线,再综合考虑选择一个合适的气隙长度,使其达到既能减少涡流损耗、削弱齿槽转矩,同时又能降低脉动转矩的目的。从而获得一台高效的永磁无刷直流电机。实验结果验证了优化方案的可行性,取得了预期的优化效果。In order to obtain a permanent magnet brushless dc motor with good performance.high efficiency and low cost.this paper proposed to optimize the air gap length based on the brushless dc motor for a pump.The air gap length of the motor is the distance between the outer diameter of the rotor and the inner diameter of the stator.In this paper.the influence of air gap length on the three is analyzed respectively.and the characteristic curves of different air gap length are drawn by Ansoft software.and then an appropriate air gap length is selected after comprehensive consideration.so that it can not only reduce eddy current loss.weaken tooth groove torque.but also reduce the ripple torque.Thus an efficient permanent magnet brushless dc motor is obtained.The experimental results verify the feasi-bility of the optimization scheme and obtain the expected optimization effect.

关 键 词：永磁无刷直流电机 涡流损耗 齿槽转矩 输出转矩 优化设计 

分 类 号：TM33[电气工程—电机]