微型心脏泵用电机的齿槽转矩数值分析与优化设计  

Numerical Analysis and Optimal Design of Cogging Torque of Mini Heart Pump Motor

作　　者：钱锋 何汉 高宇 王芳群[1] QIAN Feng;HE Han;GAO Yu;WANG Fang-qun(School of Electrical and Information Engineering,Jiangsu University,Zhenjiang 212013,China)

机构地区：[1]江苏大学电气信息工程学院,镇江212013

出　　处：《微特电机》2021年第10期7-11,21,共6页Small & Special Electrical Machines

基　　金：国家自然科学基金项目(51677082)。

摘　　要：微型心脏泵用电机需要满足可植入性强、高血液相容性的特殊要求。电机定子电枢和永磁体之间的相互作用产生的齿槽转矩,使心脏泵在泵血过程中会有摩擦、振动、噪声。依据最简单3槽2极的单元电机模型,在前期研制的6槽4极样机的基础上,设计了9槽6极心脏泵用永磁电机,对齿槽转矩的产生原理进行了分析,并依据该原理运用磁极偏移法对9槽6极的齿槽转矩进行了削弱优化设计。通过有限元法对使用不同极槽配比的电机进行分析优化,通过比较优化前后的齿槽转矩、电磁转矩、转矩脉动、反电动势等数值,验证了该方法的有效性。结果表明,优化后的电机电磁转矩增加了14.3%,转矩脉动降低,有利于心脏泵用电机高效、稳定运行。The motor for a miniature heart pump needs to meet the special requirements of strong implantability and high blood compatibility.Because of the interaction between the stator armature and permanent magnet,the cogging torque produces friction,vibration,and noise in the pumping process of the heart pump.A 9-slot 6-pole permanent magnet motor for a heart pump was designed based on the simplest 3-slot 2-pole unit motor model and the 6-slot 4-pole prototype developed in the early stage.The generation principle of the cogging torque was analyzed,and the weakening optimization design of the 9-slot 6-pole cogging torque was carried out by using the magnetic pole migration method according to the principle.The finite element method was used to analyze and optimize the motor with different pole slot ratios.The numerical values of cogging torque,electromagnetic torque,torque ripple,and back electromotive force before and after optimization were compared,and the effectiveness of the proposed method was verified.The results show that the electromagnetic torque of the optimized motor increases by 14.3%,the torque ripple is reduced,which is conductive to the efficient and stable operation of the heat pump motor.

关 键 词：心脏泵 永磁同步电动机 齿槽转矩 转矩脉动 磁极偏移 

分 类 号：TM351[电气工程—电机]