1.1 MW高速内置式永磁同步电机新型转子拓扑设计与强度优化  

Novel rotor topology design and strength optimization of 1.1 MWhigh speed interior permanent magnet synchronous motor

作　　者：谢颖[1] 王泽兵 蔡蔚 李道璐 杨艳会 张燚 XIE Ying;WANG Zebing;CAI Wei;LI Daolu;YANG Yanhui;ZHANG Yi(School of Electrical and Electronic Engineering,Harbin University of Science and Technology,Harbin 150080,China)

机构地区：[1]哈尔滨理工大学电气与电子工程学院,黑龙江哈尔滨150080

出　　处：《电机与控制学报》2024年第6期66-75,共10页Electric Machines and Control

基　　金：国家自然科学基金区域创新发展联合基金重点支持项目(U21A20145);国家自然科学基金(52377045);黑龙江省自然科学基金重点项目(ZD2022E006)。

摘　　要：大功率高速永磁电机中通常采用绑扎碳纤维护套的方式来降低转子应力,然而护套厚度过大会导致等效气隙增加,电机性能随之降低。针对这一问题,设计了一种具有新型转子拓扑结构的1.1 MW、18 000 r/min的内置式高速永磁同步电机。该结构采用永磁体分段设计,并增设加强筋,分担转子隔磁桥处的应力,使护套厚度得到有效降低。同时,将转子外部隔磁桥处替换为非导磁填充块,阻断漏磁路径,提升永磁体利用率。最后,有限元分析结果表明,相较于初始模型,新型结构电机在等效气隙增大1.5 mm的情况下,输出转矩达到600.44 N·m,增加了16.86 N·m,并且新型转子铁心最大应力降低了496.82 MPa,转子结构的机械强度得到显著提高,可为大功率高速永磁电机转子拓扑设计提供参考。In high-power and high-speed permanent magnet motors,carbon fiber banding is commonly used to reduce maximum rotor stress.However,the retaining sleeve may enlarge the thickness of equivalent air-gap,resulting in a decrease in motor performance.To solve this problem,a 1.1 MW,18000 r/min interior permanent magnet synchronous motor with a novel rotor topology was designed.In the structure the permanent magnet segment design was adopted,and the strengthening rib was added to disperse the stress at the magnetic bridge,so that the thickness of the retaining sleeve can be effectively reduced.At the same time,the external magnetic bridge was replaced with non-magnetic fillers to block the magnetic leakage path,so as to improve the utilization of permanent magnet.Finally,the finite element method analysis results show that compared with the initial model,under the condition of the equivalent air-gap of the novel structure motor is increased by 1.5 mm,the output torque reaches 600.44 N·m,an increase of 16.86 N·m.In the meanwhile,the maximum stress of the novel rotor is reduced by 496.82 MPa,the rotor mechanical strength of the novel structure motor is significantly improved,which can provide reference for the rotor topology design of high-power and high-speed permanent magnet motors.

关 键 词：高速永磁电机 转子机械强度 碳纤维护套 加强筋 非导磁填充块 

分 类 号：TM355[电气工程—电机]