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六相永磁容错轮毂电机多物理场综合设计方法

郭嗣 郭宏 徐金全

郭嗣, 郭宏, 徐金全等 . 六相永磁容错轮毂电机多物理场综合设计方法[J]. 北京航空航天大学学报, 2019, 45(3): 520-528. doi: 10.13700/j.bh.1001-5965.2018.0360
引用本文: 郭嗣, 郭宏, 徐金全等 . 六相永磁容错轮毂电机多物理场综合设计方法[J]. 北京航空航天大学学报, 2019, 45(3): 520-528. doi: 10.13700/j.bh.1001-5965.2018.0360
GUO Si, GUO Hong, XU Jinquanet al. Integrated design method of six-phase fault-tolerant permanent magnet in-wheel motor based on multi-physics fields[J]. Journal of Beijing University of Aeronautics and Astronautics, 2019, 45(3): 520-528. doi: 10.13700/j.bh.1001-5965.2018.0360(in Chinese)
Citation: GUO Si, GUO Hong, XU Jinquanet al. Integrated design method of six-phase fault-tolerant permanent magnet in-wheel motor based on multi-physics fields[J]. Journal of Beijing University of Aeronautics and Astronautics, 2019, 45(3): 520-528. doi: 10.13700/j.bh.1001-5965.2018.0360(in Chinese)

六相永磁容错轮毂电机多物理场综合设计方法

doi: 10.13700/j.bh.1001-5965.2018.0360
基金项目: 

国家自然科学基金 51707004

航空科学基金 2016ZC51025

中央高校基本科研业务费专项资金 YWF18BJY166

详细信息
    作者简介:

    郭嗣  男, 博士研究生。主要研究方向:永磁容错电机设计与驱动控制

    郭宏  男, 博士, 教授, 博士生导师。主要研究方向:机载电气系统设计、特种电机设计及其驱动控制

    徐金全  男, 博士, 讲师。主要研究方向:高可靠电机设计及其驱动控制

    通讯作者:

    徐金全, E-mail:xujinquan@buaa.edu.cn

  • 中图分类号: TM351

Integrated design method of six-phase fault-tolerant permanent magnet in-wheel motor based on multi-physics fields

Funds: 

National Natural Science Foundation of China 51707004

Aeronautical Science Foundation of China 2016ZC51025

the Fundamental Research Funds for the Central Universities YWF18BJY166

More Information
  • 摘要:

    针对电动装甲车用轮毂电机工况复杂多变,发热严重的问题,通过对电机所涉及各物理场之间关系的分析,提出了一种永磁容错轮毂电机多物理场设计方法。利用该方法对一台电动装甲车用额定功率50 kW,最高转速6 000 r/min六相永磁容错轮毂电机进行了综合设计。在电机结构初步设计基础上,通过电磁-应力耦合分析,在兼顾电磁性能和转子强度的情况下对转子隔磁磁桥进行优化设计;通过电磁-温度耦合分析计算了电机内各区域温度分布,并对永磁体在极限温度下的退磁进行了校核;通过应力-温度耦合设计完成了转子与护套的最大应力计算,校核了护套厚度及过盈量。仿真结果表明,基于多物理场综合设计方法得到的电机能同时满足电磁性能、温度限制以及机械强度的要求,电机可靠性得到了提高。

     

  • 图 1  永磁容错轮毂电机内部各物理场之间的耦合关系

    Figure 1.  Coupling relationship between physical fields within fault-tolerant permanent magnet in-wheel motor

    图 2  多物理场综合设计方法流程

    Figure 2.  Procedure of integrated design method based on multi-physics fields

    图 3  六相永磁容错轮毂电机有限元模型

    Figure 3.  Finite element model of six-phase fault-tolerant permanent magnet in-wheel motor

    图 4  一对极下转子结构模型

    Figure 4.  Rotor structure model under a pair of poles

    图 5  转子最大机械应力及电机空载漏磁系数与隔磁磁桥尺寸之间的关系曲线

    Figure 5.  Maximum rotor mechanical stress and leakage coefficient under different sizes of flux barrier

    图 6  6 000 r/min工作点电机输出转矩与转速曲线

    Figure 6.  Curves of output torque and speed of motor at 6 000 r/min

    图 7  电机自感与互感曲线

    Figure 7.  Curves of self and mutual inductances of motor

    图 8  电机短路电流

    Figure 8.  Short-circuit current of motor

    图 9  不同工况下电机损耗有限元计算结果

    Figure 9.  FEA-calculated losses of motor under different operation conditions

    图 10  电机温度分布

    Figure 10.  Temperature distribution of motor

    图 11  短路故障永磁体磁密分布云图

    Figure 11.  Magnetic flux density distribution contour of permanent magnets under short-circuit failure

    图 12  转速为0 r/min,温度为80℃下电机转子等效应力分布云图

    Figure 12.  Equivalent stress distribution contour of motor rotor at speed of 0 r/min and temperature of 80℃

    图 13  转速为6 000 r/min,温度为140℃下电机转子热应力分布云图

    Figure 13.  Thermal stress distribution contour of motor rotor at speed of 6 000 r/min and temperature of 140℃

    表  1  电机主要参数

    Table  1.   Main parameters of motor

    参数 数值
    额定功率/kW 50
    额定转速/(r·min-1) 1000
    最高转速/(r·min-1) 6000
    相数 6
    定子槽数/极数 12/10
    定子外径/mm 450
    定子内径/mm 335
    转子外径/mm 327
    转子内径/mm 250
    铁心轴向长度/mm 150
    注:永磁体材料为 SmCo24;定转子铁心材料为 20WTG1500。
    下载: 导出CSV

    表  2  电机温度

    Table  2.   Temperature of motor

    温度 工作点1 工作点2 工作点3-单相开路 工作点3-单相短路
    绕组平均温度 121.8 113.4 148.4 148.2
    绕组最高温度 142.3 116.4 184.2 185.2
    永磁体温度 130.6 135.3 141.6 146.6
    定子平均温度 100.0 125.5 108.4 106.5
    转子平均温度 128.7 131.4 139 143.2
    下载: 导出CSV

    表  3  转子材料性能参数

    Table  3.   Material property parameters of rotor

    参数 20WTG1500 SmCo24 碳纤维
    密度/(kg·m-3) 7650 8300 1560
    弹性模量/GPa 190 130 210
    泊松比 0.26 0.23 0.307
    抗拉强度/MPa 370 35 1 750
    热膨胀系数/(10-6K-1) 11.5 6.9 -0.38
    下载: 导出CSV

    表  4  转速为0 r/min,温度为80℃下电机转子各部分应力计算结果

    Table  4.   Stress calculation results of each part of motor rotor at speed of 0 r/min and temperature of 80℃

    MPa
    应力 护套最大应力(切向) 永磁体最大应力(径向) 转子最大应力(等效)
    数值 293.2 -4.7 68.4
    下载: 导出CSV

    表  5  转速为6 000 r/min,温度为140℃下电机转子各部分应力计算结果

    Table  5.   Stress calculation results of each part of motor rotor at speed of 6 000 r/min and temperature of 140℃

    MPa
    应力 护套最大应力(切向) 永磁体最大应力(径向) 转子最大应力(等效)
    数值 696.4 -56.3 237.3
    下载: 导出CSV
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出版历程
  • 收稿日期:  2018-06-14
  • 录用日期:  2018-09-03
  • 网络出版日期:  2019-03-20

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