轴向永磁磁悬浮飞轮电机损耗计算与温度场分析*

doi:10.11985/2022.04.017

电气工程学报 ›› 2022, Vol. 17 ›› Issue (4): 174-180.doi: 10.11985/2022.04.017

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轴向永磁磁悬浮飞轮电机损耗计算与温度场分析^*

朱志莹¹^,²(), 张巍¹(), 朱海浪¹(), 邵淋晶¹()

1.南京工程学院电力工程学院南京 211167
2.东南大学电气工程学院南京 210096

收稿日期:2021-09-10 修回日期:2011-12-08 出版日期:2022-12-25 发布日期:2023-02-03
作者简介:朱志莹，男，1984年生，教授，硕士研究生导师。主要研究方向为磁悬浮电机与飞轮储能系统。E-mail：zyzhu@njit.edu.cn
张巍，男，1994年生，硕士研究生。主要研究方向为飞轮储能电机多物理场分析。E-mail：wzhang@njit.edu.cn
朱海浪，男，1996年生，硕士研究生。主要研究方向为飞轮储能电机数学模型。E-mail：hlzhu@njit.edu.cn
邵淋晶，女，1997年生，硕士研究生。主要研究方向为飞轮储能球面电机优化设计。E-mail：ljshao@njit.edu.cn
基金资助:
*国家自然科学基金(51977103);国家自然科学基金(51877101);中国博士后科学基金(2018M632201);江苏省高等学校自然科学基金(20KJA470004);江苏省“青蓝工程”和“六大人才高峰”(GDZB-026);江苏省研究生科研与实践创新计划(SJCX21_0951)

Analysis of Loss and Temperature Field of Axial Permanent Magnet Magnetic Bearingless Flywheel Machine

ZHU Zhiying¹^,²(), ZHANG Wei¹(), ZHU Hailang¹(), SHAO Linjing¹()

1. School of Electric Power Engineering, Nanjing Institute of Technology, Nanjing 211167
2. School of Electrical Engineering, Southeast University, Nanjing 210096

Received:2021-09-10 Revised:2011-12-08 Online:2022-12-25 Published:2023-02-03

摘要/Abstract

摘要：

轴向永磁磁悬浮飞轮电机多运行于大功率快速充放电状态，较高的功率密度和内定子拓扑结构使其存在热负荷大、损耗复杂、温升显著等突出问题，为此开展轴向永磁磁悬浮飞轮电机损耗计算与温度场分析研究。阐述了轴向永磁磁悬浮飞轮电机基本结构与工作原理，采用改进变系数IEM5模型建立了考虑高频下集肤效应对涡流损耗影响的电机精确温度场分析模型，分析得到了该电机在不同转速下的损耗变化规律。在此基础上，基于三维有限元仿真进行电机稳态温度场计算，进而根据温度场计算结果更新电磁材料温度属性参数以及电机损耗，通过磁-热双向耦合有限元法分析得到更为准确的电机最高温升和温度分布情况，为轴向永磁磁悬浮飞轮电机复杂运行工况下的散热优化设计和高效应用提供参考依据。

关键词: 磁悬浮飞轮电机, 变系数IEM5模型, 磁-热双向耦合, 电机损耗, 温升

Abstract:

The axial permanent magnet magnetic bearingless flywheel machines(APM-BFM) mostly operate in high power fast charging and discharging state, and its high power density and internal stator topology make it suffer from prominent problems such as high thermal load, complex losses and significant temperature rise. The basic structure and operating principle of the APM-BFM are described, and an accurate temperature field analysis model considering the effect of skin effect on eddy current losses at high frequencies is developed using a modified variable coefficient IEM5 model, and the loss variation pattern of the machine at different speeds is analysed. Based on this, a three-dimensional finite element simulation is used to calculate the steady-state temperature field of the machine, and the temperature property parameters of the electromagnetic material and the machine losses are updated according to the results of the temperature field calculation, so that a more accurate analysis of the maximum temperature rise and temperature distribution of the machine can be obtained through the magnetic-thermal bi-directional coupled finite element method. This will provide a reference for the optimal design and efficient application of heat dissipation in complex operating conditions of APM-BFM.

Key words: Bearingless flywheel machine, variable coefficient IEM5 model, two-way magnetic and thermal coupling, machine loss, temperature rise

中图分类号:

TM352

朱志莹, 张巍, 朱海浪, 邵淋晶. 轴向永磁磁悬浮飞轮电机损耗计算与温度场分析^*[J]. 电气工程学报, 2022, 17(4): 174-180.

ZHU Zhiying, ZHANG Wei, ZHU Hailang, SHAO Linjing. Analysis of Loss and Temperature Field of Axial Permanent Magnet Magnetic Bearingless Flywheel Machine[J]. Journal of Electrical Engineering, 2022, 17(4): 174-180.

图/表 11

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参数	数值	参数	数值
转子外径/mm	130	隔磁环厚度/mm	3
转子轭高/mm	7	悬浮铁心轭厚/mm	7
转子内径/mm	102	悬浮铁心内径/mm	36
转子极弧/(°)	15	悬浮极极弧/(°)	30
平均气隙长度/mm	0.3	悬浮绕组匝数	100
定子外径/mm	101.4	叠长/mm	60
转矩铁心内径/mm	56	永磁体轴向长度/mm	3
转矩极极弧/(°)	15	永磁体外径/mm	50
转矩铁心轭厚/mm	8	永磁体内径/mm	30
转矩绕组匝数	80	定转子铁心材料	DW360-50

材料名称	电导率/(MS/m)	温度系数
铜	≥58	0.003 8
永磁体	0.7	0.006 5
硅钢片	2.3	0.005

材料名称	导热系数/ [W/(m·K)]	材料密度/ (kg/m³)	比热容/ [J/(kg·K)]
铁心	径向40.6/轴向0.95	7 700	426
绕组	386	8 954	383.1
绕组绝缘	0.3	1 300	1 340
等效气隙	0.098	1.205	1 005

轴向永磁磁悬浮飞轮电机损耗计算与温度场分析^*

Analysis of Loss and Temperature Field of Axial Permanent Magnet Magnetic Bearingless Flywheel Machine

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