高精度球面洛伦兹力磁轴承设计与分析

傅百恒; 王卫杰; 王元钦; 樊亚洪; 聂辰; 贾海鹏

doi:10.13700/j.bh.1001-5965.2021.0103

高精度球面洛伦兹力磁轴承设计与分析

doi: 10.13700/j.bh.1001-5965.2021.0103

1.
航天工程大学研究生院, 北京 101416
2.
航天工程大学宇航科学与技术系, 北京 101416
3.
北京控制工程研究所, 北京 100190
4.
中国人民解放军63961部队, 北京 100020

基金项目:

国家自然科学基金 52075545

详细信息

通讯作者:
王卫杰, E-mail: wangwjie@126.com

中图分类号: V221⁺.3;TB553
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- 文章访问数: 328
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- 被引次数: 0
出版历程
- 收稿日期: 2021-03-02
- 录用日期: 2021-05-05
- 网络出版日期: 2021-05-18
- 整期出版日期: 2022-11-20

Design and analysis of high precision for spherical Lorentz force magnetic bearing

1.
Company of Postgraduate Management, Space Engineering University, Beijing 101416, China
2.
Department of Aerospace Science and Technology, Space Engineering University, Beijing 101416, China
3.
Beijing Institute of Control Engineering, Beijing 100190, China
4.
The 63961th Unit of the PLA, Beijing 100020, China

Funds:

National Natural Science Foundation of China 52075545

More Information

Corresponding author: WANG Weijie, E-mail: wangwjie@126.com

摘要

摘要:
针对柱面洛伦兹力磁轴承(LFMB)偏角有限导致磁悬浮控制敏感陀螺(MSCSG)力矩输出持续时间短和气隙磁密均匀度低影响控制敏感精度的突出问题, 提出了一种高精度球面LFMB设计与分析方法。所设计的LFMB转子球面导磁套和定子球面绕组均与双球面陀螺转子同球心, 气隙呈球壳状, 保证转子偏转时定子绕组两侧气隙宽度不变, 相较于柱面LFMB, 转子可偏转角度由±0.6°扩大到±2°。利用等效磁路法推导了柱面与球面LFMB气隙磁密的数学解析模型, 并基于ANSYS命令流构建了柱面与球面LFMB的有限元仿真模型。仿真结果表明：在转子可偏转范围内, 沿偏转中心线, 球面LFMB最大磁密较柱面下降了34.1%；当转子不偏转时, 球面LFMB绕组截面内的磁密均匀度较柱面提高了11.6%；当转子偏转时, 球面LFMB绕组截面内的磁密均匀度较柱面提高了17.7%。所提方法为磁悬浮控制敏感陀螺控制与敏感性能的提升奠定了基础。
- 磁悬浮控制敏感陀螺 /
- 球面洛伦兹力磁轴承 /
- 磁密均匀度 /
- 等效磁路法 /
- 有限元分析
Abstract:
Aim at solving following problems. Firstly, the limited deflection angle of the cylindrical Lorentz force magnetic bearing (LFMB) can leads to the short duration of torque output of magnetically suspended control and sensing gyroscope (MSCSG). Secondly, the low uniformity of magnetic density between the LFMB's air gap will also affect the control sensitivity of the MSCSG. A high-precision spherical design and analysis of LFMB are proposed. The spherical LFMB's rotor spherical magnetic sleeve and stator spherical winding are both concentric with the double spherical gyroscope rotor, and the air gap is spherical shell shape, which ensures that the width of the air gap on both sides of the winding coil remains unchanged during deflection. Compared to the cylindrical LFMB, the deflection angle of the spherical LFMB is increased from ±0.6° to ±2°. The mathematical analysis model of the air gap magnetic density of the cylindrical and spherical LFMB is derived by the equivalent magnetic circuit method, and the finite element simulation model of the cylindrical and spherical LFMB is constructed based on the ANSYS command stream. The simulation analysis shows that the maximum magnetic density of the spherical LFMB decreases by 34.1% compared to the cylindrical LFMB within the deflection range of the rotor along the deflection centerline. When the rotor is not deflected, the uniformity of the magnetic density at the cross-section of the spherical LFMB coil increases by 11.6% compared to the cylindrical. When the rotor is deflected, the uniformity of the magnetic density at the cross-section of the spherical LFMB coil increases by 17.7% compared to the cylindrical. The proposed method lays the foundation for the improvement of the control and sensitivity of the magnetically suspended control and sensing gyroscope.

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图 1 MSCSG结构与实物图

Figure 1. Structure diagram and material object of MSCSG

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图 2 球面LFMB整体结构示意图

Figure 2. Overall structure diagram of spherical LFMB

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图 3 球面LFMB装配方案

Figure 3. Assembly plan of spherical LFMB

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图 4 磁路图

Figure 4. Magnetic circuit diagram

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图 5 等效磁路图

Figure 5. Equivalent magnetic circuit

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图 6 两种LFMB的有限元建模

Figure 6. Finite element modeling of two LFMBs

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图 7 两种LFMB磁密分布云图及路径

Figure 7. Magnetic density distribution nephogram and paths of two LFMBs

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图 8 两种LFMB气隙磁密强度分布

Figure 8. Magnetic density distribution of two LFMBs

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图 9 两种LFMB绕组截面偏转示意图

Figure 9. Schematic diagram of coil-section deflection of two LFMBs

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表 1 两种LFMB主要参数

Table 1. Main design parameters of two LFMBs

参数	柱面LFMB	球面LFMB
内永磁体内径/mm	119.4	119.4
内永磁体外径/mm	127.4	127.4
内球面导磁套外径/mm	138.2	136
外永磁体内径/mm		152
外永磁体外径/mm	146.2	160
外球面导磁套内径/mm		146.8
磁钢轴向高度/mm	11	13
上下永磁体间轴向距离/mm	4	4
绕组轴向高度/mm	8.5	8.5
设计偏转角度/(°)	±0.6	±2
极限偏转角度/(°)	0.8	2.5
单个绕组沿周向张角/(°)	84	84

下载: 导出CSV

表 2 两种LFMB绕组截面范围内磁密均匀度的对比

Table 2. Comparison of magnetic density uniformity within coil section of two LFMBs

偏转角度/(°)	磁密均匀度
偏转角度/(°)	柱面LFMB	球面LFMB
0	0.882	0.984
0.6	0.834	0.982
2		0.912

下载: 导出CSV

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