Field balancing of magnetically levitated motor in high-efficiency and high-accuracy

WANG Ying-guang; FANG Jian-cheng; ZHENG Shi-qiang; ZHANG Yin

doi:10.3788/OPE.20132111.2884

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Field balancing of magnetically levitated motor in high-efficiency and high-accuracy

更新时间：2020-08-12

- Field balancing of magnetically levitated motor in high-efficiency and high-accuracy
- Optics and Precision Engineering Vol. 21, Issue 11, Pages: 2884-2892(2013)
- 作者机构：
  
  1. 北京航空航天大学新型惯性仪表与导航系统技术国防重点学科实验室北京,100191
  2. 北京航空航天大学惯性技术重点实验室北京,100191
- 作者简介：
- 基金信息：
- DOI：10.3788/OPE.20132111.2884
  CLC： TM35
- Received：03 May 2013，
  
  Revised：14 June 2013，
  
  Published Online：22 November 2013，
  
  Published：15 November 2013
- 稿件说明：
移动端阅览
王英广, 房建成, 郑世强, 张寅. 磁悬浮电机高效高精度在线动平衡[J]. 光学精密工程, 2013,21(11): 2884-2892

WANG Yang-An, FANG Jian-Cheng, ZHENG Shi-Jiang, ZHANG Yin. Field balancing of magnetically levitated motor in high-efficiency and high-accuracy[J]. Editorial Office of Optics and Precision Engineering, 2013,21(11): 2884-2892
王英广, 房建成, 郑世强, 张寅. 磁悬浮电机高效高精度在线动平衡[J]. 光学精密工程, 2013,21(11): 2884-2892 DOI： 10.3788/OPE.20132111.2884.

WANG Yang-An, FANG Jian-Cheng, ZHENG Shi-Jiang, ZHANG Yin. Field balancing of magnetically levitated motor in high-efficiency and high-accuracy[J]. Editorial Office of Optics and Precision Engineering, 2013,21(11): 2884-2892 DOI： 10.3788/OPE.20132111.2884.

摘要

提出了一种基于零位移控制的磁悬浮转子在线动平衡方法，用于降低磁悬浮电机的振动并提高悬浮精度。通过在极坐标系中分析磁悬浮转子的静/动不平衡模型，推导出校正质量与磁悬浮系统参数的关系。对各种控制模式下表征校正质量的特点进行分析得出：在零位移模式下，电磁力与不平衡离心力相互抵消，且电磁力是控制电流的线性函数，因此可使用控制电流直接解算校正质量。使用广义选频器控制转子绕其几何轴旋转，获得零位移状态，提取了绕组同频控制电流解算校正质量。最后，针对电流刚度获知误差，在线校正转换系数阵，进行二次高精度平衡。实验结果表明，使用本方法一次启车即可确定校正质量，两次启车校正转换系数阵再次平衡后，转子振动降低98.6%

控制电流降低98.7%，实现了高效高精度动平衡，达到了磁悬浮转子零位移零电流运行状态。

Abstract

A new balancing method based on zero-displacement control for a Magnetically Levitated Rotor (MLR)was proposed to reduce the vibration and to improve the levitation performance of the magnetically Levitated motor (MLM). First

the static/dynamic unbalance models of MLR were discussed in polar coordinates

and the relationship between MLR parameters and correction-masses was derived. After analyzing the characteristics of the above relationships in different control modes

a conclusion was obtained as follows: the correction-masses can be solved from the control current directly in zero-displacement mode

as the electromagnetic force is a linear function of the control current and can be offset by unbalanced centrifugal force. Then

a general frequency selector was utilized to control the rotor to spin around its geometric axis to achieve the zero-displacement mode and the synchronous control currents were extracted to compute the correction-masses. Finally

based on the current stiffness learning errors

the second balancing was completed in high-accuracy by correcting conversion coefficient matrix on line. The experimental results show that the correction-masses can be obtained through a single start-up

and the rotor vibration and control current have reduced by 98.6% and by 98.7% respectively after the second balancing using the corrected conversion-coefficient-matrix. The status of zero-displacement and zero-current are achieved after the field balancing with high-efficiency and high-accuracy.

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references

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