面向运动平稳性的直线电机推力频谱特征分析

马成方 1; 杨晓君 1; 张俊 1; 吕盾 1; 2; 赵万华 1; 2

doi:10.7652/xjtuxb201508008

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面向运动平稳性的直线电机推力频谱特征分析

更新时间：2025-07-09

- 面向运动平稳性的直线电机推力频谱特征分析
- Spectrum Characteristics of Thrust in Linear Motor Oriented to Motion Stability
- 西安交通大学学报 2015年49卷第8期页码：45-51+115
- 作者机构：
  
  1. 西安交通大学机械工程学院,西安,710049
  2. 西安交通大学机械制造系统工程国家重点实验室,西安,710049
- 作者简介：
- 基金信息：
  
  : 2015-01-27。作者简介: 马成方(1990—),男,硕士生;赵万华(通信作者),男,教授,博士生导师。基金项目: 国家自然科学基金重点资助项目(51235009)
- DOI：10.7652/xjtuxb201508008
  中图分类号： TH113.2
- 网络首发：2015-08-10，
  
  纸质出版：2015
- 稿件说明：
移动端阅览
马成方 1, 杨晓君 1, 张俊 1, 等. 面向运动平稳性的直线电机推力频谱特征分析[J]. 西安交通大学学报, 2015,49(8):45-51+115.

Spectrum Characteristics of Thrust in Linear Motor Oriented to Motion Stability[J]. 2015, 49(8): 45-51+115.
马成方 1, 杨晓君 1, 张俊 1, 等. 面向运动平稳性的直线电机推力频谱特征分析[J]. 西安交通大学学报, 2015,49(8):45-51+115. DOI： 10.7652/xjtuxb201508008.

Spectrum Characteristics of Thrust in Linear Motor Oriented to Motion Stability[J]. 2015, 49(8): 45-51+115. DOI： 10.7652/xjtuxb201508008.

摘要

针对直线电机推力谐波直接作用于驱动部件会降低进给系统运动平稳性的问题

综合考虑伺服驱动电路和电机结构非线性

利用等效磁化电流法和麦克斯韦方程

得到了纹波力、齿槽力、端部力、齿槽效应与电流谐波耦合力以及电感不对称力等5部分推力谐波的解析表达式。计算过程考虑了多个谐波因素之间的耦合作用

弥补了以往单一因素分析直线电机推力谐波的不足。研究结果表明:受驱动电路和电机结构非线性的影响

直线电机推力夹杂有众多的谐波成分

而且各个谐波成分之间相互耦合; 这些推力谐波直接作用于机械系统

会造成进给系统显著的位移波动; 随着进给速度的增加

推力谐波影响增大

尤其在进给速度为5、20和33 m/min附近

推力谐波激起了机械系统共振

位移波动急剧增大; 纹波推力幅值随着驱动电流谐波幅值的减小而减小; 电机的极距与齿槽距之比、齿槽开口与齿槽距之比

对于齿槽力的主要谐波阶次以及幅值都有重要影响

尤其当齿槽开口与齿槽距之比为0.625时

齿槽力各阶次谐波均为0。

Abstract

Harmonic force of linear motor acts directly on the drive element

which reduces the motion stability of the feed system. The servo drive circuit and the nonlinear of motor structure are considering. With the equivalent magnetizing current method and Maxwell equations

the analytic expression of ripple force

cogging force

end effect force

coupling force and inductance asymmetry force are obtained. In the computation process

the coupling effect between multiple harmonic factor is considered

which makes up for the former single factor analysis of harmonic force. The results show that the thrust in the linear motor contains multiple harmonic force

influenced by the servo drive circuit and the nonlinear of motor structure

and each harmonic component gets mutually coupled. These harmonic force acts directly on the mechanical system to lead to the displacement wave of feed system. The effect of the harmonic force rises with the increasing speed. Near the speed of 5

20 and 33 m/min

the harmonic force results in system resonance to seriously weaken motion stability of the feed system. The amplitude of ripple force declines with the decreasing amplitude of the harmonic current. The ratio between pole pitch and tooth space pitch and ratio between tooth space opening and pitch exert an important influence on the harmonic frequency and amplitude of cogging force

especially

the cogging force disappears in the ratio of tooth space opening and pitch of 0.625.

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