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中南大学学报(自然科学版)

Journal of Central South University

第48卷    第10期    总第278期    2017年10月

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文章编号:1672-7207(2017)10-2641-08
一种采用同型号电机互为负载的直线电机推力波动测试方法
周振宇,周海波,段吉安,王伟华

(中南大学 高性能复杂制造国家重点实验室,湖南 长沙,410083)

摘 要: 针对传统推力波动测试方法精度不高、结构复杂的问题,提出一种采用同型号直线电机互为负载来测量直线电机推力(PMLSM)波动的方法。根据直线电机中齿槽效应和端部效应的作用机理,将2套同种型号的永磁直线电机刚性连接互为负载,通过改变电机动子之间的相位差来测量两直线电机叠加推力波动进而得到单个电机的推力波动。首先,通过分析推力波动中定位力和纹波推力与位移速度的关系,建立关于电机动子间位置差、相位差的数学模型,并进行叠加推力波动有限元分析;然后,通过改变动子间相位差进行推力波动测试,研究叠加推力随相位差改变的波动规律;最后,采用数字滤波和傅里叶变换,研究从叠加推力波动信息中精确提取单个电机推力波动的方法,得到与有限元分析结果基本一致的定位力和推力波动波形。研究结果表明:该方法能快速、精确地测量直线电机推力波动,且具有较高的测量精度。

 

关键字: 推力波动;定位力;负载;PMLSM

Thrust fluctuation measurement of PMSLM by the same model motor of mutual load
ZHOU Zhenyu, ZHOU Haibo, DUAN Ji’an, WANG Weihua

State Key Laboratory of High Performance Complex Manufacturing,Central South University, Changsha 410083, China

Abstract:Aimed at the low measuring precision and complex construction in traditional thrust fluctuation test, a novel method for the thrust fluctuation measurement of PMSLM by the same model motor of mutual load was proposed. According to the principle of cogging effect and end effect, the two same types of permanent magnet linear motors were rigidly connected and mutually loaded by moving the distance between the two motors. Then phase difference was adjusted to measure the thrust fluctuation of the motors. The relationship of detent force and thrust ripple between displacement and velocity was analyzed. The mathematic model and the finite element model were established. Then the experiments of thrust ripple were carried out, to study the superposition thrust regular fluctuation with phase difference. And the force of different distances was contrasted by digital filtering and Fourier transform, which studied the method of extracted thrust wave from two-motor thrust coupling fluctuation under different phases. The results show that this method can measure the thrust fluctuation quickly and accurately.

 

Key words: thrust ripple; detent force; load; PMLSM

中南大学学报(自然科学版)
  ISSN 1672-7207
CN 43-1426/N
ZDXZAC
中南大学学报(英文版)
  ISSN 2095-2899
CN 43-1516/TB
JCSTFT
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