A novel position detection technique for the permanent magnet synchronous linear motor using position detection units

被引：0
|
作者：
Chen Z. [1 ,2 ]
Zhao Y. [1 ,2 ]
Liu X. [1 ,2 ]
Peng K. [1 ,2 ]
Zhao J. [1 ,2 ]
机构：
[1] Engineering Research Center of Mechanical Testing Technology and Equipment, Ministry of Education, Chongqing University of Technology, Chongqing
[2] Chongqing Key Laboratory of Time-Grating Sensing and Advanced Testing Technology, Chongqing
来源：
Yi Qi Yi Biao Xue Bao/Chinese Journal of Scientific Instrument | 2020年 / 41卷 / 12期
关键词：
Measurement standard; Permanent magnet synchronous linear motor; Position detection units; Time grating;
D O I：
10.19650/j.cnki.cjsi.J2007029
中图分类号：
学科分类号：
摘要：
At present, there is lack of effective integration in mechanical structure and electrical functions between the complex electromechanical system and position detection technique. To address this issue, the periodically variable exciting magnetic field of the stator of a permanent magnet synchronous linear motor (PMSLM) is employed as the carrier for spatial displacement measurement. Magnetoresistive sensors and time-grating displacement sensing technique are combined to develop internal position detection units for PMSLM. The travelling wave signal obtained by two induced standing wave signals is utilized to establish the motion reference, which can bridge the relationship between spatial displacement and time standard. The positioning accuracy of the proposed PMSLM without changing any original mechanical structure and electrical characteristics can reach -47.2~49.6 μm within the range of 150 mm, and the measurement resolution can reach 0.15 μm. The proposed integrated position detection technique has advantages of simple mechanical structure and low cost. It can be used as an alternate method for positioning information feedback in some complex electromechanical system instead of some optical grating sensors with medium accuracy. It has a promising value in engineering applications. © 2020, Science Press. All right reserved.
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页码：48 / 55
页数：7
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