Overview of Thrust Ripple Suppression Technique for Linear Motors

中国电气工程学报（英文） ›› 2016, Vol. 2 ›› Issue (1): 77-84.

Overview of Thrust Ripple Suppression Technique for Linear Motors

Mingyi Wang, Liyi Li^*, and Rui Yang

School of Electrical Engineering and Automation, Harbin Institute of Technology, Harbin, 150001, China

出版日期:2016-01-20 发布日期:2019-10-31
通讯作者: *, E-mail: liliyi.hit@gmail.com
作者简介:Mingyi Wang was born in Jilin, China. He received the B.E. M.E., and Ph.D. degrees in electrical engineering from Harbin Institute of Technology (HIT), Harbin, China, in 2009, 2011 and 2016, respectively. He is currently with the Institute of Electromagnetic and Electronic Technology, HIT. His research interests include motor drive control, power electronic applications and magnetic levitation.
Liyi Li (M’09) received the B.E., M.E., and D.E. degrees from the Harbin Institute of Technology (HIT), Harbin, China, in 1991, 1995, and 2001, respectively. Since 2004, he has been a Professor with the School of Electrical Engineering and Automation, HIT. He has authored or coauthored more than 110 technical papers and is the holder of 50 patents. His research areas are in control and drive of linear motors, linear electromagnetic launch, accumulation of electric energy, and superconducting motors.
Rui Yang was born in Hubei, China. He received the B.E. degree in electrical engineering from Harbin Institute of Technology (HIT), Harbin, China, in 2015. He is currently working toward the Ph.D. degree in the Institute of Electromagnetic and Electronic Technology, HIT. His research interest is high-performance motion and motor drive control.
基金资助:
Supported by the State Key Program of National Natural Science of China (51537002), the National Natural Science Foundation of China (51177024) and the Natural Science Foundation for Distinguished Young Scholars of China (51225702).

Overview of Thrust Ripple Suppression Technique for Linear Motors

Mingyi Wang, Liyi Li^*, and Rui Yang

School of Electrical Engineering and Automation, Harbin Institute of Technology, Harbin, 150001, China

Online:2016-01-20 Published:2019-10-31
Contact: *, E-mail: liliyi.hit@gmail.com
About author:Mingyi Wang was born in Jilin, China. He received the B.E. M.E., and Ph.D. degrees in electrical engineering from Harbin Institute of Technology (HIT), Harbin, China, in 2009, 2011 and 2016, respectively. He is currently with the Institute of Electromagnetic and Electronic Technology, HIT. His research interests include motor drive control, power electronic applications and magnetic levitation.
Liyi Li (M’09) received the B.E., M.E., and D.E. degrees from the Harbin Institute of Technology (HIT), Harbin, China, in 1991, 1995, and 2001, respectively. Since 2004, he has been a Professor with the School of Electrical Engineering and Automation, HIT. He has authored or coauthored more than 110 technical papers and is the holder of 50 patents. His research areas are in control and drive of linear motors, linear electromagnetic launch, accumulation of electric energy, and superconducting motors.
Rui Yang was born in Hubei, China. He received the B.E. degree in electrical engineering from Harbin Institute of Technology (HIT), Harbin, China, in 2015. He is currently working toward the Ph.D. degree in the Institute of Electromagnetic and Electronic Technology, HIT. His research interest is high-performance motion and motor drive control.
Supported by:
Supported by the State Key Program of National Natural Science of China (51537002), the National Natural Science Foundation of China (51177024) and the Natural Science Foundation for Distinguished Young Scholars of China (51225702).

摘要/Abstract

摘要： Direct-drive actuators, linear motors are widely used in many industrial and military applications, particularly in high-end manufacturing due to advantages of high force density, rapid dynamic response, and low thermal losses. Permanent magnet linear synchronous motors (PMLSMs) can dramatically improve the dynamic and static performance of the motion system. However, as one of the most critical sources of error, the thrust ripple of linear motors can deteriorate performance and even excite the mechanical resonance. Thrust ripple suppression technology had received broad interest and has been researched extensively. Therefore, this paper summarizes different types of thrust ripple suppression methods and their principles are analyzed in detail. Firstly, structural optimization methods are introduced to suppress the thrust ripple and increase the precision of the thrust. Secondly, control methods are described to decrease the velocity fluctuation caused by the thrust ripple. Thirdly, a combination of structural design and control method is presented to compensate the ripple, meaning high order harmonic components are eliminated by permanent magnets (PM) skewing technology and low order harmonic are compensated by a linearization observer. Finally, conclusions are made regarding thrust ripple suppression technology and the future trend is proposed.

关键词: Linear motor, thrust ripple, structural optimization, control method

Abstract: Direct-drive actuators, linear motors are widely used in many industrial and military applications, particularly in high-end manufacturing due to advantages of high force density, rapid dynamic response, and low thermal losses. Permanent magnet linear synchronous motors (PMLSMs) can dramatically improve the dynamic and static performance of the motion system. However, as one of the most critical sources of error, the thrust ripple of linear motors can deteriorate performance and even excite the mechanical resonance. Thrust ripple suppression technology had received broad interest and has been researched extensively. Therefore, this paper summarizes different types of thrust ripple suppression methods and their principles are analyzed in detail. Firstly, structural optimization methods are introduced to suppress the thrust ripple and increase the precision of the thrust. Secondly, control methods are described to decrease the velocity fluctuation caused by the thrust ripple. Thirdly, a combination of structural design and control method is presented to compensate the ripple, meaning high order harmonic components are eliminated by permanent magnets (PM) skewing technology and low order harmonic are compensated by a linearization observer. Finally, conclusions are made regarding thrust ripple suppression technology and the future trend is proposed.

Key words: Linear motor, thrust ripple, structural optimization, control method

Mingyi Wang, Liyi Li, and Rui Yang. Overview of Thrust Ripple Suppression Technique for Linear Motors[J]. 中国电气工程学报（英文）, 2016, 2(1): 77-84.

Mingyi Wang, Liyi Li, and Rui Yang. Overview of Thrust Ripple Suppression Technique for Linear Motors[J]. Chinese Journal of Electrical Engineering, 2016, 2(1): 77-84.

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Overview of Thrust Ripple Suppression Technique for Linear Motors

Overview of Thrust Ripple Suppression Technique for Linear Motors

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