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Electromagnetic characteristic analysis and design of a linear motor used for ultra-high-speed EMS maglev train

Science China(Technological Sciences) 2024年第6期67卷 1957-1973页

作者： GAO Han SHI TingNa GAO XinMai LEI YanXiao YAN Dong GUO LiYan YAN Yan College of Electrical Engineering Zhejiang UniversityHangzhou310027China Zhejiang University Advanced Electrical Equipment Innovation Center Hangzhou311107China State Key Laboratory of High-speed Maglev Transportation Technology Qingdao266100China CRRC Qingdao Sifang Co.Ltd. Qingdao266111China

The operating speed of the commercial electromagnetic suspension(EMS)maglev train has been over 430 km/h,making it the fastest means of land *** the increasing demands of people traveling,it is necessary to further improve the operating speed of maglev *** to examine whether the existing EMS system can meet the requirements of ultra-highspeed operation(more than 600 km/h),the electromagnetic characteristics of an EMS linear motor under the operating speed of 600–1000 km/h fed by a square-wave voltage supply is investigated in this ***,an electromagnetic field model of the EMS system under the square-wave voltage supply is established to investigate its electromagnetic performance,e.g.,the characteristics of phase current,the magnetic flux density,and the electromagnetic ***,the relationship between the harmonic components of the air-gap magnetic flux density and electromagnetic force is investigated using the two-dimensional fast Fourier transform(2D-FFT)to reveal the mechanism of electromagnetic force ***,to address the issues of excessive armature current density and significant electromagnetic force ripple,the linear motor is re-designed by enlarging the stator slot area and reshaping the mover's main magnetic ***,the Taguchi method is used to further improve the electromagnetic characteristics of the linear electric ***,the effectiveness of the proposed optimal design is validated by the finite-element analysis(FEA)based co-simulation.

关键词： ultra-high-speed maglev transportation electromagnetic suspension(EMS) linear motor electromagnetic force ripple suppression

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Design to Improve Thrust Force Performance of Dual-side Primary Permanent-magnet Vernier linear motor

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中国电气工程学报(英文) 2023年第2期9卷 1-13页

作者： Jinghua Ji Xuhui Zhu Hongyu Tang Liang Xu Wenxiang Zhao School of Electrical and Information Engineering Jiangsu UniversityZhenjiang 212013China School of Electrical Engineering Nantong UniversityNantong 226019China School of Electrical and Information Zhenjiang CollegeZhenjiang 212028China

A novel dual-side primary permanent-magnet vernier linear(DS-PPMVL)motors is *** novelty of the proposed motors is the design of asymmetric consequent poles on the mover,which can effectively enforce the flux-modulation effect and improve the thrust force ***,the topologies and operation principle are ***,the structure relationships between the existing and proposed motors are ***,a unified analytical model is ***,the magnetic field generated by the consequent pole is ***,the performance improvement mechanism with the asymmetric consequent pole is *** improve the efficiency of motor optimization,multi-objective optimization method is adopted to obtain the global optimal solution combination of structure *** proposed motors exhibit higher thrust force,higher force density,less PM consumption,and better overload performance than the existing DS-PPMVL ***,experiments are conducted based on the existing prototype to verify the accuracy of the design and analysis.

关键词： Consequent pole dual-side motor flux modulation linear motor primary permanent-magnet

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Analysis of Electromagnetic Characteristics of a Novel Toroidal Acceleration linear motor

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CES Transactions on Electrical Machines and Systems 2022年第2期6卷 113-117页

作者： Zhentian Liu Qiaopeng Zhou Weichao Li National Key Laboratory of Science and Technology on Vessel Integrated Power System Naval University of EngineeringWuhan 430000China School of Electrical and Electronic Engineering Naval University of EngineeringWuhan 430000China

A high thrust density linear motor,which adopts a novel toroidal structure,applying to load acceleration in confined space is *** basic structure of the toroidal acceleration permanent magnet synchronous linear motor(TA-PMLSM)is depicted,both with its parameters *** main characteristics such as air gap magnetic density and electromagnetic thrust are discussed by establishing the electromagnetic field equation in the cylindrical coordinate *** simulation comparison between the Halbach permanent magnet array and the classical radial one is also made to get a higher density of the magnetic and electromagnetic *** with the conventional radial permanent magnet array,results show that the amplitude of back EMF of ring motor under the action of Halbach permanent magnet array has a better sinusoidal,the magnetic density of the air gap increases by 1.3 times,the thrust density increases by 1.42 times,and the main harmonic content of the two referred physical quantity decreases significantly.

关键词： Toroidal motor linear motor Electromagnetic field analysis.

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A HIGH VELOCITY FEED UNIT DRIVEN BY linear motor

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Chinese Journal of Mechanical Engineering 2000年第4期13卷 266-272页

作者： Zhang Bolin Chen Yanji Li Zhiying Liu Yurong Luo Yong (Department of Mechanical and Electronical Engineering， Guangdong University of Technology) 广东工业大学广东广州

In order to realize high speed machining, the special requirements for feed transmission system of the CNC machine tool have to be satisfied. A high velocity feed unit driven by a induction linear motor is developed. ... 详细信息

关键词： High speed machining Machine tool Feed system linear motor

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Design of magnet arrays for permanent magnetic linear motor

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Frontiers of Electrical and Electronic Engineering in China 2008年第3期3卷 358-363页

作者： Junhong MAO Junhang LUO Qiang JIANG Youbai XIE School of Mechanical Engineering Xi’an Jiaotong UniversityXi’an 710049China School of Electrical Engineering Xi’an Jiaotong UniversityXi’an 710049China

An iron-less single side permanent magnetic linear motor structure is presented,and two-dimensional analytical formulae for its magnetic field are deduced to design the types of magnetic arrays,the thickness of permanent magnet,and the duty ratio of magnet arrays,*** certain design parameters,conventional arrays are used instead of a piecewise Halbach arrays,and the machining and assembling of the motor are greatly *** results coincide with that of *** analytical formulae can be used in designing cored linear motors by modifying boundary conditions.A linear motor driven bench with a single degree of freedom is realized,where the travel reaches 27 mm,the mass of the moving parts is 1.4 kg,and the maximum acceleration is 11.5 m/s^(2).

关键词： linear motor permanent magnet array parameter design

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Improved Study on Position Measurement System for linear motor Applied in Electromagnetic Launch System

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CES Transactions on Electrical Machines and Systems 2019年第2期3卷 216-220页

作者： Wanzhi Rui Mingjin Xu Penghui Guo Jin Xu National Key Laboratory for Vessel Integrated Power System Technology Naval University of EngineeringWuhan 430033 China

The linear motor applied in electromagnetic emission system uses a closed loop position control strategy,which needs a set of position measurement system with high reliability,high resolution and integration to achieve real-time acquisition and analysis of position *** existing position controller is based on the simple logic chip design without memory function,and does not have the storage analysis and preprocessing function to position ***,the system has insufficient scalability,low integration and *** at the improvement of the existing position measurement system,an intelligent position measurement system integrating the functions of position signals acquisition,processing and uploading,data storage and analysis is proposed in this paper,and its working principle and system composition are discussed in *** position,speed and acceleration obtained on the electromagnetic emission platform are in good agreement with the expected value of the *** results,the feasibility and accuracy of the improved integrated intelligent position measurement system are verified,and the control performance of the system is also satisfied well,which can be good guidance and reference for subsequent engineering practice.

关键词： Electromagnetic emission linear motor position measurement system position controller.

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linear motor Motion Control using Fractional Order Sliding Mode Controller with Friction Compensation

Linear Motor Motion Control using Fractional Order Sliding M...

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第36届中国控制会议

作者： Zhiqiang Ma Guanghui Sun Zhihao Cheng Zhengkai Li Research Institute of Intelligent Control and Systems Harbin Institute of Technology

ISBN: (纸本)9781538629185

This paper presents a fractional order sliding mode control for motion control of linear *** to global memory characteristics and actual nature expression,fractional calculus is introduced into the design of sliding mode surface to achieve precision tracking of reference signals,and it is first to design a fractional order sliding mode controller for linear motor *** model is employed to compensate sliding friction occurring between ball-bearing and liner guide to further improve tracking *** uncertainty of linear motor is also taken into account in the controller *** results demonstrate that the proposed controller not only owns high precision tracking performance,but also has strong robustness to uncertainty and disturbance.

关键词： Fractional order sliding mode control linear motor Motion control LuGre model

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The Dynamic test of Novel Punch Driven by linear motor

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International Journal of Plant Engineering and Management 2001年第2期6卷 87-91页

作者： BU Zeng-wen, YANG Hong Hefei University of Technology, Hefei 230009, P. R. China Hefei University of Technology Hefei 230009 P. R. China

The key character of punch is its impulsion. For the novel punch driven by linear motor, the computer-aided test system is used. Its frequency performance is calculated by the identification method according to the dynamic demarcation. This dynamic test system presented here can be applied in the sample machines under development and performance test of finished products.

关键词： computer-aided test system punch linear motor dynamic test

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Adaptive PI Control Strategy for Flat Permanent Magnet linear Synchronous motor Vibration Suppression

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Chinese Journal of Mechanical Engineering 2013年第1期26卷 11-20页

作者： MENG Fanwei LIU Chengying LI Zhijun WANG Liping Institute of Manufacturing Engineering Tsinghua University

Due to low damping ratio, fiat permanent magnet linear synchronous motor＇s vibration is difficult to be damped and the accuracy is limited. The vibration suppressing results are not good enough in the existing research because only the longitudinal direction vibration is considered while the normal direction vibration is neglected. The parameters of the direct-axis current controller are set to be the same as those of the quadrature-axis current controller commonly. This causes contradiction between signal noise and response. To suppress the vibration, the electromagnetic force model of the flat permanent magnet synchronous linear motor is formulated first. Through the analysis of the effect that direct-axis current noise and quadrature-axis current noise have on both direction vibration, it can be declared that the conclusion that longitudinal direction vibration is only related to the quadrature-axis current noise while the normal direction vibration is related to both the quadrature-axis current noise and direct-axis current noise. Then, the simulation test on current loop with a low-pass filter is conducted and the results show that the low-pass filter can not suppress the vibration but makes the vibration more severe. So a vibration suppressing strategy that the proportional gain of direct-axis current controller adapted according to quadrature-axis reference current is proposed. This control strategy can suppress motor vibration by suppressing direct-axis current noise. The experiments results about the effect of Kp and Ti on normal direction vibration, longitudinal vibration and the position step response show that this strategy suppresses vibration effectively while the motor＇s motion performance is not affected. The maximum reduction of vibration can be up to 40%. In addition, current test under rated load condition is also conducted and the results show that the control strategy can avoid the conflict between the direct-axis current and the quadrature-axis

关键词： permanent magnet motor linear motor motor vibration vibration suppression

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CLAMP STEPPER PIEZOELECTRIC linear motor WITH COMPOSITE OF TWO AMPLIFICATIONS

CLAMP STEPPER PIEZOELECTRIC LINEAR MOTOR WITH COMPOSITE OF T...

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2015全国压电和声波理论及器件技术研讨会

作者： Lu HAN Wei-qing HUANG Yin WANG State Key Laboratory of Mechanics and Control of Mechanical Structures（Nanjing University of Aeronautics and Astronautics）

This study presents a new type of linear motor based on the micro-vibration of piezoelectric *** working mechanism of the motor was *** the clamping structure and overall structure of motor was ***,the best size of the flexible structures was obtained by means of finite element analysis method on the clamping *** prototype was manufactured and *** the speed characteristic curve of motor is *** experimental results on the prototype verify the feasibility of the scheme,by applying voltage signal of peak to peak value 100V and frequency of 150 Hz,the no-load speed is 1.23 mm/s and the thrust is 1.6 N,and it meets the basic requirement of the precision of linear feed system.

关键词： linear motor Clamping mechanism Stacked piezoelectric ceramic Drive foot

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