首页|Electromagnetic characteristic analysis and design of a linear motor used for ultra-high-speed EMS maglev train
Electromagnetic characteristic analysis and design of a linear motor used for ultra-high-speed EMS maglev train
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The operating speed of the commercial electromagnetic suspension(EMS)maglev train has been over 430 km/h,making it the fastest means of land transportation.With the increasing demands of people traveling,it is necessary to further improve the operating speed of maglev trains.Aiming to examine whether the existing EMS system can meet the requirements of ultra-high-speed 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 article.First,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 force.Second,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 ripple.Third,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 poles.Furthermore,the Taguchi method is used to further improve the electromagnetic characteristics of the linear electric motor.Finally,the effectiveness of the proposed optimal design is validated by the finite-element analysis(FEA)based co-simulation.
ultra-high-speed maglev transportationelectromagnetic suspension(EMS)linear motorelectromagnetic force ripple suppression
GAO Han、SHI TingNa、GAO XinMai、LEI YanXiao、YAN Dong、GUO LiYan、YAN Yan
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College of Electrical Engineering,Zhejiang University,Hangzhou 310027,China
Zhejiang University Advanced Electrical Equipment Innovation Center,Hangzhou 311107,China
State Key Laboratory of High-speed Maglev Transportation Technology Qingdao 266100,China
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