考慮端部效應的電磁直線執(zhí)行器解析建模方法

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中圖分類號：TM359.4 文獻標識碼：A DOI：10.7535/hbkd.2025yx04002

Analytical modeling method for electromagnetic linear actuators considering end effects

LIYuxin，LI Bo，GE Wenqing，LUJiayu，CHENJiewei （Schoolof Transportationand VehicleEngineering，Shandong Universityof Technology，Zibo，Shandong 2550o，China

Abstract：Inordertosolve theproblemof magneticfielddistortioncausedbythehigh magnetic permeabilityoftheend cover of movingcoil electromagneticlinearactuator，which leadstofluctuations inthethrustofactuatorandtheinaccuracyof the analyticalsolution，amagneticfieldanalyticalmodelingmethodcombiningthepseudo-periodmethodandthemagneticvector potential methodwas proposed.Considering theendefect，the virtualarraywas extended toboth sidesof thepermanent magnetandwindingarrayinthepseudo-periodtocompensatetheend magneticcircuit，andtheanalytical expresionsof the magneticfielddistributionof theopencircuitandarmaturereactionwerederived intheformofFourierseries.Onthis basis， theanalytical expressionof electromagnetic thrust wasderivedbyLorentzforce method.Theresultsshow thatcompared with finite element simulation，the maximum error of the analyzed thrust value is 9.04% when ignoring the end cap，while the maximum error of the analyzed thrust value is 3.97% when considering the end effect，which verifies the effectiveness of the proposed method；the average relative error of the experiment is 3.77% ，which verifies the correctness of the proposed method.This methodcanefectivelyconsiderthe influenceof theendcaponthe magnetic fielddistortion，which provides theoreticalreferenceforsolvingtheelectromagneticcharacteristicsof theelectromagneticlinearactuatorquicklyandacurately， optimizing the structural parameters and the control process.

Keywords：electrical machinery；movingcoilelectromagneticlinearactuator；analyticalmodeling；pseudo-periodicmethod; end effect

動圈式電磁直線執(zhí)行器與旋轉(zhuǎn)電機相比，沒有機械齒輪或傳動機構(gòu)，具有結(jié)構(gòu)簡單、效率高、推力密度高的特點，現(xiàn)已常用于軍事、高精度車床及汽車等領域[1]。（剩余10759字）