基于场路耦合的机器人永磁电动机损耗及其温升分析-豆柴文库

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基于场路耦合的机器人永磁电动机损耗及其温升分析
Abstract
Thispaperanalyzesthelossesandtemperatureriseofpermanentmagnetmotorsforrobotsbasedonfield-circuitcoupling.Thelossandtemperaturerisedistributionofthemotorunderdifferentloadsisstudiedbycombiningtheelectromagneticfieldsimulationandcircuitsimulation.Theanalysisresultsshowthatthelossesandtemperatureriseofthemotorincreasewiththeincreaseoftheload.Thetrendoftemperatureriseofdifferentpartsisalsodifferentduetodifferentstructuresofthemotor.Theresultsofthisstudyprovideguidanceforthedesignandoperationofrobotpermanentmagnetmotors.
Introduction
Permanentmagnetmotorsarewidelyusedinvariousfieldsduetotheirhighefficiency,smallsize,andlightweight.Forrobots,theuseofpermanentmagnetmotorscanimprovetheagilityandaccuracyoftherobot'smovements.However,thepermanentmagnetmotoralsohasthedisadvantageofbeingsensitivetotemperature.Thetemperatureriseofthemotorcannotonlycausethermalexpansionanddeformation,butalsoaffectthemagneticpropertiesofthepermanentmagnetandreducethemotor'soutputpowerandefficiency.Therefore,theanalysisofthemotor'slossandtemperaturerisedistributionisofgreatsignificanceforimprovingtheperformanceandreliabilityoftherobot.
Methodology
Thepermanentmagnetmotorisatypicalfield-circuitcouplingsystem.Theelectromagneticfielddistributioninsidethemotorisaffectedbythecurrentandvoltageofthecircuit,andthetemperatureriseofthemotorisaffectedbythelossesgeneratedbytheelectromagneticfield.Therefore,asimulationmethodbasedonfield-circuitcouplingisusedinthisstudytoanalyzethelossandtemperatureriseofthemotor.
Firstly,the3Dmodelofthemotorisestablishedintheelectromagneticfieldsimulationsoftware.Thestatorandrotorcore,winding,permanentmagnet,andhousingaremodeledindetail.Thedistributionofelectromagneticparameterssuchasmagneticfield,magneticfluxdensity,andeddycurrentinthemotoratdifferentloadsiscalculatedbysolvingMaxwell'sequations.Secondly,thecircuitmodelofthemotorisestablishedinthecircuitsimulationsoftware,andthemotor'sperformanceparameterssuchasvoltage,current,andspeedareanalyze