讲座时间：2018年6月13日（周三）, 13:00—15:00
讲座地点：泰山科研楼326
讲座题目：电动汽车双三相电机设计、多相逆变器直流排电容设计
讲座摘要：
Thepresentation willdiscussthe findingsfrom2Ph.D. research studies:
(1)“DualThree-PhasePermanentMagnetSynchronousMachineInvestigationforBatteryElectric VehiclePower-trains”
AdualthreephasemachinewithIPMrotoranddistributedwindinghasbeenstudiedandcompared to a commercial automotivetraction machine, theNissanLeafIPM machine. Theperformanceof thetwodesigns arecompared fortypicaltractionoperatingpoints,viahigh torque,low speed and lowtorque,highspeed,constantpowerfieldweakening operation.Thedualthree-phasemachine is shown to haveimproved torquedensityand torquequalitywithoutcompromisingefficiency.
(2) “Multiphase Voltage Source Inverter DC-link Capacitor Considerations”
Theinvestigationmethodologyandprocedureforarbitraryphasenumbertwolevelvoltagesource inverter(VSI)DC-linkcapacitorsaredevelopedincludingVSI DC-linkcapacitorintroduction, multiphaseVSI modellingandinvestigationmethodandcapacitorrequirementsetc.,basedon whichtheDC-linkcapacitorrequirementsareanalytically characterizedfordifferentphase numberVSIs.Undertheequitableoperating conditions,theincreaseofthephasenumber inherently alleviatestheDC-linkcapacitorrequirements.Otherfactors,e.g.switching strategies, carrierwaveformsandinterleavingtechniques,alsodeterminetheDC-linkcapacitorrequirements. ForthehigherphasenumberVSIs,theirincreasedconfigurationflexibilitiesmake itpossibleto furtherdecreasetheDC-linkcapacitorrequirements.Thestudyispartially validated experimentallythroughthe3-and9-phaseVSIsdrivingbrushlesspermanentmagnet(BLPM) machines.Finally,theDC-linkcapacitor designprocedure is proposedfor twolevelmultiphase VSIs.
主讲人简介：
Nigel Schofield received the degrees of B.Eng. (Hons.) in Electrical Power Engineering, and Ph.D. for research on the field-weakening capability of brushless permanent-magnet traction machines from the University of Sheffield, UK. He held academic posts at the Universities of Sheffield and Manchester, UK. He has also been a Design Engineer in industry, UK. From2013 to 2017 he was Full Professor with Tenure in the ECE Dept. at McMaster University, Ontario, Canada. In May 2017 he started in a new post as Professor in Electrical Engineering at the University of Huddersfield, UK.His research interests include electro-magnetic power-trains for all- and hybrid-electric vehicles. Prof. Schofield is a member of the IET and IEEE and a Chartered Engineer.
Contact details:
Nigel Schofield
University of Huddersfield, UK
Email: n.schofield@hud.ac.uk
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