铝电磁半连续铸造智能复合磁场控制器的研究与设计

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1、ABSTRACTAluminumelectromagneticcastingisanewmaterialproeessingmethodthatcombinesthemagneto—hydrodynamics(MHD)theoryandthedevelopedcastingengineering．Aluminumcrystalisrefinedandcasting-rollingstrip’Sperformanceisimprovedbyintroducingspecialelectromagneticfieldintothecontinuouscas

2、tingzonetochangesolidificationandcrystallizationconditionformoltenaluminum．ThePaperanalysesthemathematicalmodelandthefunctionalmechanismofcompoundmagneticfield．Basedontheanalysis，thespecificrequirementsoftheelectromagneticfieldcontrollerareputforward．Inordertomatchtherequirement

3、s，thevariablefrequencyconverterwhichisaAC-DC-ACconvenerisadoptedinthesystem．Andaclosed．100poutputcurrentcon仃olmethodbasedontheSinusoidalpulseWidthModulation(SPWM)isdesigned．SothatcurrentisforcedtotracereferenceandgoodcontrolperformanceiSobtained．Becauseofdi伍curiesinmodelingelect

4、romagneticinductionsetprecisely,self-adaptivePIDcontrolarithmeticbaseonsingleneuronisadoptedtocontrolthecurrentoutput．AndthesoftwareandhardwareschemesofcontrolsystemareresearchedinthePap％TM$320F2808isthesystemcontrolcore．Modularizationdesignphilosophyisadoptedindesignofperiphery

5、circuitandsomemodulesareemphasizedinthepaper,suchasdrivingcircuitsofInsulated-GateBipolarTransistor(IGBT)，human-machineinterfacemoduleandcommunicationmodule．ThepaperresearchstheSPWMwaveformgenerator,CANbuscommunicationprotocolandcommunicationsoftwareinsoftwaredesign．Singleneuron

6、self-adaptivePIDcontrollerandthevariablefrequencycontrolsystemarestudiedandsimulatedbymatlab．Simulationresultsshowthatsingleneuronself-adaptivePIDcontrolarithmeticCaneffectivelyimprovedynamicperformanceofcontrollerandgetbettercontroleffectthanroutinePID．Andtheresearchanddesignof

7、intelligentcontrolsystemcallachieveexpectedpurposeandobtainidealloadcurrentwaveform．Finally,thispapermakessomeconclusions，andpresentssomenissuesforfutureresearch．KEYWORDSelectromagneticallycasting，AC—DC—ACfrequencyconversiontechnology,SPWM，SingleneuronPID，TMS320F2808III原创性声明本人声明

8、，所呈交的学位论文是本人在导师指导下进行的研究工作及取得的研究成果。尽我所知，除了论文中特别加