基于DSP的方圓坯電磁攪拌系統(tǒng)的研究與開發(fā).pdf

1、湖南大學(xué)碩士學(xué)位論文基于DSP的方圓坯電磁攪拌系統(tǒng)的研究與開發(fā)姓名：袁超申請(qǐng)學(xué)位級(jí)別：碩士專業(yè)：電氣工程指導(dǎo)教師：歐陽紅林20110519AbstractSteelremainstobetheirreplaceablematerialusedinthedevelopmentofhumansociety，duetoitsexcellentperformanceandreclaimablepropertyInthepast20years，C

2、hinesesteelindustryhasmadegreatprogressContinuouscastingtechnologyobtainsremarkableprogressesButinthesolidificationprocessofcontinuouscastingstrand，columnarcrystalisdevelopedduetofastcoolingrate，likelytocausethephenomeno

3、nofbridgingresultinginthedefectssuchasporosity，segregation，looseneSS，inclusionconglomerationintheslabTesolvetheaboveproblems，electromagneticstirringtechnique(EMS)wasinventedaccordinglyTheapplicationofEMSdeviceisnotonlyfa

4、vorableforimprovingthesolidificationstructureofthecastingstrand，butlsalsoaneffectivemeasuretoimprovethestrandsurfacequalityThepaperfirstintroducesthehistoryandtrendofEMS，andanalyzesthedevelopmentdirectionThendetailesanal

5、ysisanddescriptionalltheimportantpartofelectromagneticstirringsystem，includingEMS，lowvoltagefrequencyconVener，coolingwatefsystemaandSOonThepapershowsthemaincircuit，controlboardanddriverboardoflowvoltagefrequencyconverter

6、，anddetailesdescriptionofthemainfunctionsofhardwarecircuitfollowedbypaperanalyzesthemainflowchanandsoftwareflowchartofeachfunction，andanalysishowtoachievePWMalgorithmbasicontherulesamplingmethodForacompletesystem，thecomm

7、unicationISveryimportantInthisdesign，theProfibus—DPcommunicationwasused，thispaperglVestheProfibus—DPcommunicationprotocol，andrealizessuchcommunlcatlonusedTMS320F2812chipBasedontheapplication，inthethesis，theactualwaveform

8、soflowvoltagefrequencyconverterandrenderingsofEMSwasgivenObviously，ithasasignificanteffectinweakeningthedefectssuchasporosity，segregation，looseness，inclusiOnconglomerationintheslabKeyWords：continuouscastingtechnology；ele