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【毕业论文设计】基于DSP控制的双闭环直流调速系统设计.doc

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【毕业论文设计】基于DSP控制的双闭环直流调速系统设计.doc

I基于DSP控制的双闭环直流调速系统设计摘要本文介绍的是一种基于DSPTMS320LF2407A芯片的双极性可逆PWM直流调速系统数字控制的设计和基于Matlab的仿真设计。选用三相桥式不可整流电路供电。选用H型双极可逆PWM驱动系统对电机进行控制,在一个PWM周期内,电动机电枢的电压极性呈正负变化。驱动电路采用M57215BL芯片,通过DSP的PWM输出引脚PWM1PWM4输出的控制信号进行控制。用霍尔电流传感器检测电流变化,并通过ADCIN00引脚输入给DSP,经A/D转换产生电流反馈信号。采用增量式光电编码器监测电动机的速度变化,经QEP1和QEP2脚输入给DSP,获得速度反馈信号。通过PDPINIA引脚对电动机提供过电压和过电流保护。运用MATLAB对设计好的系统进行仿真,双闭环调速系统的特征是系统的电流和转速分别由两个调节器控制。速度调节器ASR和电流调节器ACR均设有限幅电路,ASR的输出作为ACR的给定,利用ASR的输出限幅起限制启动电流的作用ACR的输出作为触发器的移相控制电压。系统的建模包括主电路的建模和控制电路的建模。建模完成后即可进行仿真。关键词DSPTMS320LF2407A芯片PWM双闭环直流调速系统数字控制MatlabsimulinkIIPWMDCmotorspeeddigitalcontrolsystemdesignandsimulationAbstractThisarticleisbasedonDSPTMS320LF2407AreversiblechipbipolardigitalcontrolofPWMDCdrivesystemdesignandsimulationofMatlabbaseddesign.Cannotusethreephasebridgerectifiercircuits.UseHtypebipolarreversiblePWMcontrolofthemotordrivesysteminaPWMcycle,themotorarmaturevoltagepolaritywaspositiveandnegativechanges.M57215BLchipdrivercircuit,throughtheDSPsPWMoutputpinsPWM1PWM4outputcontrolsignals.Hallcurrentsensorwithcurrentchanges,andthroughADCIN00pintotheDSP,bytheA/Dconversionproducesthecurrentfeedbacksignal.Anincrementalopticalencodertomonitorthemotorspeedchanges,theQEP1andQEP2pininputtotheDSP,toobtainthespeedfeedbacksignal.ByPDPINIApinprovidedonthemotorvoltageandovercurrentprotection.GoodsystemdesignusingMATLABsimulation,thecharacteristicsofdualloopspeedcontrolsystemisthesystemscurrentandspeedcontrolledbytworegulators.ASRspeedregulatorandcurrentregulatorareequippedwithalimitedincreasecircuitACR,ASRsoutputasgivenACR,theuseofASRsoutputfromtherestrictionslimitingtheroleofstartingcurrentACRoutputasthetriggerphasecontrolvoltage.Systemmodelincludingthemaincircuitmodelingandcontrolcircuitmodeling.Afterthecompletionofthesimulationmodeling.KeywordsTMS329LF2407AchipPWMdoubleclosedloopDCdrivespeedsystemDigitalcontrolMatlabSimulinkIII目录第一章绪论..............................................................................................................................11.1论文选题背景及研究意义...............................................................................................11.2国内外研究现状.............................................................................................................11.3论文研究的主要内容......................................................................................................2第二章方案论证.....................................................................................................................32.1系统设计要求................................................................................................................32.2系统方案选择和总体结构设计......................................................................................32.2.1系统控制对象的确定.............................................................................................32.2.2电动机供电方案的选择.........................................................................................32.2.2系统控制方案选择................................................................................................62.2.3总体结构设计.......................................................................................................82.2.4系统的工作原理...................................................................................................10第三章硬件电路设计...............................................................................................................113.1硬件设计.......................................................................................................................113.1.1主电路选型..........................................................................................................123.1.2整流电路选择......................................................................................................133.1.3PWM变换器设计...................................................................................................133.1.4PWM调速系统主电路............................................................................................143.1.5直流电动机DSP控制和驱动电路..........................................................................153.1.6速度测量.............................................................................................................163.1.7电流检测电路设计...............................................................................................183.1.8IGBT驱动电路设计..............................................................................................183.1.9TMS320LF2407ADSP的结构介绍...........................................................................193.1.10键盘和显示..........................................................................................................233.2主电路中参数计算......................................................................................................233.2.1变压器二次侧电压U2的计算.................................................................................233.2.2一次、二次相电流I1、I2的计算..........................................................................243.2.3变压器容量的计算...............................................................................................24IV3.2.4二极管整流桥VD1VD6的选择............................................................................243.2.5输入滤波电容C0的选型研究.................................................................................253.2.6平波电抗器的设计...............................................................................................253.2.7励磁电路元件的选择............................................................................................26第四章调速系统设计...........................................................................................................274.1模拟控制双闭环直流调速系统电路原理图...................................................................274.2调速系统的静态特性和动态特性分析..........................................................................284.3调速系统调节器设计...................................................................................................304.3.1电流调节器设计...................................................................................................304.3.2转速调节器设计...................................................................................................32第五章仿真设计..................................................................................................................355.1仿真..............................................................................................................................35第六章软件设计..................................................................................................................376.1程序流程图.................................................................................................................376.2定点DSP的数据线Q格式表示方法..............................................................................386.3数字PI调节器的DSP实现方法1................................................................................396.4DSP控制程序的有关参数计算.....................................................................................416.5DSP控制程序..............................................................................................................41总结...............................................................................................................................43参考文献................................................................................................................................44致谢..................................................................................................................................46附录一程序清单..................................................................................................................47附录二系统原理图...............................................................................................................55

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