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1、摘要摘要由于直流电动机结构复杂,制造费时以及需要经常性维护等缺点,使得人们一直努力寻找能替代直流电动机调速的交流电动机调速。随着电力电子技术、PWM调制技术、计算机控制技术、交流电动机的控制技术的发展,交流调速系统由于其坚固耐用、运行可靠等众多优点,正在逐步取代以前直流调速系统,在传动领域占据主导地位。直到20世纪80年代中期,德国学者们在交流电机调速中提出了磁链轨迹控制的思想,在此基础上进一步发展产生了电压空间矢量脉宽调制(SVPWM)的概念。SVPWM又称磁链追踪型PWM法,它是从电动机的角度
2、出发,着眼于如何使电机获得圆磁场。本文首先介绍了种种交流调速技术,并逐一的分析其优缺点,然后重点详细的介绍了电压空间矢量脉宽调制(SVPWM)技术,就其如何使电机获得圆磁场进行了具体的分析和推导。并且推导出在MATLAB/SIMULINK环境下SVPWM控制信号的数学模型,并得到SVPWM控制下的电动机输出电流、电压、转速、转矩、磁链等信号的波形,经分析证实了异步电机在SVPWM控制下,具有启动电流小、转速稳定快、直流利用率高、能量损耗少、谐波少、控制简单等优点。I燕山大学本科生毕业设计(论文)A
3、bstractAstheDCmotorcomplex,manufacturingtimeandtheneedforregularmaintenanceshortcomings,sopeoplehavebeenlookingforanalternativetoDCmotorspeedcontrolofACmotorspeedcontrol.Withthepowerelectronics,PWMmodulationtechnology,computercontroltechnology,communi
4、cationtechnology,thedevelopmentofmotorcontrol,ACdrivesystembecauseofitsrugged,reliableoperationofthemanyadvantages,isgraduallyreplacingthepreviousDCdrivesystem,indriveoccupydominance.Untilthemid-1980s,theGermanscholarsproposedinthealternatingcurrentma
5、chinevelocitymodulationthefluxlinkagetrajectorycontrol'sthoughtthatbasedonthisfurtherdevelopedhashadthevoltagespacevectorpulse-durationmodulation(SVPWM)concept.SVPWMsaidthatthefluxlinkagetracingPWMlaw,itisfromelectricmotor'sangleembarking,howfocusesto
6、causetheelectricalmachinerytoobtainthecircularfield.ThispaperintroducesthevariousACvariablespeed,andtheanalysisoftheiradvantagesanddisadvantagesofeach,andthenfocusonadetaileddescriptionofthevoltagespacevectorpulsewidthmodulation(SVPWM)technique,onhowt
7、heygetroundthemotormagneticfieldanalysisandderivationofspecific.AndderivedintheMATLAB/SIMULINKenvironment,themathematicalmodelofSVPWMcontrolsignal,andgetSVPWMunderthecontrolofmotoroutputcurrent,voltage,speed,torque,fluxandotherwaveform,confirmedbythea
8、nalysisofinductionmotorunderthecontroloftheSVPWMwithastartcurrent,speedstabilityandquick,DChighefficiency,lowenergyloss,lessharmoniccontrolandsimple.III目录摘要IAbstractII第1章绪论11.1引言11.2交流调速的发展历程21.2.1三大核心技术的突破21.2.2三个发展阶段4第2章SVPWM调制原理和主电路设计102.1S