基于单片机的Buck型变换器控制 电气工程专业VIP专享VIP免费

基于单片机的Buck型变换器控制ControlofBuckConverterBasedonSingle-chipMicrocomputer摘要：对于电子产品而言，必不可少的供电电源，随着人们对电子产品的安全性能要求越来越高，变相的对供电电源提出了新的机遇和挑战。Buck型变换器控制的研究一直是该领域重要的一方面，对于直流斩波电路而言，研究最多是压斩波电路。本文研究了一种基于单片机STM32F10ZET6的Buck型变换器控制，由主回路、控制回路以及超前滞后校正器三方面组成，控制回路用于输出指定的频率和占空比的数字PWM脉冲波；主回路主要涉及电阻、电容以及电感的性能参数的选择；超前滞后校正器主要用于使稳定输出电压的作用。设计了闭环状态下的五种补偿方式进行补偿，通过对仿真图的比较分析，选择双零三极补偿；最后通过对Buck电路的闭环仿真，闭环控制的稳压作用很好的满足设计要求。关键词：STM32；Buck型变换器；数字PWM；ThebuckconvertercontrolbasedonSingle-chipMicrocomputerAbstract：Forelectronicproducts,theessentialpowersupply,withtheincreasingdemandforthesafetyperformanceofelectronicproducts,raisesnewopportunitiesandchallengesforthepowersupplyindisguisedform.TheresearchonthecontroloftypeBuckconverterisalwaysanimportantaspectofthisfield.FortheDCchoppercircuit,thevoltagechoppingcircuitisthemoststudied.ThispaperstudiesaBuckconverterMCUcontrolbasedonSTM32F10ZET6,controlcircuitandleadlagcorrectorthree,usedtospecifytheoutputfrequencyanddutyratioofthepulsewavedigitalPWMcontrolcircuit;themaincircuitmainlyrelatestotheresistance,capacitanceandinductanceparametersselection;leadlagcorrectormainlyusedforthestableoutputvoltageeffect.Thedesignofthefivekindsofcompensationundertheconditionofclosedloopcompensation,throughacomparativeanalysisofthesimulationmap,finallythroughtheclosedloopsimulationofBuckcircuit,meetthedesignrequirementsandstabilizingeffectofclosed-loopcontrolofthegood.Keywords:STM32;Buckconverter;digitalPWM;目录第1章绪论...............................................11.1引言.........................................................11.2研究现状.....................................................21.3研究目的及意义...............................................31.4研究的主要内容...............................................4第2章Buck变换器的设计原理....................................62.1Buck变换器基本工作原理......................................62.2Buck变换器的调制方法........................................62.2.1PWM调制模式...........................................72.2.2PFM调制模式...........................................72.3Buck变换器的控制模式........................................82.4闭环控制原理.................................................82.4.1降压斩波电路工作原理...................................92.4.2超前—滞后校正器原理..................................10第3章基于STM32的PWM发生器的设计...........................113.1主控单片机的选型...........................................113.2程序设计...................................................113.3硬件设计....................................................113.3.1电源电路..............................................113.3.2复位电路..............................................123.3.3JTAG下载电路.........................................13第4章Buck变换器的控制系统的设计............................144.1Buck变换器主电路设计.......................................144.2Buck变换器闭环控制的参数设计..............................164.2.1Gvd(s)的传递函数分析..................................164.2.2补偿环节Gc(s)的设计...