摘要交流调压电路广泛应用于灯光控制及异步电机软启动，也用于异步电机调速。在供用电系统中，这种电路还用于对无功功率的连续调节。随着EDA技术的发展，许多电子产品的设计都采用了FPGA器件。在FPGA的设计中，由于VHDL语言具有很好的行为描述和系统描述性能、语言易读特征、层次化设计等优点而得到了广泛的应用。论文详细分析了晶闸管三相三线制调压电路的工作原理，给出了晶闸管的导通顺序和触发脉冲的规则。以实验室EDA/SOPC为实验开发平台，以FPGA芯片EP2C5Q208C8作为控制核心，设计了脉冲产生各个功能模块，得到了两种方案的顶层设计仿真模块电路，并对其进行了仿真验证。论文还设计了稳压电源、同步信号提取电路、输入输出隔离电路，搭建了单相半波实验验证电路，获得了不同触发角的脉冲波形和输出电压波形。仿真和实验结果表明了设计的合理性和正确性，所设计的电路能够实现连续调压的功能。关键词：FPGA，VHDL，晶闸管，触发角AbstractAcvoltageregulationcircuitarewidelyusedinlightingcontrolandasynchronousmotorsoftstart,alsousedforasynchronousmotorspeed.Inthepowersupplysystem,thiscircuitisalsousedinonreactivepowercontinuousadjustment.WiththedevelopmentofthetechnologyofEDA,manyelectronicproductdesignareadoptedFPGAdevice.InthedesignoftheFPGA,becauseVHDLlanguagehastheverygoodbehaviordescriptionandsystemperformance,easytoreaddescriptionlanguagecharacteristics,thehierarchicaldesignofadvantageandawiderangeofapplications.BasedonFPGAdesignEP2C5Q208C8chipascontrolchip,takingthree-phasesynchronousextractionsignaltotriggerthebenchmark,bychangingthethyristortriggertoexchangethepressureAngleofpurpose.TheexperimentalresultsshowthatusingtheFPGAchipcontrolthyristorconduction,whichiseasytocarryout,circuitstructurecompact,highcontrolaccuracyandstronganti-interferenceability,etc.KEYWORDS：FPGA，VHDL，thyristor，triggeringAngle目录第1章前言31.1三相调压器仿真电路设计的意义................................31.2系统的原理及功能............................................3第2章EDA∕SOPC实验开发平台的介绍..................................4第3章FPGA的介绍...................................................5第4章三相交流调压电路的触发原理...................................64.1晶闸管的工作原理............................................74.2晶闸管对触发电路的基本要求..................................74.3三相无中线调压电路的工作原理................................7第5章三相同步信号的提取...........................................85.1同步信号的初步提取..........................................85.1.1电压比较器的选取.......................................85.1.2直流稳压电源的设计.....................................85.2输出隔离的设计..............................................95.3同步提取电路的设计..........................................9第6章触发脉冲的FPGA设计.........................................106.1脉冲产生模块的设计.........................................106.1.1移相控制脉冲的选取....................................106.1.2单脉冲产生模块........................................106.2脉冲扩展模块的设计.........................................146.3脉冲分配模块的设计.........................................156.4脉冲调制模块的设计.........................................156.5时钟分频模块的设计.........................................156.6系统总体的设计.............................................16第7章实验结果及验证..............................................20致谢..............................................................22参考文献.............................
