毕业设计67大功率铝氧化脉冲电源毕业设计说明书

I摘要在铝阳极氧化过程中，采用叠加直流成分的脉冲电源工艺，能使铝的表面生成坚硬的氧化膜，氧化膜有较好的抗腐蚀和抗磨损的能力，且裂纹少。由于在性能上的明显优点，叠加直流脉冲电源已经广泛用于铝氧化的生产工艺。工业生产中，首先要求电源要达到足够的输出功率，能长期稳定可靠地运行，并能对电压电流进行调节，脉冲的频率、通断比能调节修改，运行时间能方便地设定。在满足技术指标的情况下，操作尽可能简单方便，避免复杂的键盘操作。本设计包括主电路和控制电路两部分。主电路包括三相全控整流电路、滤波电路、斩波电路。控制电路采用凌阳16位单片机作为控制核心，调节占空比，频率，脉宽来调节输出电压。开关功率元件选用IGBT。关键词：脉冲电源；三相整流；斩波IIAbstractInthealuminumanodicoxidationprocess,usesthesuperimpositiondirectcomponentthepulsepowersourcecraft,canenablethealuminumthesurfaceproductionhardoxidefilm,theoxidefilmtohaveabettercorrosionresistanceandtheanti-attritionability,alsothecrackarefew.Becauseintheperformanceobviousmerit,thesuperimpositiondirectcurrentpulsepowersourcealreadywidelyusedinthealuminaproductioncraft.Intheindustrialproduction,firstrequeststhepowersourcetohavetoachievetheenoughoutput,canlong-termstablyreliablymove,andcancarryontheadjustmenttothevoltageelectriccurrent,thepulsefrequency,passesbreakstheratiotobeabletoadjustrevises,therunningtimecanconvenientlyestablish.Insatisfiesthetechnicalspecificationinthesituation,theoperationsimpleisasfaraspossibleconvenient,avoidsthecomplexkeyboardholdingThisdesignincludesmaincircuitandcontrolcircuittwoparts.Themaincircuitincludingthree-phaseallcontrolsthelevelingcircuit,thefiltercircuit,cutsthewaveelectriccircuit.Thecontrolcircuitusesinsultsthepositive16monolithicintegratedcircuitstotakethecontrolcore,theadjustmentoccupiesthespatialratio,thefrequency,andthepulsewidthadjuststheoutputvoltage.TheswitchpowerpartselectsIGBT.Keyword：Pulsepowersourc；Three-phaserectification；ChoppingIII目录第1章绪论...........................................................1第2章主电路设计.....................................................32.1整流电路........................................................42.2晶闸管的选择....................................................62.2.1闸管额定电压Vked............................................62.2.2晶闸管额定电流IT...........................................72.3中间滤波器设计..................................................82.4斩波电路的设计..................................................92.4.1直流斩波电路................................................92.5脉冲变压器：...................................................102.5.1作用：......................................................102.5.2特性：......................................................102.6IGBT的保护.....................................................102.6.1过电压保护..................................................102.7吸收电路参数计算...............................................132.7.1缓冲电容CS.................................................132.7.2缓冲电阻Rs................................................142.7.3缓冲二极...................................................142.8脉冲变压器的选择...............................................14第3章控制电路......................................................153.1IGBT驱动.......................................................153.1.1SCALE功能介绍..............................................153.1.2ＳＣＡＬＥ的特点...........................................163.1.3ＳＣＡＬＥ的主要功能.......................................163.1.3ＳＣＡＬＥ驱动块的保护功能.................................173.2ＳＣＡＬＥ的主要工作模式.......................................173.2.1直接模式...................................................173.2.2半桥模式...................................................183.3引脚功能.......................................................183.3.1输入部分引脚功能...........................................183.3.2输出部分引脚功能...........................................193.4小结...........................................................193.5TL494的特点与功能..............................................193.5.1TL494的特点与功能..........................................193.6晶闸管驱动.....................................................203.6.1晶闸管驱动信号要求.........................................203.6.2驱动电路设计...............................................20IV3.6.3防止误触发的措施...........................................213.7光电耦合器在电源技术中的应用...................................213.8过电流保护.....................................................223.8.1施密特触发器...............................................223.8.2霍耳电流传感器.............................................253.9过零点检测.....................................................263.10直流稳压电源..................................................28第4章软件设计......................................................294.1主程序流设计...................................................304.2外部中断程序...................................................304.3AD转换程序.....................................................304.4电压采样程序...................................................314.5晶闸管触发程序的设计...........................................314.6定时器中断程序流程图的设计.....................................324.7PID控制程序的设计.............................................324.7.1PID控制......................................................324.8程序流程图.....................................................37总结.................................................................42参考文献.............................................................43英文原文.................................