数字式直流开关稳压电源（A题）2017年5月1日I/20摘要关键字：BUCK同步整流，PID，蓝牙通讯，电源管理APP摘要：本系统是基于BUCK同步整流拓扑结构，以STM32为控制核心，蓝牙传输与手机端APP相配合，从而形成了整个无线数字式开关电源。手机APP开启电源，STM32通过电压采样将采集到的数据送入PID算法进行处理后，实时动态调整输出的PWM的占空比，进而实现可控稳压。同时可通过手机APP端设置输出电压和上限电流，并实时显示当前电压和电流值，当电流超过设定值时，手机端会语音报警，并点亮APP中的过流指示灯，并立即关断电压。Keywords:BUCKsynchronousrectifier,PID,Bluetoothcommunication,powermanagementAPPAbstract:thissystemisbasedontheBUCKsynchronousrectifiertopology,withSTM32asthecontrolcore,theBluetoothtransmissionandmobilephoneendAPPmatch,thusformingtheentirewirelessdigitalswitchingpowersupply.First,themobilephoneAPPtoopenthepowersupply,STM32throughthevoltagesamplingwillbecollectedintothePIDalgorithmfordataprocessing,real-timedynamicadjustmentoftheoutputofthePWMdutycycle,andthusachievearegulatedvoltage.AtthesametimethroughthemobilephoneterminalAPPtosettheoutputvoltageandcurrentlimit,anddisplaythecurrentvoltageandcurrentvalue,whenthecurrentexceedsthesetvalue,themobilephoneterminalcanvoicealarm,andlightinAPPflowindicator,andimmediatelyturnoffvoltage.II/20目录1系统方案...................................................................11.1DC-DC结构的论证与选择...............................................................................................11.2MOS管驱动电路的论证与选择.......................................................................................11.3电压采样电路的论证与选择.............................................................................................11.4电流采样电路的论证与选择.............................................................................................11.5控制系统的论证与选择.....................................................................................................21.6无线模块的论证与选择.....................................................................................................22.1BUCK电路的分析..........................................................................................................22.1.1占空比.....................................................................................................................22.1.2电感.........................................................................................................................22.1.3电容.........................................................................................................................22.2驱动电路的计算................................................................................................................32.2.1自举电容的选取.....................................................................................................32.2.2自举二极管的选取.................................................................................................32.3电流采样电路的计算........................................................................................................33电路与程序设计.............................................................43.1电路的设计.........................................................................................................................43.1.1系统总体框图......................................................
