基于STM32单片机控制的可控硅调节设计

Design of Silicon Controlled Rectifier Based on STM32 Microcontroller

基于功率器件晶闸管的单相交流电压控制器,常用于小功率单相电动机控制、照明控制和电加热控制等场合。基于电源一体化方案,选取了STM32F407作为主控制器设计了可控硅调节器,通过获取外部输入信号或检测信号反馈,按设定方式调节PWM触发信号控制可控硅导通时间,实现小型功率器件的输出调节。以光线调节为例设计了单片机控制的可控硅调光设备,实现光线的自动调节、手动调节以及感光调节等功能。最后搭建了基于单片机控制的光线调节实验系统,进行了相关的测试与分析,结果表明,所设计方案能够根据输入信号或检测结果触发不同的导通角,实现光线的强弱控制。所设计方案可应用于光线调节、电机闭环调速等多种控制场景。并可用于光耦过零检测、不控整流、稳压降压以及光线检测反馈控制等电子技术知识的综合实验普及,以及程序编写、中断、外设及PWM等单片机知识的学习。所提方案不受功率器件和场所限制,可有效降低成本。

Single-phase AC voltage controller based on power device thyristor is commonly used in small power single-phase motor control,lighting control and electric heating control.Based on the power supply integration scheme,STM32F407 is selected as the main controller,and by acquiring external input signal or detecting signal feedback,PWM trigger signal is adjusted according to the setting mode to control the conduction time of silicon controlled rectifier(SCR),so as to realize the output regulation of power device.Taking the light adjustment as an example,the SCR light adjustment equipment controlled by microcontroller is designed to realize the functions of light automatic adjustment,manual adjustment and photosensitive adjustment.Finally,the experimental system of light adjustment based on single-chip microcomputer control is built,and the relevant test and analysis are carried out.The results show that the design scheme can trigger different conduction angles according to the input signals or detection results,so as to realize the control of light intensity.The design scheme can be applied to various control scenarios such as light regulation and motor closed-loop speed regulation.It can be used for the comprehensive experimental learning of electronic technology knowledge such as optocoupler zero crossing detection,uncontrolled rectification,voltage stabilization and step-down,and light detection feedback control,as well as the learning of program writing,interruption,peripheral equipment,PWM and other single-chip microcomputer knowledge.The proposed scheme is not limited by power devices and places,which can effectively reduce costs.