自适应PI控制的太阳能LED照明系统PWM恒流控制器  

Research on Controller of PWM Constant Current Based on Adaptive PI Control for Photovoltaic LED Lighting System

作　　者：韦和平 

机构地区：[1]西安交通局,陕西西安710032

出　　处：《现代电子技术》2009年第11期116-118,124,共4页Modern Electronics Technique

摘　　要：以PIC单片机为控制核心,提出一种基于自校正PI控制器的太阳能LED照明系统的PWM恒流控制的设计方案。该方案较好地实现了输出电压的自适应控制,即蓄电池电压足够时实现恒流控制,而当蓄电池电压较低时实现非恒流控制。同时样机实验也验证了方案的正确性,目的在于提高LED阵列工作的可靠性,并延长其使用寿命,其创新之处是将单片机、变流控制技术以及太阳能结合起来。Using a PIC single chip as core device,a new type of design method is presented based on self- tunning PI controller for a PWM constant current control of photovoltaic LED lighting system. The adaptive control of output voltage is proposed preferably,realizing constant current control while the battery voltage is sufficient and non- constant current control while the battery voltage is low comparatively. The designing correctness is verified by the experiment prototype. Aim is to improve reliability of LED arraies and prolong using time. It＇s the first time to realize contacting single chip and deflation with solar energy.

关 键 词：太阳电池 自校正 温度补偿 恒流 脉宽调制 

分 类 号：TP29[自动化与计算机技术—检测技术与自动化装置]