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智能式LED太阳能路灯控制器的设计

2015-04-13肖海明陈立章小印

现代电子技术 2015年1期

肖海明 陈立 章小印

摘 要: 太阳能LED路灯照明系统采用市电互补方式,对推广太阳能 LED 路灯的应用有着现实和经济意义。为了实现太阳能LED路灯的市电互补控制,设计了一种市电互补LED太阳能路灯控制器。该控制器以ARM处理器为核心,通过对蓄电池电压、太阳能电池电压、环境温度等参数进行采样,进入ARM运算决策,可实现温度补偿修正的高准确控制,且具备蓄电池选择功能及市电供电自动切换功能。该控制器应用于路灯改造,既可以减少一次性投资,又可以取得显著的节能减排效果。

关键词: 太阳能路灯; LED路灯; 市电互补; 控制器; ARM

中图分类号: TN710?34 文献标识码: A 文章编号: 1004?373X(2015)01?0153?04

Abstract: The mains complementary way using for solar LED street lamp lighting system has a practical and economic significance for the promotion application of solar LED street lamp. In order to realize the mains complementary control of solar LED street lamps, a controller for mains complementary LED solar street lamps was designed. ARM processor is taken as the controller′s core. Through sampling of solar battery voltage, battery voltage and environmental temperature, and ARM operational decision, high accurate control of temperature compensation can be achieved. It has the functions of battery selection and city power supply automatic switching. If the controller is applied to the street lamp system reconstruction, it can not only reduce the one?time investment, but also can achieve the obvious effect of energy saving and emission reduction.

Keywords: solar street lamp; LED lamp; mains supply complementation; controller; ARM

0 引 言

太阳能作为一种“取之不尽、用之不竭[1]”的绿色、清洁能源,正迅速得到广泛应用。LED具有体积小、坚固耐用、耗电量低、使用奉命长、环保、光色性能好等特点。太阳能电池输出的是直流电,而LED也是直流驱动光源,两者易于匹配,可获得很高的利用率,又降低成本,所以LED太阳能路灯越来越受到人们的重视[2]。

由于太阳能受天气因素的制约比较大,太阳光照射分布密度小,受光时间、强度大小具有随机性间歇性,要保证太阳能电池输出电压的稳定,就需要用蓄电池来储存电能,在白天有阳光时对蓄电池充电,晚上蓄电池给负载放电。若考虑连续阴雨天气,对蓄电池容量要求就更大,太阳能电池组容量就越大,成本也就越高。太阳能LED路灯照明系统采用市电互补方式可较好地解决这个矛盾,对推广太阳能 LED 路灯的应用有着现实和经济意义[3]。……

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