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中文摘要：
依据太阳运动轨迹,设计了一种利用太阳能的LED自动照明系统。提出一种定时阳光跟踪方法,结合新颖的最大功率点跟踪（MPPT）技术,使光伏电池工作在最佳状态,并具有蓄电池过充、过放保护;通过对大功率HBLED的恒流驱动,提高了LED照明光的利用率,降低了功耗。实验结果表明：系统运行稳定,提高了太阳能的利用效率,有效的节约电能。
英文摘要：
In the paper,a kind of automatic LED lighting system which was made use of solar power was designed according to the orbit of the sun.A timing of the sun tracking method combined with the novel maximum power point tracking technology was proposed to make photovoltaic cells work in the best condition,and it had over-charging and over-discharging protection.Through the steady current driving of large power HBLED,the utilization ratio of luminous flux of LED was raised,and the power loss was cut down.The results of the experiments show that the developed system works stably,and the utilization of solar energy is increased,saving the energy effectively.
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