基于MIC技术的LED照明供电系统设计

发布时间：2018-06-27 12:03

本文选题：LED驱动器 + MIC太阳能　；参考：《南昌航空大学》2014年硕士论文

【摘要】：目前，传统能源不仅储量日益减少，而且带来的污染问题也日益严重。要解决这一问题，可以从两方面入手：一方面，从能源的获取来看，太阳能、路面振动能量等新能源在日常生活中随处可见，具有无污染、可再生等优点。但是这些新能源受环境条件限制较大，存在能量密度低、电力供应不稳定、不连续等缺点，因此，能量收集装置的优劣直接决定了新能源的采集效率。另一方面，从能源在照明领域的利用来看，LED凭借节能、环保、光效强、寿命长、体积小、驱动电压低、无汞污染等优点，成为照明领域的发展趋势。但是LED要想充分发挥其在照明领域中的优势，必须借助于LED驱动电路。本文利用多输入直流变换器(MIC)技术，采用新能源联合供电方式，将太阳能和采集到的道路路面振动能量结合为LED供电。利用光伏电池收集太阳能在日常生活中能够经常见到，而由压电陶瓷阵列组成路面振动能量收集装置，来收集路面振动能量则比较新颖。因此，，本课题在系统结构上作了创新，除拥有太阳能收集装置之外，还增加收集道路路面振动能量的装置，与单纯的独立太阳能光伏供电系统相比，具有更多的能量获取渠道，提高了系统的能量采集效率。本文利用双输入Buck变换器将太阳能和路面振动能量整合存储入蓄电池中；采用Boost拓扑结构设计DC-DC变换器，作为由蓄电池为LED供电的驱动器；采用反激准谐振拓扑结构设计AC-DC变换器，作为由交流市电为LED供电的驱动器；并分别利用状态空间平均法和PWM开关等效电路法对以上两个LED驱动电路进行小信号分析，得到电路功率级传递函数，推导环路补偿电路参数。设计的能量管理电路包括路面振动能量收集电路、蓄电池充电电路、环境亮度检测电路和供电方式选择控制电路。本文设计制作了用于采集太阳能和路面振动能量的18W双输入Buck变换器、38W Boost LED驱动器和38W反激准谐振LED驱动器，其中两个LED驱动器的输出电压和输出电流均为54V/0.7A，确保LED能够正常工作，实验结果表明本课题所设计的LED供电系统具有较好的实用性，可以应用于现实生活中。
[Abstract]:At present, the traditional energy not only reduces the reserves day by day, but also brings the pollution problem day by day. To solve this problem, we can start from two aspects: on the one hand, from the point of view of energy acquisition, solar energy, road vibration energy and other new energy can be seen everywhere in daily life, with the advantages of non-pollution, renewable and so on. However, these new energy sources are limited by environmental conditions and have some disadvantages such as low energy density, unstable power supply and discontinuity. Therefore, the efficiency of new energy collection is directly determined by the merits and demerits of energy collection devices. On the other hand, with the advantages of energy saving, environmental protection, light efficiency, long life, small size, low driving voltage and no mercury pollution, LED has become the trend of lighting development. However, if LEDs want to give full play to their advantages in the field of lighting, they must rely on LED drive circuit. In this paper, the multi-input DC / DC converter (MIC) technology is used to combine solar energy with the collected vibration energy of road surface to provide LED power supply. The collection of solar energy by photovoltaic cells is often seen in daily life, but it is relatively new to collect the vibration energy of road surface by using piezoelectric ceramic array to collect the vibration energy of road surface. Therefore, the system structure of this project has been innovated. Besides solar energy collection device, it also increases the energy collection device for road surface vibration. Compared with the single solar photovoltaic power supply system, it has more energy acquisition channels. The energy collection efficiency of the system is improved. In this paper, dual-input Buck converter is used to integrate solar energy and road vibration energy into storage battery, boost topology is used to design DC-DC converter, which is used as driver for LED power supply by battery. A flyback quasi-resonant topology is used to design AC-DC converter, which is powered by AC power supply, and the state space averaging method and PWM switch equivalent circuit method are used to analyze the two LED drive circuits. The power level transfer function of the circuit is obtained and the circuit parameters of the loop compensation are derived. The designed energy management circuit includes road vibration energy collection circuit, battery charging circuit, environmental brightness detection circuit and power supply mode selection control circuit. In this paper, the 18W dual-input Buck converter and 38W boost LED driver and 38W flyback quasi-resonant LED driver are designed and fabricated for collecting solar energy and road vibration energy. The output voltage and output current of two LED drivers are both 54V / 0.7A to ensure that the LED can work properly. The experimental results show that the LED power supply system designed in this paper has good practicability and can be applied in real life.
【学位授予单位】：南昌航空大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM46

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