摘要
LED由于环保、寿命长、光电效率高等众多优点,近年来在各行业的应用得以快速发展,LED的驱动电源成了关注热点。理论上,LED的使用寿命在10万h以上,但在实际应用过程中,由于驱动电源的设计及驱动方式选择不当,使LED极易损坏。针对LED照明的恒流式电源,首先阐述了LED电源的基本工作原理,然后根据整体电路的基本架构,给出了整个的设计思路,主要介绍了电磁干扰(EMI)滤波器、有源功率因素校正(APFC)电路以及散热设计。最后,介绍了LED电源在生活中的应用以及今后设计需要解决的问题。
Because of pro-environment, longer lifetime, higher photoelectricity efficiency and numerous advantages, LED quickly develops in all walks of life. LED driving power becomes hot point. Theoretically, the service life of LED is more than 100,000 hours. However, during the actual application process, LED is easily damaged, due to inappropriate design of the driving power and driving way. The purpose of this paper is to aim at the constant current power of LED lighting to make it work efficiently and steadily. The primary work principle of LED power is briefly outlined, according to the basic structure of whole electric circuit, the whole design way is given. The design of EMI filter, active power factor correcting （APFC） electric circuit and heat elimination are analyzed in this paper in detail. Finally, the application of the LED power in daily life and some problems need to be solved in the future design are introduced.
出处
《能源研究与管理》
2011年第4期66-69,共4页
Energy Research and Management
关键词
LED
开关电源
恒流
电磁干扰
功率因素校正
散热
LED
switching power supply
constant current
electro magnetic interference
power factor correction
heatelimination
