基于LED的高開間燈具設計技巧

　　雖然住宅照明的固態(tài)照明成為頭條新聞，商業(yè)和工業(yè)高灣照明應用程序獨特的優(yōu)勢，利用LED的好處。高灣照明由天花板安裝的燈具設計，用來照亮離燈具15至25英尺的表面。使用高灣照明環(huán)境遠遠超出了倉庫和工廠車間到包括公共場所，如機場大廳、體育場館和雜貨店。通常，設備每天運行24小時，因此，無論是在運營成本還是減少停機時間方面，LED都可以節(jié)省大量開支。為了開發(fā)利用這些特性的燈具，照明設計者不僅需要選擇合適的發(fā)射器，他們還必須采取系統(tǒng)級的方法來解決LED驅動的挑戰(zhàn)，比如驅動程序設計和熱管理。

　　1DesignLights聯(lián)盟建立了以下規(guī)格為非住宅固定裝置。

　　Table 1： Lighting specifications for non-residential fixtures.

　　Design challenges

　　High-bay lighting presents a number of challenges to designers. The high output lumen specification requires large arrays of LEDs， which can generate a significant amount of heat. Driver topologies must be able to handle hundreds of devices while remaining lightweight， economical， and as efficient as possible. Located up against the ceiling， often near HVAC ducting， fixtures can be subjected to higher than normal ambient temperatures with very little room for convective cooling to take place. In addition， many facilities have very specific requirements for light distribution， which can necessitate beam-shaping components.