scholarly journals Pelatihan Reparasi Peralatan Elektronik Rumah Tangga (Lampu Penerangan LED)

2020 ◽  
Vol 2 (3) ◽  
pp. 192
Author(s):  
Hikmatul Amri ◽  
Stephan Stephan
Keyword(s):  
High Power ◽  
Lower Class ◽  
Fire Damage ◽  
Led Light ◽  
Surface Mount ◽  
The Public ◽  
Fluorescent Lamps ◽  
High Power Led ◽  
The Times ◽  
Led Lights

Salah satu peralatan elektronika yang paling banyak digunakan oleh masyarakat adalah lampu penerangan. Lampu penerangan rumah dan bangunan memngalami perkembangan yang cukup mulai dari lampu bohlam atau pijar, lampu fluorescent/TL, lampu halogen, lampu LED. Lampu LED sampai saat ini telah mengalami perkembangan LED dual inline package (DIP), LED surface mount device (SMD), HPL (high power LED), dan COB (chip on board). Rangkaian elektronika pada lampu jenis LED hanya terdiri dari 2 bagian yaitu: rangkaian driver dan rangkaian LED yang disusun secara seri. Kerusakan lampu LED paling banyak terjadi pada rangkaian driver dimana ada kerusakan paling ringan yaitu ada komponen yang terbakar sampai kerusakan terparah yaitu seluruh rangkaian yang terbakar. Metoda yang dilaksanakan adalah dengan memberikan pelatihan perbaikan/reparasi lampu jenis LED bagi usaha perbaikan/service peralatan elektronika yang dikelola oleh pemuda RT.05/RW.03 Desa Buruk Bakul. Tahapan yang dilaksanakan adalah memberikan materi komponen yang ada pada lampu LED, memberikan materi tentang komponen yang paling sering terjadi kerusakan pada lampu LED, memberikan praktik cara penggunaan alat ukur analog dan digital, memberikan praktik cara mengecek bagian yang rusak, praktik cara mengganti komponen yang rusa dan tahap melakukan finishing dengan menguji coba terhadap lampu LED yang sudah diperbaiki. Target service ini adalah lampu LED yang ada di sekitar Desa Buruk Bakul dan desa lain yang ingin memperbaiki lampu LED terutama dengan daya yang besar (15-45 watt) karena harga belinya cukup mahal. Dengan mengimplementasikan usaha ini langsung kepada masyarakat maka akan membutuhkan 7-7 orang tenaga kerja, sehingga mampu menambah penghasilan khususnya pada masyarakat kelas bawah di RT.05/RW. 03 Desa Buruk Bakul. One of the main electronics used by the public are light bulbs used for lighting. Household and building lighting has undergone an evolution through the times, starting from light bulbs, fluorescent lamps, halogen lamps, and finally LED lights. The development of LED lights created LED with dual inline package (DIP), LED surface mount device (SMD), HPL (high power LED), and COB (chip on board). The electronical network of LED lights consists of 2 parts, namely the driver network and the LED network that are arranged in a series. LED lights usually breakdown due to damage in the driver network. The lightest damage usually involves fire damage to its components and the heaviest damage usually involves fire damage to the whole network. The methods used involve giving LED lights reparations training to electronics repair stores that are run by youths in RT.05/RW.03 Buruk Bakul Village. The training consists of giving materials regarding components in an LED light, the most vurnurable components in an LED light, practice in the use of analog and digital gauges, practice in the process of checking for damages, practice in substituting damaged parts, and the finishing step of testing the repaired LED unit. The main target of these repairs are the LEDs that are in Buruk Bakul Village and other surounding villages that need LED repairs, especially LEDs with large wattage (15-45 watt) due to their fairly high prices. With the direct implementation of our program, we need 7 workers, in order to increase the income, especially for the lower class of RT.05/RW.03 Buruk Bakul Village.

scholarly journals Analysis on High-Power Seaport LED Luminaire with Uniform Light Distribution Based on Optimized Lens and Heatsink

2021 ◽  
Vol 11 (9) ◽  
pp. 4035
Author(s):  
Jinsheon Kim ◽  
Jeungmo Kang ◽  
Woojin Jang
Keyword(s):  
Light Source ◽  
High Power ◽  
Heat Dissipation ◽  
Light Emitting Diode ◽  
Light Distribution ◽  
Light Sources ◽  
Led Light ◽  
High Power Led ◽  
Distribution Requirement ◽  
Lighting Application

In the case of light-emitting diode (LED) seaport luminaires, they should be designed in consideration of glare, average illuminance, and overall uniformity. Although it is possible to implement light distribution through auxiliary devices such as reflectors, it means increasing the weight and size of the luminaire, which reduces the feasibility. Considering the special environment of seaport luminaires, which are installed at a height of 30 m or more, it is necessary to reduce the weight of the device, facilitate replacement, and secure a light source with a long life. In this paper, an optimized lens design was investigated to provide uniform light distribution to meet the requirement in the seaport lighting application. Four types of lens were designed and fabricated to verify the uniform light distribution requirement for the seaport lighting application. Using numerical analysis, we optimized the lens that provides the required minimum overall uniformity for the seaport lighting application. A theoretical analysis for the heatsink structure and shape were conducted to reduce the heat from the high-power LED light sources up to 250 W. As a result of these analyses on the heat dissipation characteristics of the high-power LED light source used in the LED seaport luminaire, the heatsink with hexagonal-shape fins shows the best heat dissipation effect. Finally, a prototype LED seaport luminaire with an optimized lens and heat sink was fabricated and tested in a real seaport environment. The light distribution characteristics of this prototype LED seaport luminaire were compared with a commercial high-pressure sodium luminaire and metal halide luminaire.

scholarly journals Lifetime prediction of a multi-chip high-power LED light source based on artificial neural networks

2019 ◽  
Vol 12 ◽  
pp. 361-367 ◽  
Author(s):  
Hongwei Liu ◽  
Dandan Yu ◽  
Pingjuan Niu ◽  
Zanyun Zhang ◽  
Kai Guo ◽  
...  
Keyword(s):  
Neural Networks ◽  
Artificial Neural Networks ◽  
Light Source ◽  
High Power ◽  
Lifetime Prediction ◽  
Led Light ◽  
High Power Led ◽  
Artificial Neural

Thermal Design of Automotive Headlamp with High Power LED

2013 ◽  
Vol 457-458 ◽  
pp. 649-654
Author(s):  
Jing Wang ◽  
Yi Xi Cai ◽  
Chun Zhang ◽  
Xin Jie Zhao ◽  
Xiao Hua Li ◽  
...  
Keyword(s):  
High Power ◽  
Heat Dissipation ◽  
Thermal Design ◽  
Fluorescent Lamps ◽  
Beam System ◽  
Cooling Devices ◽  
High Power Led ◽  
Led Headlamp ◽  
Volume Method

With an urgent need for energy conservation and pollution reduction, the trend of replacing traditional incandescent or fluorescent lamps with high-power LEDs is growing more and more popular. However, heat dissipation of high-power LED is the main bottleneck for its application. In this research, a kind of automotive headlamp low beam system model is designed with high power LED chips. Several different cooling devices are designed for headlamp cooling, the heat dissipation performances are simulated and analyzed both by the finite volume method (FVM) in FloEFD and experimental measurements. The obtained results indicate that loop heat pipe combined with fined heat sink is the most effective way for heat dissipation in the designed automotive low beam system, even in 80¡æ environmental temperature can ensure the LED headlamp system working stability. The research lays a theoretical basis for the follow-up study.

Transparent Ceramics Enabling High Luminous Flux and Efficacy for the Next-Generation High-Power LED Light

2019 ◽  
Vol 11 (24) ◽  
pp. 21697-21701 ◽  
Author(s):  
Yongfu Liu ◽  
Shuang Liu ◽  
Peng Sun ◽  
Yuanbao Du ◽  
Sheng Lin ◽  
...  
Keyword(s):  
High Power ◽  
Luminous Flux ◽  
Transparent Ceramics ◽  
Next Generation ◽  
Led Light ◽  
High Power Led

Effect of Temperature and Current on Luminous Efficiency of High Power LED

2011 ◽  
Vol 347-353 ◽  
pp. 310-313 ◽  
Author(s):  
Feng Rao ◽  
Zhi Chen Ge ◽  
Jin Lian Zhu
Keyword(s):  
Energy Saving ◽  
White Light ◽  
High Power ◽  
Light Emitting Diode ◽  
Luminous Efficiency ◽  
Effect Of Temperature ◽  
Light Emitting ◽  
Led Light ◽  
High Power Led ◽  
Changing Rate

Luminous efficiency of high power white light LED (light emitting diode) at different temperature and driver current is measured with the photometric, chromatic and electric characteristics analyzer. It is shown that the luminous efficiency decreases as the temperature and (or) the driver current increases. The highter the driver current is, the more strongly temperature worsens the efficiency. However, the changing rate of efficiency with current is similar at different temperature. At last, a luminous efficiency model with temperature and current is constructed. This research is very important for the design of energy-saving LED lamps.

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