Reducing, by Pulse Width Modulation, the Curing Temperature of a Prototype High-power LED Light Curing Unit

<p>The high power consumption of conventional street lighting systems, and the consequences on environmental ecosystem due to continuous turning ON of light, have led researchers to seek solutions to this problem. LED light dimming system has been presented in many studies using computerized systems with or without wireless monitoring facility. The demerits of these systems include complexity, high cost and unfixed data transfer speed. This paper proposes to reduce power consumption of street lighting through a decentralized light dimming system that is based on Pulse Width Modulation (PWM). This is in addition to replacing conventional high power lamps with lower power LED lamps. The dimming control circuit of this system is fixed on each pole and controlled individually resulting in faster and more reliable response. The proposed system uses the available infrastructure and is suitable for small or main streets regardless of the number of light poles. It is also flexible in its coverage distance due to the freedom of motion detector selection. The advantages of using LED lighting on the environment as compared to conventional lighting are explained. Simulations reveal the effectiveness of the proposed system on energy saving and on the environment.</p>

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Developing LED light curing unit prototype by combined pulse width modulation: Ouput beam irradiance

2013 3rd International Conference on Instrumentation, Communications, Information Technology and Biomedical Engineering (ICICI-BME) ◽

10.1109/icici-bme.2013.6698544 ◽

2013 ◽

Author(s):

A. Sodri ◽

T. Handoyo ◽

DJ. Indrani

Keyword(s):

Pulse Width ◽

Pulse Width Modulation ◽

Led Light ◽

Light Curing

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Penerapan High Power LED (HPL) sebagai Penarik Datangnya Ikan Berbasis Mikrokontroler

Jurnal Sustainable Jurnal Hasil Penelitian dan Industri Terapan ◽

10.31629/sustainable.v9i1.2375 ◽

2020 ◽

Vol 9 (1) ◽

pp. 51-59

Author(s):

Sapta Nugraha ◽

Restu Alkhariti ◽

Tonny Suhendra

Keyword(s):

High Power ◽

Pulse Width ◽

Pulse Width Modulation ◽

Basic Material ◽

Fluorescent Lamp ◽

Water Turbidity ◽

Green Led ◽

High Power Led ◽

Arduino Uno ◽

Compact Fluorescent Lamp

Kelong is a rectangular-shaped house made of basic material is logs of various sizes that are bound square and below which are given drums to float. Based on the results of monitoring of fishermen on Bintan Island, fish gathered at a fishing distance by using white lights with a power of 2000 watts divided separately on four power lamps each of 500 watts. Currently fishermen choose to use this type of CFL (compact fluorescent lamp) lamp to attract fish's attention and because this type of lamp has an affordable price. In its application, the type of high power LED lamp with two colors, white and green, each is controlled based on water turbidity parameters with a percentage value of 0-33%, 34-66%, and 67-100%. PWM (Pulse Width Modulation) high power LED works with a percentage of 25% when turbidity <33%, percentage of 50% if turbidity> 33%, and percentage of 100% if turbidity ≥ 66%. The use of turbidity sensors that are connected to the Arduino uno is used as a control media that is equipped with an analog signal module to measure water turbidity. Based on its application the high power green LED produces 6 ounces and 2.5 ounces of high power white LED. Intisari Kelong adalah rumah berbentuk segi empat yang terbuat dari bahan dasarnya adalah kayu gelondongan berbagai ukuran yang diikat persegi empat dan di bawahnya diberi drum-drum untuk mengapung. Berdasarkan hasil pantauan pada nelayan di Pulau Bintan, ikan berkumpul pada jarak tangkap nelayan menggunakan lampu berwarna putih dengan daya sebesar 2000 watt yang dibagi terpisah pada empat buah lampu berdaya masing-masing sebesar 500 watt. Saat ini nelayan memilih menggunakan jenis lampu CFL (compact fluorescent lamp) untuk menarik perhatian ikan dan karena jenis lampu ini memiliki harga yang terjangkau. Pada penerapannya digunakan jenis lampu high power LED dengan dua warna yaitu putih dan hijau, masing – masing dikontrol berdasarkan parameter kekeruhan air dengan batasan nilai persentase 0-33%, 34-66%, dan 67-100% . PWM (Pulse Width Modulation) high power LED bekerja dengan persentase 25% apabila turbidity < 33%, persentase 50% apabila turbidity > 33%, dan persentase 100% apabila turbidity ≥ 66%. Penggunaan sensor turbidity yang dihubungkan dengan Arduino uno digunakan sebagai media pengendali yang sudah dilengkapi dengan modul sinyal analog untuk mengukur kekeruhan air. Berdasarkan penerapaanya high power LED warna hijau menghasilkan sebesar 6 ons dan high power LED warna putih 2,5 ons.

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

Applied Sciences ◽

10.3390/app11094035 ◽

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.

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