LED factory lights features and technical dismantling

- Aug 24, 2018-

LED factory lights features and technical dismantling

In the power consumption of the factory, lighting power accounts for a certain amount of energy consumption. For example, in the 30,000-square-meter factory, the lighting power is 300KW, so in the choice of LED factory lights, how to achieve energy-saving and environmental protection is the top priority of the factory designers. The use of new LED light source as the basic lighting fixture can not only achieve energy saving and environmental protection, but also has the advantages of long life, fast response time, and pure light color concentration. In recent years, it has been widely favored by consumers.

First, the key technology of LED factory lighting

As new technologies, new processes, and new materials continue to be applied to high-power LED light sources, they lay the foundation for high-power LED lamps. Because the products of LED light source applications vary greatly, their test design standards have a certain hysteresis, so the products produced by different manufacturers are poorly interchangeable in terms of structure and performance. At the same time, the LED lighting products themselves are a machine. The integration of factors such as light and electricity is related to the technology in many fields.

LED factory lights features and technical dismantling

Second, LED factory lamp design example

The design of the LED factory lamp involves more details. We analyze the discussion one by one according to the following important considerations to reflect the design process and method.

Power selection

Light source selection

Thermal design

Institutional design

optical design

Power selection

The traditional factory lamp is mostly 250W or 400W high pressure sodium lamp and metal halide lamp, which is more expensive and the performance life is not ideal. Now we can replace it with 100WLED factory lamp, and compare with the characteristics of the new LED lamp. The obvious difference.

2. Thermal design:

In high-power LEDs, heat dissipation is a big problem. For example, if a 10W white LED has a photoelectric conversion efficiency of 20%, 8W of electric energy is converted into thermal energy. If no heat dissipation measures are taken, the core temperature of the high-power LED will rise rapidly, when its junction temperature (TJ) When the temperature rises above the maximum allowable temperature (typically 150 ° C), high power LEDs may be damaged by overheating. Therefore, the heat dissipation design is also our most important content. Below we combine the aluminum substrate and the heat sink to discuss the heat dissipation design.

3. Substrate selection

In LED product applications, it is often desirable to assemble multiple LED light sources onto a circuit substrate. In addition to playing the role of the LED module structure, on the other hand, as the LED output power is getting higher and higher, the substrate must also play the role of heat dissipation to transmit the heat generated by the LED crystal, so in the material selection. Must meet structural strength and heat dissipation requirements. For the substrate, we compared FR4, ceramic substrate and MCPCB.

(1) FR4 thermal conductivity is about 0.36W/m.K, which cannot meet the heat dissipation requirements of high-power LED lighting;

(2) Ceramic thermal conductivity is greater than 80W/m.K, expensive, poor processability, and cannot be used in large areas;

(3) The thermal conductivity of MCPCB is greater than 2.0W/m.K, the price is moderate, the processability is strong, and the technology is mature and can be mass-produced.

4. Radiator design

The function of the heat sink is to absorb the heat transferred from the substrate or the chip, and then radiate to the external environment to ensure the temperature of the LED chip is normal. Most radiators are designed for natural convection and forced convection. Active heat sinks and passive heat sinks.

Lesterlighting is a professional LED lighting manufacturer, mainly producing high-beam lights, LED garden lights, LED factory lights, LED solar street lights and other LED lighting, your preferred LED light supplier.