Summary:In today's increasingly tense energy environment, saving energy is the responsibility of each of us. In response to the call for energy conservation a
In today's increasingly tense energy environment, saving energy is the responsibility of each of us. In response to the call for energy conservation and emission reduction, many street lamp manufacturers have replaced traditional high-pressure sodium lamps with more energy-efficient LED street lamps in urban street lamp renovation projects. However, the quality level of LED street lights on the market is uneven, and the phenomenon of LED street lights in many places will not light up tomorrow. The root cause of this phenomenon is the poor heat dissipation performance of LED street lamps.
When the heat dissipation performance is poor, the internal temperature of the LED lamp will be too high. As the temperature of the LED increases, its junction resistance decreases, resulting in a decrease in the on-voltage. Under the same voltage conditions, the increase in the internal temperature of the LED lamp will cause the LED current to increase. The increase in current will further increase the temperature, which will lead to a vicious cycle that will burn the LED chip. Moreover, the internal temperature of the LED street lamp is too high, which also aggravates the light decay of the LED chip, which will lead to the phenomenon of bright but not bright soon. So what is the reason for the poor heat dissipation performance of LED street lights?
1. The quality of LED street lights
The LED chip used has poor thermal conductivity, and the temperature of the LED die cannot be transferred to the surface (heat inside and cool outside). Even if a radiator is added, all the internal heat cannot be dissipated. Secondly, some LED street lamps do not have a radiator inside. .
2. Temperature rise caused by LED street light power supply
The quality of the LED street light power supply is not good. When the LED is turned on, the non-linearity of the power supply and the weak change of the power supply will cause the current through the LED chip to increase, which will cause the internal temperature to be too high and affect the heat dissipation performance of the LED street light.
To sum up, the main reason for the poor heat dissipation performance of LED street lamps is the quality of LED chips and driving power. Therefore, for our buyers, when purchasing LED street lights, we must emphasize the choice of high-quality LED chips and power supplies with street light manufacturers, and we should not be greedy for cheapness. After all, high-quality products will definitely not be cheap. If it is very cheap, then There is a problem.