Summary:
In recent years, the development of LED lamp packaging technology and heat dissipation technology, the stability of LED lamps has reached a relatively good level, the occurrence of light decay and color drift is mainly the products of those cottage manufacturers, the main reason is the unreasonable heat dissipation design. Relatively speaking, the problem of LED light driving power supply is much more serious, which is the main cause of dead light or flashing. That is to say, LED light driving power supply has become a short board of LED light quality. According to wooden barrel theory, LED light driving power supply The life expectancy is the life of the LED light.
Conventional lighting streetlights are separated from the power supply. Generally, the lamp heads are high-pressure sodium lamps. The national standard for high-pressure sodium lamps stipulates that the warranty period is one year. The street lamp management unit will store a certain number of sodium lamps. The high-pressure sodium lamps have mature national standards. The main parameters such as the size and power of the main components are uniform and interchangeable.
The current LED lamp failure is mainly in the power supply, so the main problem is to solve the power problem. Due to the current lack of mandatory unified standards for LED power supplies, the power supplies on the market are separate, single-channel, multi-channel, and of different sizes, which is difficult to replace. With the emergence of super-power LED street lights and LED tunnel lights on the market, LED drive power failures frequently occur, and LED street light drive power supplies often use built-in design, which often causes difficulties in maintenance of LED light power supply, and some manufacturers lack after-sales maintenance services. The complaints of the owners have caused the public to misunderstand the LED lights after the exaggerated publicity of the media, which has affected the reputation of the LED industry.
Experience 1: Give up 4 or more outputs, develop single or two outputs, abandon large currents and large currents, and develop small currents.
The more the number of output channels is more complicated, the current interference between different outlets is solved, and the cost is high. If not solved, the failure rate is high. In addition, the more the number of output channels, the larger the total output current, and the current is the main cause of heat generation. The voltage itself does not directly cause heat. Simply speaking, the heat is proportional to the square of the current, that is, the current increases to the original. 2 times, the heat will increase to 4 times, the current will increase to 3 times, and the heat will increase to 9 times. In summary, the single- or two-output LED lamp power failure rate will be much lower.
Experience 2: Give up high power, super power, and choose medium and small power supplies with higher stability.
Because the greater the power, the greater the heat, the more compact the components inside, which is not conducive to heat dissipation, and the temperature is the culprit of power failure. Moreover, the low-power power supply is relatively mature in development, and has advantages in terms of stability and cost. In fact, many high-power power solutions have not been time-tested and proven in practice. They are all rushed projects, all of which are experimental products, so the faults are endless. In contrast, small and medium-sized power supplies have matured due to their earlier development.
Experience 3: Intelligent control is one of the advantages of LED lamps, and power is the key to intelligent control.
Intelligent control is the most mature condition in LED street light and LED tunnel light lighting application. Intelligent control can realize stepless control of lamp power according to road traffic density in different time periods, which not only meets application requirements, but also realizes huge energy saving. The effect can save a lot of money for the highway supervisory unit. The application in tunnel lighting not only saves energy, but also automatically adjusts the brightness of the tunnel entrance and exit according to the brightness outside the tunnel, providing the driver with a visual over-stage to ensure driving safety.
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