In recent years, with the continuous development of LED lamp packaging technology and heat dissipation technology, the stability of LED lamps has reached a relatively good level. Light attenuation and color drift mainly occur in the products of some copycat manufacturers. The main reason is due to unreasonable heat dissipation design. Relatively speaking The problem of the LED light driver power supply is much more serious and is the main cause of dead lights or flickering. In other words, the LED light driver Power supply has become a shortcoming of the quality of LED lights. According to the wooden barrel theory, the life of the LED light driving power supply is the life of the LED light life.
Conventional lighting street lamps have separate lamp holders and power supplies. The lamp holder that usually fails is the high-pressure sodium lamp. High-pressure sodium lamp national The standard stipulates a one-year warranty period. Street lamp management units will stock a certain number of sodium lamps. High-pressure sodium lamps have mature national standards. Accurate, its main accessories, size, power and other main parameters are unified and interchangeable. At present, the main fault of LED lights is the power supply, so the main problem is to solve the power supply problem. Since the current LED power supply is still In the absence of a mandatory unified standard, the power supplies on the market are fragmented, with single-channel, multi-channel, and different sizes, making them difficult to replace. along with With the emergence of ultra-high-power LED street lights and LED tunnel lights on the market, LED drive power supplies frequently fail. In addition, LED street light drivers Most power supplies adopt built-in designs, which often makes it difficult to maintain LED light power supplies. In addition, some manufacturers lack after-sales maintenance services. As a result, owners complained, and after exaggerated publicity by the media, the public misunderstood LED lights, which affected the reputation of the LED industry.
1.Give up more than 4 outputs and develop single or two outputs. Give up large current and ultra-large current and develop small current. The more output channels there are, the more complex it is. The current interference between different outlets is very costly to solve. If not solved, the failure rate will be high. higher. In addition, the more output channels, the greater the total output current, and current is the main cause of heating, and the voltage itself is not directly Directly leads to heat. Simply put, the heat is proportional to the square of the current. That is to say, if the current increases to twice the original, The calorific value will increase to 4 times, the current will increase to 3 times, and the calorific value will increase to 9 times. To sum up, only The failure rate of LED lamp power supply with one or two outputs will be greatly reduced.
2.Intelligent control is one of the advantages of LED lamps, and power supply is the key to intelligent control. Intelligent control has the most mature conditions and the most obvious effects in the application of LED street lights and LED tunnel lights. Intelligent control can be used in various situations. At the same time, the power of lamps can be controlled steplessly according to the traffic density on the road, which not only meets the application requirements, but also achieves huge The energy-saving effect can save a lot of money for highway authorities. The application in tunnel lighting can not only save energy, but also Automatically adjust the brightness of the tunnel entrance and exit according to the brightness outside the tunnel, providing the driver with a visual transition stage to ensure that driving Driving safely.
3.Give up high power and ultra-high power, and choose small and medium power power supplies with higher stability. Because the greater the power, the greater the heat, and the components inside are more compact, which is not conducive to heat dissipation, and the temperature is exactly what the power source generates. The main culprit of the malfunction. Furthermore, low-power power supplies are relatively mature and have advantages in terms of stability and cost. potential. In fact, many high-power power supply solutions have not been verified by time and proven in practice. They are all projects launched in a hurry. It is an experimental product, so failures are common. In contrast, small and medium power power supplies have developed earlier and their technical solutions need to be mature. many.
4.Heat dissipation and protection are the main external factors of power failure. Not only the power supply itself will generate heat, but the lamps will also generate heat. How to dissipate these two heat sources reasonably is a key part of the lamp design project. The issue that engineers must consider is to prevent excessive concentration of heat, forming a heat island effect and affecting the life of the power supply. Use separation A power supply solution is a good choice.
5.Feasibility of maintenance. Power failure problems cannot be completely avoided, so Chengdu Chaoyue Optoelectronics proposed the principle of simplicity in maintenance. Only the power supply Only when the replacement of the light source is as simple as that of conventional lighting can the user be happy. Even if the power supply is broken, the user will be happy. The mood will not be too bad, and the mood of users determines the fate of LED lamp manufacturers.
6.Protective performance. Protection issues are also very important. The penetration of moisture may cause a short circuit of the power supply, and the dust on the casing will affect the heat dissipation of the power supply. Exposure to the sun can easily cause high temperatures and aging of wires and other components. Judging from actual experience, the rotary wiring plug The failure rate is relatively high, most of which are caused by water leakage.
7. Modular design. Modular design has become today’s trend. We must find ways to integrate modular power supplies. If the power supply can be plugged and unplugged, Solving maintenance problems in this way will definitely be welcomed by users. At the same time, interface standardization needs to be established to allow different manufacturers to LED light power supplies can be used universally.