Of the 21 pilot cities in the “Ten Cities, Ten Thousand Cities†in 2009, about 222,000 units of LED street lights (including tunnel lights) have been installed. Among them, Weifang 35,000, Chongqing 25,000, Wuhan 28,000 and Yangzhou 15,000. The sum of the lighting capacity of four cities is 103,000, accounting for nearly half of the total. Most cities in 2009 are still in the pilot phase of the project and are expected to be rolled out in large numbers in the coming years (from the high-tech LED). Global humanity must change the global warming effect, and energy conservation and emissions reductions are rising. The focus product "LED street lamp" which can be called energy-saving "long-life" project has become the "darling" of the energy-saving lighting industry. But we must clearly understand that when everyone is promoting the long life of LED, ignore or avoid another key issue that determines the life of LED lamps: that is, the quality of LED driver power supply. At present, each lighting manufacturer has encountered many problems in the practical application of LEDs due to short-term power failures, faults, and other issues. Product quality accidents and high after-sale maintenance costs have caused huge losses to manufacturers, and have also undermined consumer confidence in LED lighting products. . This has affected the development of the entire LED lighting industry. In this regard, the technical personnel in our industry have conducted a more detailed analysis of the key parts affecting the quality of the LED power supply for your reference! LED Power Supply Life: High Power LED 1W For the overall elegance of the power supply product structure, businesses often tightly design the power supply and the LED lamp body structure. The LED heat and the power supply heat cross infection, so that the power supply and LED light source are in a poor working environment, when the working environment When the temperature exceeds a certain temperature, the life of the components is greatly reduced. When the temperature is set inside the power supply, a flicker phenomenon will occur. If the temperature protection is not set, the lamp will die. The poor working environment will not be improved, resulting in a vicious cycle. The reputation of a company or the reliability of a product cannot be guaranteed. The life of the LED power supply depends mainly on the type of capacitor used by the power supply and the internal temperature of the power supply. Take the example of a well-known capacitance brand capacitor in Taiwan: Its universal -40-+105 degree specification capacitor life guarantee value is (under a full load condition of 105 degrees) 4000 hours. If we design the capacitor ripple current load value to use 85% of the maximum, the lifetime at the capacitor temperature of 65 degrees can only guarantee about 80,000 hours. The lifetime of the capacitor temperature of 75 degrees can only guarantee about 40,000 hours. The lifetime of the capacitor temperature of 85 degrees can only guarantee about 20,000 hours. The lifetime of the capacitor temperature of 95 degrees can only guarantee about 10,000 hours. From the above calculations, the life of the electrolytic capacitor will be reduced by half every 10 degrees. The operating temperature of the electrolytic capacitor: Power supply design better power device temperature rise in the 25-30 degrees, the design of the relatively poor temperature rise greater than 35 degrees, outdoor LED power supply requires waterproof, need to use a sealed shell, in order to increase the protection level requirements Processing, different colloidal materials, the price is not the same, cheap plastic high-temperature baking, often lead to components of varying degrees of invisible damage and tight bundles to leave hidden dangers. (The bad treatment also makes it easy for the temperature of the electrolytic capacitor in the housing to be the same as the temperature of some of the heat-generating devices.) The LED power supply (power over 60w) is usually installed in the same space as the LED. Since a large amount of heat generated by the LED itself depends on the heat dissipation of the housing, the temperature of the lamp housing rises by more than 20 degrees. In some areas, outdoor summertime outdoor surface components are also subject to significant changes in temperature, and certain vibration amplitudes can also cause damage and changes in parameters. Since LED lighting is an emerging industry, there is no industry standard that can be followed, so that lighting manufacturers need to think about how to connect LEDs in parallel when designing lamps. Actually, the light attenuation of LED lamps is not only a unilateral issue of heat dissipation and heat sinking. , And shunt wiring power supply methods and current impact on the chip has a great relationship. In the initial stage of the lighting design, the supporting problem of the power supply was not considered, and there was no communication and cooperation with the power supply manufacturers that could cooperate in the early stage of the design. But after the lamp LED substrate and structure design are completed, the problem of power supply is considered. For power supply manufacturers, the power supply parameters required for each lamp design are different. At this stage, the quantity of each batch of lamps and lanterns needs is very high. Less, usually only a few hundred to 1,000 units. Considering the R&D cost, it is impossible for power supply manufacturers to custom-design a different power supply for each vendor. Even with the design, high-power LED 1W. also requires a long period of time, and the cost of the product is also high. This caused the lamp manufacturers to find no suitable electrical/size power supply. The power supplies designed by the power supply manufacturers are in the state of small batches and the products cannot be mass-produced. Therefore, the versatility of the power supply interchangeability is the direction that everyone is trying to achieve. aims. In order to consider the compactness of lamps and lanterns in order to reduce the weight, many lighting companies are required to suffocate the compact size of the power supply and install the space. Some components use ceramic patches due to the limited space and their heat dissipation conditions are limited and the heat sink material is limited. Cross-infection is very unscientific. After the investigation, it was found that many companies created their own power-driven devices, which were mostly modeled on the limitations of professional technology. Often, the previous mistakes continued, and inexperienced manufacturers followed, leaving no innovation. In the industry, a small part of the power companies started to make electronic products. There is a certain amount of technology accumulation in the electronic technology. At present: The largest market share is Maoshuo's series of constant current and constant voltage LED high-power power supplies. In order to ensure the high reliability of the power supply and the long life of 50,000 hours, Maoshuo Power Supply uses 100% of electronic components of world-class brands. In particular, the power supply life of the short board ---- electrolytic capacitors, using the Japanese original, military-grade 105 °C, life expectancy of more than 10,000 hours; high reliability, high efficiency, long life characteristics come from 60% of the military power supply design , 30% of raw materials and 10% of manufacturing processes and first-rate testing laboratory equipment. The key is that the company’s leaders and technical staff visit first-line users to discuss the reasonable application of propagating power, different ways of combining and optimal wiring, and help their lighting design engineers come up with solutions. There are also a number of application customers are distributed more, such as the Northern Weifang of the Weaponry Industry Department using the military to do technical support, Delta, HuntKey and other LED application product power manufacturers also have a certain reputation. LED High Power 1W LED High Power LED Lamp Cup LED Lamp 5W LED Bulb LED Lighting Series LED Driver Series I have experienced lighting industry baptism for nearly 20 years. I am deeply concerned about the fact that many young LED lighting companies are not involved in the world. Objectively believe that the industry's 90% of outdoor lighting application product manufacturers' misunderstandings with the development of the industry, the employer's hard-earned savings will be disastrous. Many times and many power supply manufacturers and luminaire formwork design and technical personnel communication and many media appeals, advocated that the proposal from the street lighting needs to really recognize the true pedicle of outdoor lighting production. Corporate designers should study the essence of conventional lighting on the actual road surface. Today's LED street lighting is not only designed to illuminate roads with lighting levels below 10 degrees. High-power LED 1W. Business. Taking the modular design must be the direction of development of LED street lamps, and it is a small-scale integration of power supply and luminaire modules. This not only avoids many risks of high-power power supplies, but also components of low-power power supplies, especially electrolytic capacitors, can use ceramic capacitors. Sex is more secure and the key to modularity is to pass on after-sales services. Temperatures of up to 40 degrees or more, in harsh conditions, the working temperature of the capacitor will be greater than 95 degrees.