LED street lights meet the general direction of “energy saving and emission reduction” and have become the focus of attention of local governments. The Ministry of Science and Technology carried out the "Ten Cities and Ten Thousand Miles" LED lighting demonstration project, and Guangdong Province proposed the "Thousands of Miles" plan and so on. The Electronic Components Technology Network understands that while local governments are vigorously supporting LED streetlights, the quality of high-power LED driver power supplies has become a shortcoming that hinders the development of high-power LED lighting.
The conditions of use of indoor lighting and outdoor lighting are quite different, and the technical difficulty is also different. Power requirements for outdoor lighting:
1. High power, high efficiency requirements, and full lighting efficiency requirements per watt of lumens, street lighting requirements of more than 68lm / W
2. Directly related to the efficacy of the luminaire is the efficiency of the power supply, the power efficiency is high, and the overall lighting efficiency requirement is possible.
3. LED driving power supply for LED street lamps and tunnel lights, the power is generally 100W, 150W, 200W, 300W, and the cost accounts for 8% - 10% of the total lamp cost.
4. The greater the power of the LED driver, the more difficult it is to design and manufacture.
At the beginning of the promotion of high-power LED lighting such as LED street lights and tunnel lights, LED drive power has many problems, mainly because it is not designed according to the harsh environment where LED street lights and tunnel lights are located. The operating temperature range is narrow, only -40 ° C - 70 ° C Low waterproof rating; low lightning protection rating; low efficiency, long life, only 20,000 hours, or even 10,000 hours.
"The instability of LED driver power is an industry consensus, which has dragged the LED lighting industry down for 1 to 2 years," said Gu Yongde, chairman of Maoshuo Power. The poor reliability led to the installation of street lights today, and the power supply was broken in a few days. Outdoor high-rise installations such as street lights and tunnel lights are difficult to install and difficult to repair. For street lamp manufacturers, the unstable power supply makes the maintenance cost exceed the purchase price of the product itself.
Seeing the problem of high-power LED driver power supply, power supply manufacturers seize the opportunity to launch more reliable products to win the city Changmao Shuo established a research and development center in Hangzhou in 2006, hired experienced international power supply design experts to lead the development of LED street lights, Tunnel light drive power. In 2 years, it invested more than 25 million. In March 2008, it officially launched LED street lamp and tunnel lamp series power supply. The power covers 30W, 50W, 75W, 100W, 150W, 200W, 300W. In terms of reliability and longevity, the experience of Maoshuo is worth learning.
How to ensure reliability and longevity?
“The reliability of Maoshuo Power Supply is guaranteed by research and development design technology, accounting for 60%, raw materials accounting for 30%, and production process accounting for 10%. Moso Power has adopted US military power technology to ensure design reliability from the beginning.” Gu Yongde, chairman of the power supply, said. Most of the raw materials of Maoshuo Power Supply are imported. The IC is from Infineon Germany. The capacitors are all military-grade Japanese capacitors. Only the shell, lead and PCB are from local companies.
The power failure rate of Maoshuo is less than 5 parts per million, the efficiency is 95%, the temperature rise is small, the service life is over 50,000 hours, the warranty is 5 years, the waterproof level is up to Ip68 standard, and the lightning protection level is above 4KV.
How to guarantee the delivery date?
Since most of the raw materials come from imports, the preparation of raw materials largely depends on the length of delivery. The original ordering cycle was 8 weeks. Now, in order to solve the problem of long delivery time, Maoshuo has prepared 200,000 sets of materials in advance, and the advance payment is nearly 25 million yuan, in line with the booming demand for LED street lamps in the second half of the year.
Of course, such a strong capital is not available to every company. "The original delivery period is long, mainly because the material preparation cycle is long, and the delivery period has been shortened to 20 days," Gu Yongde said.
At present, there are nearly 500 customers in the country, and there are dozens of batches of products. The well-known customers include Qinshang Optoelectronics, Deshida Optoelectronics, Jiangsu Shifu Optoelectronics, and Nanjing Handerson. Products are used in the Pearl River Delta, Yangtze River Delta, Fujian, Shandong, Tianjin, Beijing, Shijiazhuang, Sichuan, Xinjiang and other places. Among them, Qinshang Optoelectronics 95% of LED street light power supply comes from Maoshuo, monthly supply of 8000--10000 sets, Maoshuo is Dalian Luming's power supplier. Shenzhen Longda Expressway has 4.5 kilometers of LED street lighting, which is a Maoshu 200W LED driver.
About cost reduction
The large amount of raw materials imported from Maoshuo LED drive power makes the product cost relatively high. At present, Maoshuo has been researching technology to reduce costs, investing 12 million yuan to establish a reliability laboratory with Peking University Graduate School, and pass reliability test in LED drive power supply. After the shipments are large, look for alternative raw materials to reduce costs. "It is very cautious to choose a cheap replacement component. After all, reliability is the first priority," said Gu Yongde.
The current sales volume of Maoshuo is about 500 million yuan. It is expected to grow by 50% in 2009, and R&D investment will be 5% of sales, which may reach 8% this year. Moso's current LED drive power capacity is 10,000 units / day. The new production line in Shenzhen is about to be put into use, and the 50,000 square meters of land purchased by Huizhou Boluo is about to start construction. year 2010. Moso prepares the IPO, and the funds raised will also be used for the R&D and manufacturing of LED driver power.
Conclusion:
Electronic Components Technology Network believes that the prospect of LED lighting is not doubtful. LED street lights and tunnel lights will be the first to be promoted by the government's demonstration projects. The LED driver power supply will be a huge market, but this market is too big for a supplier to eat. Moso Power has improved the reliability of LED driver power supply and quickly occupied the market. This kind of practice is worthy of reference by peers. It is worthy of study by power engineers and worthy of attention from LED streetlight companies.
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