Since the start of the Ten Cities Wanhao Project, LED street lights have been installed everywhere. According to the statistics of the High-tech LED Industry Research Center (LIRC), in 2009, a total of 222,000 street lamps were installed in 21 cities nationwide, and the installed capacity is expected to reach 1.5 million in the next three years. With such a large-scale installation, the quality of LED street lights has become the focus of attention in the industry. The challenges faced by current LED street light power sources include the life of key components in high temperature environments, how to achieve higher conversion efficiency and reduce heat dissipation, how to achieve high efficiency dimming, and to ensure constant color characteristics when brightness changes. It is reported that the LED street lamp power supply independently researched by Maoshuo Power has solved this problem almost perfectly.
      LED power supply is a key factor affecting the quality of LED street lights, and the maintenance cost of LED street lights is relatively high. The power supply is generally in the lamp head of the street lamp. The truck is needed for maintenance, and the manual maintenance cost is relatively high, so the reliability of the power supply is very high. In order to ensure the quality of the power supply, Maoshuo has implemented strict quality management.
      In terms of product design, Maoshuo strictly controls every aspect of product development in accordance with the “Development Process Management Procedures†and “New Product Project Development Management†formulated by the company. “First we evaluate the market, develop a product development strategy, and then conduct internal company technology research, followed by new product project feasibility study, preliminary design, detailed design, engineering prototype, small batch trial production, product optimization, and second test. Production, etc., we are all in accordance with a strict process." Mao Shuo Power Chairman Gu Yongde said.
      The current electronic components market is fiercely competitive, and the quality of products is uneven. Some manufacturers have relaxed the requirements for component quality in order to reduce costs. In order to ensure the quality of the power supply, Maoshuo electrolytic capacitors, drive ICs, magnetic devices, power semiconductor devices, etc. have adopted world-renowned brands, standard production requirements, and checks the material procurement level. “The most important thing is the company's strict quality verification and testing procedures. We invested more than 15 million to establish a verification center in cooperation with Peking University. All newly developed products must undergo strict stress analysis, EVT, SVT, DVT and other tests. MTBF calculation and experimental verification, and then will enter the production process." Gu Dong said.
      LED street lights are used outdoors, the environment is harsh, and the requirements for waterproof and lightning protection are very high. The temperature difference in China is very large. In the south, the external temperature is sometimes 40-50 °C, while in the north, it is likely to reach negative 20-30 °C. In order to cope with different environments, “Maoshu Power Supply regulates the starting temperature of the power supply to -40°C~70°C. The unique PFC circuit and internal shielding structure ensure that there is no problem in starting in any harsh environment.†Gu Dong Said. Through more than half a year of continuous research on the potting process, they formulated the best sealing ratio and the best heat dissipation of the potting glue, so that the product “drip not enter†and drive the power supply to prevent the radar from above 4KV.
      "In terms of component design and use, we have enough component design margin. The basic usage of the components we choose in the circuit can account for about 50% to 60% of the component itself, and some of the key components are relatively more. To be full." Gu Dong said.
      According to the LIRC survey, at present, in the domestic LED street lamp power supply market, the market share of Maoshuo Power is far ahead of other competitors, and its products have already entered Taiwan and foreign markets.
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