UE is a very fast-developing power supply manufacturer, Huawei, Lucent, UTStarcom, TCL Group, Inverter, Datang Telecom and VTech Group are all their customers. With the development of the LED industry, UE has also begun to enter the LED industry. The country's current implementation of the ten-city plan has led to the development of LED streetlights, but recently many LED streetlights have produced quality problems, adding some concerns to the promotion of LED streetlights. In this situation, we interviewed Lu Xin, regional manager of LED power supply manufacturer UE.
Eliminate the bottleneck of LED power supply life from the design
When talking about how to ensure the quality of LED power supply, Lu Xin said that the quality of the product should be considered from the design. The reliability of the LED street lamp power supply is mainly affected by the temperature. The excessive temperature makes the life of the internal electrolytic capacitor of the power supply lower, thus making the power supply very Fast failure. It can be said that electrolytic capacitors are the bottleneck restricting the life of LED power supplies. The LED chip and the power supply are installed together, and the space is generally small, and the heat dissipation is poor. The LED chip and the power source are both heating elements, so that the ambient temperature is high. Therefore, the life of the electrolytic capacitor can be prolonged by improving the heat dissipation condition of the LED street lamp system, improving the luminous efficiency of the LED, and improving the efficiency of the power supply.
In response to the above problems, the UE mainly reduces the heat generation of the power supply by increasing the efficiency of the power supply. And use the best components to ensure the quality of the power supply. In addition, we are developing the electroless capacitor LED street lamp power supply, which fundamentally eliminates the bottleneck that restricts the life of the LED power supply.
UE regional manager Lu Xin
Can not blindly pursue efficiency, LED power life is the key
In the requirements of LED street lamps, the efficiency of each watt of power is consumed. The efficiency of the power supply is only a part of the system. Blind pursuit of efficiency ignores the most important point. How to make the street lamp work well for 5 years. Even 10 years.
The energy-saving features of LED lighting systems are primarily determined by the LED chip and power supply. The LED chip itself has low energy consumption and is more than 75% energy efficient compared to incandescent lamps. The improvement of LED power efficiency can better show the high performance of LED light source. The low-efficiency LED power supply itself needs to consume a large amount of electric energy, and the power-saving characteristics of the LED cannot be highlighted in the process of supplying power to the LED. Therefore, the development of high efficiency LED power supply is an inevitable trend in the development of LED lighting systems, and is also the goal pursued by manufacturers.
Power factor correction (PFC) is generally required to meet harmonic and energy saving requirements. In general, for a given load power, the higher the power factor, the smaller the input current. But not all power supplies must be power factor corrected because the additional power factor correction circuitry also consumes power, which can make the overall power consumption higher. Moreover, in lighting applications, according to the European Union's International Electrotechnical Commission (IEC) regulations, LED lighting systems of less than 25 W do not require power correction, and if higher than 25 W, power factor correction (PFC) is required. In the United States, the Department of Energy's "Energy Star" project solid-state lighting standards have mandatory requirements for PFC, regardless of the power level, the power factor is higher than 0.7 for residential applications, and the power factor is required for commercial applications. Above 0.9. Therefore, whether the LED power supply requires power factor correction should be determined according to the specific user and cost.
LED street light power supply is a key development product
Lu Xin said that the current LED driver power supply developed by UE has a high efficiency of 94.7% and a power factor of 0.99, which has become a high level in the industry.
The power factor of 0.99 is sufficient to meet the power supply harmonic requirements. The efficiency of the power supply still has room for development, which depends on the development of the topology and high-performance components; at present, the life of the LED power supply is still difficult to reach 100,000 hours, and cannot match the life of the LED chip. Therefore, the characteristics of high efficiency, long life and high quality are the development trend of LED power supply, and also the focus of research.
To date, UE has developed a series of LED power supplies ranging from 3 to 300W, covering commercial store lighting, residential, office, workshop, landscape and street lighting applications. UE will continue to develop existing fields and focus on LED streetlight power supply as a fist product. We will enlarge and strengthen LED power supply from technological innovation and develop independent intellectual property rights.
LED lamps lack a unified standard customization mode as the main feature
LED is widely used in the field of lighting. In recent years, there is no uniform standard for the connection between LED chips and driving power. The power, voltage and current levels of LED lamps are varied, which determines that LED power supply cannot be unified. specification. In addition, LED luminaires have limited space and poor heat dissipation conditions, while the power consumption of the power supply affects the ambient temperature of the luminaire. Therefore, the design of the LED power supply needs to match the actual structure of the user's product, which results in a lot of LED power supply being customized, and the current customized operation mode will become the main market feature of the LED power supply.
Strengthening technological innovation to ensure that LED power products are in the leading position in the same industry
For the current LED power supply market, the product quality is uneven, the counterfeiting phenomenon is also very serious. The UE said that the primary task of the UE is to ensure the quality of the LED power supply products, focus on the development of high-end products, and establish a major customer as the main development goal. Long-term cooperation and strive for orders from municipal units. At the same time, strengthen technological innovation to ensure that LED power products are in the leading position in the same industry.
Apply for intellectual property rights in a timely manner, occupy relevant key technical fields, eliminate counterfeiting, and exclude competitors from entering. At present, the UE has obtained the authorization of 2 invention patents, 5 utility model patents and 29 design patents. In addition, six invention patents have been published.
UE's development strategy emphasizes technological innovation has always been at the forefront of LED power development
The LED lighting industry is becoming a key industry at present. The LED power supply market is becoming more and more fierce. The implementation of ENERGY STAR 5.0 and UL8750 LED lighting safety standards will help improve the reliability of LED power supply, improve the quality of the industry and promote the market. healthy growth. At the same time, strict standards inevitably lead to rising costs, and the increase in technical thresholds makes it difficult for some poor quality LED power products to enter the market.
UEs have always been at the forefront of power development, and technology has always been catching up with the current advanced level. Therefore, the introduction of these standards is both a challenge and an opportunity for the UE.
Regarding the future development of UE, Lu Xin said: Focus on technological innovation and enhance brand awareness. Cooperate with municipal units to establish a demonstration base for LED lighting applications and expand the influence within the industry. Expand sales channels, improve the marketing network system, and seize market share. Deploying patents in inventions, utility models, designs, new methods, new materials, etc., increasing intellectual property protection and raising the threshold for LED power supply to enter the market. (Edit: Looking up at the stars)
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