Sunfree Lighting Limited is a high-tech manufacturer specialized in R&D and production of solar led street light

The ten considerations of LED street light LED street light

by:SUNFREE     2021-02-05
The application of LED lights in now society, plays a decisive role to the progress of lighting engineering, especially the LED street lamp, energy saving and low carbon two aspects has made an important contribution to society, let's say in their daily use of LED street light should be paid attention to in the process of ten items. LED street lamp manufacturers of LED street lamp with conventional street lamps, the LED light source adopts low voltage dc power supply, by GaN power type synthetic efficiency white light, blue light leds and yellow is efficient, safe, energy-saving, environmental protection, long service life, fast response speed, high color rendering index of unique advantages, can be widely used in road. Housing available, resistance to high temperature of 135 degrees, low temperature resistant da 45 degrees. LED street lights maintenance costs low, compared with the traditional street light, LED street lights maintenance cost is extremely low, through the comparison, can recover all input costs less than 6 years. LED street light automatic control and energy saving device, can realize to meet the requirements of different times lighting cases, most likely to reduce the power, saves the electricity. Can realize the computer dimming, period and control, light control, temperature control, humanized functions such as automatic inspection. 1, LED street lamp power supply must be a constant current power supply. Characteristics of the LED street lamp lighting material determine its impact on the environment. For example, if the temperature changes, the LED current will increase. In addition, the LED voltage will increase. If long-term running more than rated current, the service life of LED lamp bead will be greatly reduced. LED constant current is also on the environmental factors such as temperature and voltage changes to ensure that the current value of their work. 2. LED street lamp power constant current precision of constant current power supply in the market is bad, the error of plus or minus 8%, constant current error is too large. General requirements for the plus or minus 3%. According to 3% of the design. Power must be after fine-tuning production can achieve the error of plus or minus 3%. 3, LED street lamp power supply voltage generally recommend working voltage of 3 leds. 03. 5V。 After the test, most of the work in 3. 2 v, so according to 3. 2 v calculation is reasonable. N the total voltage series lamp bead = 3. 2 * N。 4, LED street lamp power supply what is the most suitable working current? For example, the rated working current of the LED is 350 mAh. Some factories use it at the beginning and design 350 mA. In fact, work in this trend, the heat is very serious. After a lot of contrast test, 320 mA design is an ideal choice. 。 Minimize heat and more electrical energy can be converted to visible light. 5, LED street lamp power supply board series parallel with wide voltage to how wide? In order to make the LED street lamp power supply work in a wide range of input voltage AC85265V, LED lamp plate of the series parallel model is very important. Try not to use, wide voltage can be as much as possible into AC 220 V, 110 V AC, so as to ensure the reliability of power supply. Due to the current power supply is generally isolation step-down constant current power supply, when the voltage is 110 V, output voltage should be not more than 70 V, the serial number should not be more than 23 string. When the input voltage of 220 V, output voltage can be up to 156 V, the serial number is not more than 45. Number of parallel shoulds not be too large, otherwise the working current is too large, the power heating. There is a wide voltage, active power compensation of APFC is to use L 6561, 7527 or less to increase the voltage to 400 V, and buck, the equivalent of two switching power supply. This scheme only used under certain conditions. 6, isolated/not normally, if the isolation power source made from 15 w, it is placed in the LED street lamp power supply pipe. Transformer is big, not easy to put in. Mainly depends on the specific structure of the space, isolation can reach 15 w, is less than 15 w, and the price is very expensive. Therefore, isolation ratio is not high, generally not isolation more mainstream, the volume can be made smaller and the smallest can be as high as 8 mm, in fact, the isolation security measures have made it, there is no problem. Space also can be used in the isolation power.
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