Homemade solar street light

Technical evidence (relating to the led street lamp 2) 1, isolated/non yangzhou street lamp manufacturers said: general isolation power supply made 15 w, such as in the LED street lamp power tube, the volume of transformer is very big, it is difficult to put into it. Basically see space structure depending on the specific situation,

technical disclosure (relating to the led street lamp 2) 1. Isolated/the street lamp manufacturers in shandong said: generally speaking, if the isolation power source is 15 w, and placed in the power of the led street lamp tube, the transformer is very large, it is difficult to place. Basically, between 0 + structure depends on the specific situation. In general, only 15 w can be isolated, rarely more than 15 w, and the price is very expensive. Therefore, isolation ratio is not high. In general, the isolation of the mainstream, the volume can be made smaller and minimum height of 8 mm. In fact, not isolation security measures are in place, there is no problem. Allow between empty, also can be used as isolation power supply. 2. How light-controlled led street lamp power and lamp bead board match? Some customers first design lamp panel, and look for the power supply, find it difficult to have a suitable power supply, voltage or current is too large and too small ( For example 7 x1wi & gt. 350 ma or v and below. 20V) ； Are either current is too small, or the voltage is too high, Such as the current and voltage; 200 ma or above; 25V) , leading to severe fever, low efficiency or insufficient input voltage range. In fact, if choose the best way of series-parallel connection, applied to each of the light emitting diode voltage and current is the same, and the effect of power supply can give full play to the best performance. Is the best way to communicate with power supply manufacturer first, and make the measurement. Or produces its own power supply. Not isolated input high voltage electrolytic capacitor selection and the same input, the choice of the output capacitor is 1 uf & lt6MA. Electrolytic capacitor of output adjustable light emitting diode power supply must meet 1 uf & lt0. 5MA . 3. Optically controlled led street lamp power supply board of series-parallel and wide voltage how wide it is? In order to make the led street lamp power supply work in the range of wide range input of solar energy street light budget pressure AC85 - 265 v, the light of the panel leds series-parallel way is very important. Try not to use, wide voltage divided into ac 220 v, ac 110 v classified as far as possible, to ensure the reliability of power supply. Due to the current power supply is usually isolation step-down constant current power supply, when need to 110 v, output voltage should be not more than 70 v, the number of series connection should not be more than 23. When the input voltage of 220 v, output voltage is 156 volts. In other words, a series of string of not more than 45. 4, led street lamp power cooling scheme is that the main factors in the hot condition, the led street lamp power supply bead can greatly prolong the service life. Usually use aluminum alloy, it is easier to heat dissipation. In other words, the led street lamp power supply bead paste on the aluminum substrate, heat dissipation area extending outward as much as possible. With such vast light-emitting diodes (leds) market, it is full of vitality. It mainly has the ability of scientific development and in some technology in a leading position. I believe that China's led enterprises will become more and more powerful. 5, why must be constant current led street lamp power supply? Characteristics of the led lighting material determine them much affected by the environment. For example, when the temperature changes, the light emitting diode current increases, when the voltage increases, the light emitting diode current will increase. In the rated power flow working long hours can greatly shorten the service life of led bulbs. Led constant current, however, is to ensure that the work current value as the change of environmental factors such as temperature and voltage.