Several important analytical skills | technology industry LED street lamp industry dynamic | lighting: the rural solar LED street lamp manufacturers

For the LED street lamp believe that everybody is not strange, but how much knowledge about the LED street lamp technology you know, today let lighting well count about the LED street lamp several important techniques in the industry. 1. Power isolated with the normally if isolation is 15 w power to make it, then put in the LED street lamp power tube, will find it of the transformer is too big, lead to put very difficult. But mainly depends on the spatial structure of the specific circumstances, in general the isolation will only do 15 w, almost never a 15 w, and the price is high. Isolation, therefore, price is low, the mainstream is isolation, small size, the minimum can go to 8 mm high, and the isolation problem doesn't exist after completes the safety measures. Also, of course, if the local permits can be isolated power supply. 2. How to do to make the LED street lamp power supply and match the lamp bead board many will do light board, again to find the need of power, it will be found difficult or not suitable power supply, or small voltage, or current is too large, For example 7 x1wi & gt; 350 ma, or V< 20V） ; Furthermore is high voltage, small current ( For example: I< 200 ma or v> 25 v) , resulting in excess heat, inefficient, or insufficient input voltage range, etc. Actually find a good way of series-parallel, add to each LED on the current voltage are basically the same, it also can play the effect of the power supply to the best. Of course, the best approach is to communicate with power supply manufacturers to discuss first, tailored or their production power. 3. PFC power factor and LED the AC220V high-voltage isolation type series-parallel industry input end of the electrolytic capacitor capacity with the input power 1 w = 1 uf commonly, uf AC110V * 1 w = 2. Now in the market power of PFC, there are three, respectively is 1. Is not to bring a PFC without a dedicated circuit power factor compensation, usually PF value will be 0. About 65; 2. PFC circuit is passive power factor compensation, usually we call it the passive power factor compensation lamp, also called by flow circuit board is currently in use range and reliability are the best, the PF value in 0. About 92; 3. Active active 7527/6561 circuit is used to do, that is what we call the active power factor compensation, called APFC circuit AC220V, AC110V can be used with the capacity of the electrolytic capacitor, choose 1 w = 1. 5UF。 PF value can reach 0. 99, but the solution more expensive than the second scheme to double the cost of reliability of slightly, so the second scheme with more. For passive type PFC circuit is also called valley type PFC circuit, the dc working voltage range is half the peak of the ac input voltage. If input is 220 v, the peak is 220 * 1. Half of the 414 = 312 v, peak voltage is 156 v, on the basis of the isolation type wave output for upper not half wave. So the LED street lamp power supply under 45 series the maximum number of bead series is advisable. Therefore, to get larger power factor, lamp bead serial number cannot be too little, or to reach the best working state, on the isolation type power supply serial number is related to how much vice winding circle number, must meet to do the power of output power. Electronic components work in the rated voltage range the smaller working current heating bottom life longer and longer, otherwise life will be shorter. LED street lamp power supply bead is sensitive to exchange quantity, exchange quantity more highlight line comfort is more poor. Generally want to maintain the electrolytic capacitor voltage, as far as possible to reduce the output voltage of ac, end of pressure electrolytic capacitor capacity is too small, capacity and output current ratio is 1 uf '1. 5 ma, otherwise the LED will be flashing. The isolation type input selection and isolation type high voltage electrolytic capacitor, output capacitor option 1 uf '6 ma. That move light LED power supply the 1 uf electrolytic capacitor at the output end to be 0. 5MA。 4. The input power - tell me about the LED street lamp power supply efficiency Output power parameters is very important, the value is inversely proportional big efficiency low phenomenon, that is to say, the input power is most of them are converted into heat; If installed in the lamp inside will produce very high temperatures, coupled with the LED luminous efficiency than give off heat, the temperature of the stacking is horrible. And all power within the life of the electronic parts will shorten with the rise of temperature. So decided to service life of power supply is the most fundamental factor of productivity, efficiency is not too low, or use on the power supply of heat will too. 5. LED street lamp power supply cooling requirements cooling scheme is the main factor of LED street lamp power supply bead used under the condition of no overheating can greatly extend life, generally with aluminium alloy, easier to heat dissipation. Is the LED street lamp power supply bead on the aluminum substrate, an external cooling area as far as possible. In the face of such a vast LED market is full of vitality, mainly to the development of science, can take the lead on a few technical field, believe our LED enterprises will be more powerful.