What's the quality of the solar garden lamp?
LED street lamp, power supply, heat dissipationThe main factor of the heat dissipation scheme is that the power supply beads of LED street lamp can be greatly extended under the condition of no overheating. Generally, aluminum alloy is easier to be cooled by heat dissipation. That is, LED street light, power beads attached to the aluminum substrate, as far as possible to expand the external heat dissipation area.The face of such a broad LED market is full of vitality, the main scientific development, in a number of technical areas to achieve a leading position, I believe that China's LED enterprises will become more powerful.
Power supply efficiency of LED street lampThe input power minus the output power value of this parameter is particularly important, the greater the value of efficiency is low, it means that there is a large part of the input power is converted into heat emitted; if it is installed in the lamp will produce a very high temperature, a light effect of our LED plus than the heat that will produce higher temperature superposition.And all of our internal power electronic component life will decrease with the increase in temperature. So the efficiency is the most fundamental factor power life, efficiency is too low, otherwise the heat consumption in the power supply is too large. Non isolation efficiency is higher than the isolation type, generally more than 80% on it, but the efficiency and the light plate matching method related
LED series parallel connection and PFC power factorElectronic components work within the rated voltage range, the smaller the current, the longer the heating life, and the shorter the life expectancy. LED street light power beads are sensitive to AC volume, and the higher the AC volume, the worse the light comfort.Generally use electrolytic capacitor to maintain the voltage, as much as possible to reduce the output voltage, AC volume, the bottom pressure, electrolytic capacitor capacity can not be too small, capacity and output current ratio of 1UF<1.5MA, otherwise LED will appear flashing. Non isolated input terminal, high voltage electrolytic capacitor, the choice is the same as isolated, and the output capacitor is 1UF<6MA. Dimmable LED power supply at the output terminal electrolytic capacitor to meet 1UF<0.5MA.
