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In recent years, with the vigorous development of the automobile industry , led to the rapid development of the auto parts technology , LED with its small size , long life , low energy consumption , shock-resistant , fast start-up time , environmental protection and many other advantages has become a new generation of cars light source technology of choice . The ultimate goal is the application of LED in automotive lighting applications in the automotive headlamp . LED is a very temperature sensitive device , If the LED is not a good heat dissipation , the heat will continue to accumulate , leading the LED junction temperature rise , the LED junction temperature is too high causes the LED service life reducing , or even failure . LED headlamp heat problem is a bottleneck restricting the development of LED automotive headlamp , how high efficiency cooling technology , LED lamps can be successfully applied to become the key to the design of a car headlight . The papers on high-power LED headlamp heat did some research , and specific work are as follows : ( 1 ) through the analysis of the the nervous energy situation as well as the development of the automobile industry status quo on the significance of this research work , and the characteristics of the high-power LED high - power automotive headlamp heat situation at home and abroad were analyzed to determine the content and technical route of this research work . ( 2 ) sets of LED light-emitting principle , and in accordance with the high beam brightness requirements , estimate the number of LED 's use to determine the design of a parabolic reflector cavity , the use of three-dimensional design software PRO / E to design a high-power LED headlight model . (3 ) sets out the theoretical basis of the theory of thermodynamics and thermal analysis , LED lamp light source model and design has been simplified , and the the headlights light source simplified model is imported into the finite element analysis software ANSYS , finite element analysis software ANSYS thermal simulation analysis of the LED light source model , no heat sink fan cooling the LED light source model , the radiator cooling the LED light source model . (4 ) microcontroller according to the temperature of the chip design feedback circuit to control the cooling fans stop and turn , and the the feedback cooling technology used in high-power LED lights .
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