大功率LED路燈驅(qū)動電路設(shè)計及散熱分析
發(fā)布時間：2018-11-04 17:48
【摘要】：作為新型的半導(dǎo)體照明器件,LED具有節(jié)能環(huán)保、壽命長、無污染、色彩豐富等優(yōu)點,使其在醫(yī)療、車用、景觀和道路照明等方面發(fā)展迅速。制約大功率LED路燈發(fā)展的主要因素是其散熱問題,本文設(shè)計了一款200W大功率LED路燈驅(qū)動,并對其進行了合理的熱設(shè)計,同時通過熱仿真研究其各元件的工作環(huán)境溫度及驅(qū)動電路的溫度分布,最后對MOSFET的散熱器進行了優(yōu)化設(shè)計 本文在給出了大功率LED路燈選題背景,介紹了LED的優(yōu)點及LED路燈的發(fā)展現(xiàn)狀及趨勢后,闡述了LED驅(qū)動的設(shè)計要求及設(shè)計重點,由于大功率LED路燈的發(fā)熱量較大,因此在進行LED路燈設(shè)計時需著重考慮大功率LED驅(qū)動的熱設(shè)計,保證室外溫度變化及自發(fā)熱對驅(qū)動電路壽命及可靠性的影響最小。 其次本文給出了200W大功率LED路燈驅(qū)動電路的設(shè)計,采用NCP1607作為驅(qū)動的控制IC,產(chǎn)生PWM波控制MOSFET,并對電路進行功率因數(shù)校正。為滿足隔離降壓的目的,選擇正激式變換器作為主電路拓撲,同時電路的設(shè)計還包括浪涌保護、EMI濾波電路、穩(wěn)壓電路以及輸出反饋的設(shè)計等。 由于LED的壽命和亮度都與溫度有關(guān),因此熱設(shè)計時LED路燈驅(qū)動設(shè)計的重點。在給出了大功率LED路燈驅(qū)動熱設(shè)計的要求和注意事項后,分析對比了幾種散熱方式。本文的散熱設(shè)計主要集中在元件選型和散熱方式的選擇兩方面。 論文最后,通過Flotherm軟件對基于NCP1607的大功率正激LED驅(qū)動電源進行了散熱仿真,驗證散熱器對于大功率LED路燈驅(qū)動散熱的必要性和有效性,仿真的數(shù)據(jù)結(jié)果顯示散熱器能有效地降低LED驅(qū)動的工作溫度,同時對熱源處的散熱器進行了優(yōu)化,對比優(yōu)化前后的溫度數(shù)據(jù)可以看出,MOSFET的結(jié)溫和工作溫度得到了進一步的降低。
[Abstract]:As a new type of semiconductor lighting device, LED has the advantages of energy saving, environmental protection, long life, no pollution, rich color and so on, which makes it develop rapidly in medical, vehicle, landscape and road lighting. The main factor restricting the development of high power LED street lamp is its heat dissipation. A 200W high power LED street lamp driver is designed in this paper, and a reasonable thermal design is carried out. At the same time, the working environment temperature of each component and the temperature distribution of driving circuit are studied by thermal simulation. Finally, the optimization design of MOSFET radiator is carried out. In this paper, the background of high power LED street lamp is given. After introducing the advantages of LED and the development status and trend of LED street lamp, the design requirements and key points of LED drive are expounded. Because of the high power LED street lamp, the heat output is larger. Therefore, the thermal design of high power LED drive should be taken into account in the design of LED street lamp, and the influence of outdoor temperature change and self-heating on the life and reliability of the drive circuit should be minimized. Secondly, the design of 200W high power LED street lamp driving circuit is given. The NCP1607 is used as the driver to generate PWM wave to control MOSFET, and power factor correction is carried out. In order to satisfy the purpose of isolating and lowering voltage, forward converter is chosen as the main circuit topology. The circuit design also includes surge protection, EMI filter circuit, voltage stabilizer circuit and output feedback design. Because the lifetime and brightness of LED are related to temperature, the emphasis of LED streetlight drive design is thermal design. In this paper, the requirements and points for attention of high power LED street lamp driving heat design are given, and several heat dissipation modes are analyzed and compared. The design of heat dissipation in this paper mainly focuses on the selection of components and the selection of heat dissipation mode. Finally, the heat dissipation simulation of high power forward LED driving power supply based on NCP1607 is carried out by Flotherm software, and the necessity and effectiveness of radiator for high power LED street lamp driving heat dissipation are verified. The simulation results show that the radiator can effectively reduce the working temperature driven by LED. At the same time, the radiator at the heat source is optimized. By comparing the temperature data before and after the optimization, it can be seen, The junction temperature of MOSFET is further reduced.
【學(xué)位授予單位】：大連理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TM923.34
本文編號：2310671
[Abstract]:As a new type of semiconductor lighting device, LED has the advantages of energy saving, environmental protection, long life, no pollution, rich color and so on, which makes it develop rapidly in medical, vehicle, landscape and road lighting. The main factor restricting the development of high power LED street lamp is its heat dissipation. A 200W high power LED street lamp driver is designed in this paper, and a reasonable thermal design is carried out. At the same time, the working environment temperature of each component and the temperature distribution of driving circuit are studied by thermal simulation. Finally, the optimization design of MOSFET radiator is carried out. In this paper, the background of high power LED street lamp is given. After introducing the advantages of LED and the development status and trend of LED street lamp, the design requirements and key points of LED drive are expounded. Because of the high power LED street lamp, the heat output is larger. Therefore, the thermal design of high power LED drive should be taken into account in the design of LED street lamp, and the influence of outdoor temperature change and self-heating on the life and reliability of the drive circuit should be minimized. Secondly, the design of 200W high power LED street lamp driving circuit is given. The NCP1607 is used as the driver to generate PWM wave to control MOSFET, and power factor correction is carried out. In order to satisfy the purpose of isolating and lowering voltage, forward converter is chosen as the main circuit topology. The circuit design also includes surge protection, EMI filter circuit, voltage stabilizer circuit and output feedback design. Because the lifetime and brightness of LED are related to temperature, the emphasis of LED streetlight drive design is thermal design. In this paper, the requirements and points for attention of high power LED street lamp driving heat design are given, and several heat dissipation modes are analyzed and compared. The design of heat dissipation in this paper mainly focuses on the selection of components and the selection of heat dissipation mode. Finally, the heat dissipation simulation of high power forward LED driving power supply based on NCP1607 is carried out by Flotherm software, and the necessity and effectiveness of radiator for high power LED street lamp driving heat dissipation are verified. The simulation results show that the radiator can effectively reduce the working temperature driven by LED. At the same time, the radiator at the heat source is optimized. By comparing the temperature data before and after the optimization, it can be seen, The junction temperature of MOSFET is further reduced.
【學(xué)位授予單位】：大連理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TM923.34
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，本文編號：2310671
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