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1、高亮度LED 节能灯具 项目介绍NETSECU INC原理简介随着LED 发光效率的提高，LED作为下一 代高效、节能、长寿命的光源照明产品已 经悄然进入市场，它基于半导体PN结形 成的发光器件，在一定正向偏置电压及注 入电流下，注入P区的空穴和注入N区的 电子在扩散至有源区后，经辐射复合而发 出光子，将电能转化为光能。产品技术要点高效LED照明产品的制作，必须要解决几个突 出的技术瓶颈： 1、单颗功率型LED发光通量 2、芯片发光远场分布所具有的朗波型角度分 布 3、在供电系统波动下，提供稳定的LED驱动电 路设计 4、散热系统设计及实施目前现状我们在美国硅谷已经研发20W、50W 、 12
2、0W的LED照明产品来替代目前普遍使用 的100W 室内外公共场合照明灯及250W 、 300W的高压钠路灯。实施了真正意义上的节能减排的“绿色照 明”产品技术评估1、节能效率 与现有的照明灯具比照（包括高压钠灯、等同光通 量），综合节能75 2、 产品寿命 5万小时以上，冷光源、低电压、弱电流、工程维 护费用低 3、 绿色环保 不含铅、汞等污染元素，光谱中没有紫外线、红 外线，没有光和热辐射，废弃物可回收 4、智能监控 在我们设计的驱动电路中，提供精准的恒流。功率 因数=0.9, 谐波失真=80 LM / W 采用美国CREE LED，可 参考北京“水立方”照明范例产品技术指标 输入电压：
3、85264VAC 全电压范围恒流 功率因数=0.9，谐波失真 80 LM / W CREE LED ， 20W 室内外照明灯 含 20X1W 80 LM / W CREE LED 散热器与灯壳一体化设计，散热表面温度小于 40度 使用环境广泛 2060度，环境湿度 095 ，抗震强度：6G产品应用范围LED可以应用于任何室内外照明场所 ，车站、码头、机场、隧道、商场、医院 、宾馆、酒店、学校、证券市场等。前景广泛，应用范围大。技术专利Quasi average current mode control Quasi Active Power Factor Correction Circuit f
4、or Switching Power Supply Three-Phase Resonant Boost Input AC-DC Converter Resonant Boost Input Single Stage AC-DC-AC Converter. Resonant ignitor for HID Lamp. Switching Power Supply AC-DC-AC converter Push-Pull Based Voltage Clamping Electronic Ballast Clamping Method for Forward Power Converters V
5、oltage Feed Push-Pull Resonant Push-Pull Inverter for LCD Backlighting A Short Circuit Detection Method for LCD Backlighting System Deep PWM Dimmable Voltage-Feed Resonant Push-Pull Inverter for LCD backlit with Couple Inductor Leakage Energy Recovering Method for Flyback Converters Dual Flyback Con
6、verter with Turn-Off Snubber Function Single Power Stage Forward Converter with PFC function 部分技术突破一HB LED driver ICs definition for Automotive, General Lighting Application Several DC/DC converter ICs for portable consumer application Several LED driver ICs for portable consumer application Technic
7、al Support IC controllers Application for Core converter and Auxiliary Converter of Desktop and Notebook Computer. ICs are ADP315X series, ADP317X series, and ADP316X series. These ICs cover Intel Spec VRM8.X, VRM9.X, VRD10. Switching power supply system for LCD flat Monitor. Flyback converter with
8、energy recover method plus LCD backlit inverter Voltage Feed Push-Pull Inverter for LCD Backlit Flat Monitor. PWM dimming method is adopted to obtain wide dimmable range and high efficiency 400W HID Lamp Electronics Dimming Ballast with PFC function. Full bridge type currnet source is generated to d
9、rive 400W Metal Hilde Lamp. Whole efficiency is 95% 70W HID Lamp Single Stage Electronics Ballast with PFC function. Resnant Boost input AC-DC converter is used to implement PFC function. Soft buck and resonant circuit are used to drive HID Lamp.部分技术突破二Two transistors ballast with PFC. Three cases o
10、f the lamp operation, preheating load, light load and normal load are considered. The frequency shift is used. (10)ZVT switching condition DC/AC inverter. Saturable reactors are adopted to set up ZVT soft switching condition for all switches of the inverter. Because the ZVT condition is set up separ
11、ately, it is possible to get good output quality in the same switching frequency. (11)ZVT switching condition HF off-line DC/AC inverter. A saturable reactor is adopted to help ZVT condition for all switches. The output of the HF converter is pulse-width modulated high frequency square wave. The squ
12、are wave can be isolated and transferred by high frequency transformer, and after rectifier, the required AC can be obtained. The circuit can be used as standby UPS and switching power amplifier. (12)Conductance model and analysis of a Boost-type (DCM) Power Factor Corrector. Set up suitable models
13、for Boost-type (DCM) PFC with and without second harmonic injected method. From the model, a linear control law can be set up to keep the THD value of input current less 5%. (13)Transmission-line transformer structure and property. Using its narrow-band filter property to get high frequency off-line
14、 DC/DC converter.部分技术突破三)Full bridge ZVT switching condition DC/DC converter. Non- linear magnetic material is adopted to set ZVT soft switching condition for all four switches. The converter has a wide load area in ZVT condition. The circuits are simple. It has been applied patent. (15)Single phase
15、 power factor corrector (DCM). Fourior technology is adopted. It is possible to make the THD value meet with the IEEE standard, that is, less than 5%. For boost circuit, the output voltage is 200 V DC for 110 V input AC. Due to DCM mold, the switching loss is low and the efficiency of the corrector
16、is high. (16)Three phase power factor corrector (DCM). High frequency switching transformer is adopted and only one switch is used to reduce and cancel harmonics to ensure the THD less than the requirement. Due to ZCS technology, the switching loss is rather low and the efficiency is high. (17)Three phase power factor corrector (CCM). A advanced power circuit is presented. It make the
