汽车HID前照灯高压启动电路及控制策略

汽车HID前照灯瞬间快速启动需要13kV～25kV的高压,为了减小电路体积,本文提出了三倍压整流电路和能量压缩的高压启劝电路。在启动阶段加入启动方向随机选择程序,缓解了电极过快烧损,延长了HID前照灯的使用寿命,启动后引入低频电流积分控制方法,保证了可靠的辉弧过渡,自动适应不同的启动条件和老化程度。     

车载电子镇流器故障诊断电路的设计与研究

市场上的车载前照灯HID灯电子镇流器一般无故障诊断功能,给维修和整车故障诊断带来麻烦.针对这一现象,提出了一种具有较高的可靠性和实用性,且成本低廉的故障诊断电路设计方案.该方案软件部分用来诊断故障的类型,即无故障,输入过压或欠压,输入过流,HID灯过流或过压,硬件部分根据故障的类型给出不同的输出直流电压电平.经PSPICE仿真分析和样灯测试表明,其电平最大误差控制在2.5％范围内,方便了维修和整车故障诊断.     

35 W集成控制型HID镇流器的设计

设计了一种基于集成芯片控制的HID灯镇流器。该镇流器集成了对恒功率、电流采样、温度补偿、斜坡补偿部分的控制,同时改进了采样电路,有效提高了调制信号的占空比。镇流器电路拓扑结构简单,降低了成本,效率达到80.3%,可靠性高,无声谐振现象。     

RFID中整流电路的研究

设计并实现了一种倍压整流电路,通过倍压整流电路和半波整流电路的仿真结果表明,倍压整流电路具有较高的整流效率,可由半波整流电路的43%提高到74%;所实现的二级倍压整流电路工作于2.4GHz,测试结果和仿真结果基本上吻合。     

基于LIN总线的汽车HID前照灯自动调光系统

针对汽车HID前照灯对自动调光的需求,本文设计了一套基于LIN总线的前照灯自动调光系统。介绍了系统的总体设计方案、硬件组成和软件设计基本思想,并给出了软件编程的基本框架。     

ZigBee在HID电子镇流器上的应用

具有zigBee无线通信控制功能的高压气体放电灯的电子镇流器及其控制系统,可以在近距离范围内,方便地组建网状网络,实现对HID灯进行无线监控的功能。此外该系统还具有安装方便、控制功耗低、易于可编程控制等优点。     

汽车前照灯光源及发展趋势

介绍了汽车前照灯的发展历程和技术现状,重点阐述了氙气灯前照灯和发光二极管前照灯技术优势,并展望了各种灯光源的应用前景和汽车前照灯的发展趋势.     

一种特殊的四倍压整流电路

从气体放电管作为直流负载的要求出发，提出了一种四倍压电路，说明了它的工作原理，作出了定量分析，结合工程实际研究了电路中元、器件的选择，使产品质量得以提高。     

一种LED汽车前照灯的电路驱动设计及实现

简要叙述了LED汽车前照灯驱动设计需求及驱动方式、拓扑的选择,进行了以MAX16833为核心的汽车前照灯驱动硬件平台的设计和实验研究,对主要的元件进行了分析计算及选型,研制了试验样机,进行了样机的调试和有关试验.试验表明,系统各部分运行正常,实现了汽车大灯的光功能要求,与同类产品相对比,散热效果好,效率更高,输出电流纹波更小,为LED汽车前照灯的驱动开发奠定了基础.     

一种小功率高压开关电源的设计

本文介绍一种利用推挽变换、倍压整流电路实现高压输出的设计方法，重点介绍主电路、高压变压器、反馈控制电路的设计以及可靠性热设计，最后给出了设计结果及实际测试情况。     

Novel Design of HID Lamp Electronic Ballast for Automotive Systems

This paper presents a high intensity discharge（HID） lamp for automotive illumination. A novel type of ballast for HID is proposed without an acoustic resonance. The system consists of high frequency DC/DC converter,DC/AC inverter（SLA2403M）, high voltage igniter and a microcontroller unit（MCU）. The proposed ballast controls the complex start-up process and constant power process by programming on the rnicrocontroller. It is verified that experimental results agree well with the calculated ones. The ballast features such functions as failure protection, line under-voltage, line over-voltage, output short circuit and disconnection protections.     

数模双环路HID安定器的设计

HID氙气灯必须工作在恒定功率条件下,通常采用功率误差检测环路来实现。在分析了35 W车用HID氙气灯工作特性和市场上HID氙气灯安定器设计特点的基础上,提出了一种新颖的HID安定器的设计方案,其特点是同时采用了数字和模拟两个功率误差检测环路。实验表明,采用以此结构设计的安定器既保证了很好的瞬态特性,又保证了进入稳态后输出功率的稳定性。     

Analysis and Improvement of Automotive High Intensity Discharge Lamp Ballast Based on Microcontroller Unit

The superior performance of high intensity discharge（HID） headlamp is clearly shown for luxury sedans, and the lamp luminescence properties are analyzed. The principle of its ballast technology is analyzed in detail. For against the disadvantage of current ballast technology for sedans lamp, a novel type of electronic ballast for HID is designed based on programmable intelligent computer（PIC） microcontroller unit（MCU） and S1A2410M inverter and it provides guidance and can be easily used in control configuration selection and design. The feasibility and superiority of the system are proved.     

Implementation of a Voltage Multiplier Integrated HID Ballast Circuit With Dimming Control for Automotive Application

High-intensity discharge (HID) lamps are becoming popular substitutes for halogen lamps in automotive headlamps because of the high lumen/watt ratio and the color of the light. In this paper, a ballast (integrated with a voltage multiplier circuit in the secondary winding of the dc converter transformer) with dimming control is presented. The proposed circuit not only eliminates one auxiliary winding but also reduces the voltage across the switch on the primary side and consequently permits the selection of switches with a lower rating. A brief review of the HID circuits is done and compared with the proposed circuit. Experimental results from the prototype are presented. This paper also presents different methods of dimming the automotive HID lamps based on analog and digital control and discusses the relative merits of each of the methods. The dimming control is implemented using both the methods, and experimental results are presented. It is envisaged that the dimming control will provide some flexibility to drivers in the control of HID lamps to suit the driving conditions in the modern cities that are very well lit at night. This paper investigates the merits of each method and discusses the practical issues for implementing such controls.      

信息光源的点灯控制线路

随着信息产业的迅速发展,信息产业已开发出许多信息用设备,这些设备具备有读出、处理记录、传送、显示等功能。为实施这些功能必须正确选择所用的光源和好的点灯线路。本文主要介绍信息光源的点灯线路的控制和发展动向。信息产业用的光源有卤钨灯,荧光灯和短弧ＨＩＤ灯。点灯线路包括直流点灯线路和具有正弦波、矩形波、适当频率波等的交流点灯线路。     

Novel Automotive High Intensity Discharge(HID) Lamps with Electronic Ballasts

A new scheme of automotive high intensity discharge(HID) lamps with electronic ballasts is proposed. The design of the proposed ballast and some experimental results are presented. The proposed scheme is consisted of the high frequency DC-DC converter and the low frequency DC-AC inverter. This system separates the input voltage of the ignitor from DC link voltage using auxiliary winding, then it could use the lower voltage rating power devices for HID lamp ballast system and reduce the size of HID lamp ballast. The proposed ballast controller using micro-controller unit(MCU) controls the frequency to operate the DC-DC converter in critical conduction mode, which reduces the noise of the circuit and improves the efficiency by 2%~4%.     

设备应用于智能遥控器中的设计与实现

基于高端智能电视机的需求和发展趋势,提出了基于HID规范的体感游戏手柄,应用于智能遥控器中的设计方案和实现方案。在对智能遥控器各个功能模块分析的基础上,设计了体感游戏手柄实现的硬件电路方案。根据自定义的数据包格式,介绍了在智能遥控器的RF收发器端实现具有输入和输出功能的体感游戏手柄的软件方案,详细叙述了智能遥控器的RF收发器端与电视机之间的通信过程,最终实现体感游戏手柄的功能。     

一种数字控制HID灯电子镇流器的研制

介绍了一种单片机数字控制车用前照明高强度气体放电灯（high intensity discharge，HID）电子镇流器。镇流器系统主要由高频DC／DC开关电源、DC／AC逆变器、高压启动电路和单片机控制电路组成。它通过单片机软件编程，实现精确的数字控制，确保HID灯启动复杂的时序控制和恒功率控制过程，而且可以很好地处理各种故障模式，具有输入过压／欠压保护，输入反接保护，输出短路、开路保护等功能。