【作者】 胡忠臣；

【导师】 张茂青；

【作者基本信息】 苏州大学 ， 控制理论与控制工程， 2009， 硕士

【摘要】 金属卤化物灯(简称金卤灯)作为高强度气体放电灯的重要灯种,在电光源工业中是最具发展潜力的高科技产品,也是代表电光源工业最高技术水平的产品,以其光效好、寿命长、节能效果好等特点而在绿色照明领域中得到广泛应用,特别是在城市道路、商业广场、超市、摄影和工矿照明中大量使用,有着非常大的市场发展空间。但是由于金卤灯的负阻特性和特殊的启动要求,必须和与之相匹配的镇流器共同使用。电子镇流器有着许多优点,对它的研究和开发也是电力电子行业的一大热点。传统的模拟控制电子镇流器往往功能比较单一,显得麻烦而且复杂。数字控制电子镇流器能够简化电路设计,易于调节控制,更好地满足灯的安全、性能和可靠性要求。本文首先介绍了金卤灯的控制原理和结构特点,分析了它的启动特性以及对镇流器的要求,从电子镇流器研究设计的关键技术出发,分别讲述了电源电磁干扰、电流谐波和功率因数校正、磁性材料选择和设计、声共振问题等主要难点,并给出了解决方法和参考依据;其次,本文以35W金卤灯为研究对象,设计了一种安全可靠的数字式电子镇流器。利用AVR单片机作为控制器,设计了电路的中间级Buck电路部分,使其输出电压可调,对常用的启动点火电路进行了实验对比分析和仿真研究,确定了一种合适的启动电路,又设计了镇流器的电流和电压实时采集电路,运用数字PI调节使镇流器达到恒电流控制,使金卤灯功率稳定,并从软硬件方面设计了整个系统的保护电路;最后,本文利用PSpice仿真软件建立了金卤灯模型,并将整个电路模型和金卤灯模型有机地结合起来,进行仿真实验分析,由此验证了数字电子镇流器理论分析的正确性和设计的合理性。整个系统采用低成本单片机为控制核心,实现了对电子镇流器的智能化控制,使其具有结构简单,功率稳定、自我故障检测和自我保护等功能。设计出满足现代高质量照明要求的电子镇流器,为实现更有效的照明节能系统的研究和设计提供了参考依据和实用价值。更多还原

【Abstract】 The Metal halide lamp (MHL), it is the important light source as a high-intensity gas discharge lamp, it has the most development potential of high-tech products and representative of industrial products that have advanced technical level in electrical light sources industry. The metal halide lamps have some characteristics with high luminous efficacy, long life and good energy-saving to be widely applied at green illumination field. It is used in city roads, commercial plaza, supermarket, photographic lighting and industrial lighting in the large-scale application, it has a long-range developmental future.However, it must be matched with ballast because of the negative resistance and special characteristics of the metal halide lamps. Electronic ballasts have many advantages, its research and development is a hot spot in the power electronics industry. Traditional analog control method of MHL are often single, seems more trouble and complexity. The digital control method of MHL can make the whole circuit simplify, it is easy to adjust control signals to make better meet the security, performance and reliability requirements.Firstly, the thesis introduces control principle and structural characteristics of the metal halide lamp, analysis its startup feature and requirements of ballast, this thesis starts from key technology research and design analysis of the electronic ballast, respectively tells EMI of power, current harmonics and power factor correction, select and design method of magnetic materials, the problem of acoustic resonance and so on, and proposes solutions and reference for ballast; Secondly, This article takes the 35W metal halide lamp as research object, designs a safe and reliable electronic ballast, Selects AVR as the use of single-chip controller, designs Buck circuit to adjust output voltage, designs experiment circuit and simulation comparison with old ignition circuit and determine an appropriate start-up circuit, and this thesis designs current and voltage real-time acquisition circuit, using digital PI regulator to enable ballast to achieve constant current control so that the metal halide lamp have stability power, and this thesis designs circuit that protect the whole system based on hardware and software; Finally, this article uses PSpice simulation software to set up a metal halide lamp model, and combines the whole circuit model and the Metal Halide models, to carry out simulation analysis, which verify theoretical analysis of digital electronic ballast design correctness and reasonableness.The entire system adopts low-cost single-chip core as a controller, achieves intelligent control of electronic ballast, it is simple in structure, power stability, self-fault detection, self-protection functions, designs system to meet modern high-quality electronic ballast for the lighting requirements. It offers application value and reference in order to achieve more effective energy-saving lighting systems.更多还原