机车雨刮器LLC软开关电源的研究

发布时间：2018-12-14 11:23

【摘要】：随着现代交通运输业的发展以及铁路电气化的大量普及,电力机车的应用越来越广泛。机车雨刮器是电力机车一个重要组成部件,直接影响司机前方的视野,目前雨刮器普遍存在故障率高、不稳定的问题,将给机车运行造成安全隐患。传统的机车雨刮器采用的电机是两台100W的110V非标准直流电机,所以雨刮器电机的成本比较高。本文所研究设计的软开关电源适配给采用两台24V普通直流电机的机车雨刮器,这样极大的降低了雨刮器电机的成本,具有极高的研究价值及意义。电源采用了LLC谐振软开关的结构用以提高电源效率,输出级采用了同步整流技术,较之传统的肖特基二极管(SBD)或快恢复二极管(FRD)整流,采用同步整流技术的开关电源的开关损耗极低,大大提高了整机的效率。同时,机车雨刮器的维护也是机车维护的重点,本文所设计的电源体积小易于实现模块化,电源具有自我保护功能、安全系数高、安装更换方便等优点。文章对设计的雨刮器电源拓扑结构的原理进行了详细分析,尤其对LLC谐振变换器主电路部分和驱动电路部分进行了优化设计,对电源的主要参数,如变压器、谐振腔、采样电路等参数进行了详细的计算,从而使样机各项参数达到最优,应用Altium Designer Winter 09进行样机原理图和PCB的设计,然后调试样机,最后对样机进行波形测试,从测试波形和数据可知,样机开关损耗低,效率高,性能指标达到预期效果。结合以上的工作,本文设计的基于TEA1716的DC110/DC24V的200W软开关电源,输出级采用TEA1995控制的全波同步整流电路,电源具有明显的优越性,有着良好的市场应用前景。
[Abstract]:With the development of modern transportation and the popularization of railway electrification, electric locomotives are used more and more widely. Locomotive wiper is an important component of electric locomotives, which directly affects the sight of the driver. At present, the wiper has the problems of high failure rate and instability, which will cause hidden trouble to the locomotive operation. The traditional locomotive wiper adopts two 100W 110V nonstandard DC motors, so the cost of wiper motor is high. The soft switching power supply designed in this paper is suitable for locomotive wiper with two 24V ordinary DC motors, which greatly reduces the cost of wiper motor and has high research value and significance. The power supply adopts the structure of LLC resonant soft switch to improve the efficiency of power supply, the output stage adopts synchronous rectifier technology, compared with the traditional Schottky diode (SBD) or fast recovery diode (FRD) rectifier, The switching loss of the switching power supply using synchronous rectifier technology is very low, which greatly improves the efficiency of the whole machine. At the same time, the maintenance of locomotive wiper is also the focus of locomotive maintenance. The power supply designed in this paper is easy to realize modularization in small volume, with the advantages of self-protection, high safety factor, convenient installation and replacement, and so on. In this paper, the principle of the topology of the wiper power supply is analyzed in detail, especially the main circuit and driving circuit of the LLC resonant converter are optimized, and the main parameters of the power supply, such as transformer, resonator, are optimized. The sampling circuit and other parameters are calculated in detail, so that the parameters of the prototype are optimized. The prototype schematic diagram and PCB are designed by using Altium Designer Winter 09, then the prototype is debugged, and the waveform of the prototype is tested. From the test waveform and data, it can be seen that the switch loss of the prototype is low, the efficiency is high, and the performance index reaches the expected effect. Combined with the above work, the 200W soft switching power supply based on DC110/DC24V based on TEA1716 is designed in this paper. The output stage adopts the full wave synchronous rectifier circuit controlled by TEA1995. The power supply has obvious advantages and has a good market application prospect.
【学位授予单位】：湖南工业大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：U260.4;TN86

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