智能高频开关电源系统设计与仿真

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智能高频开关电源系统设计与仿真(任务书,开题报告,外文翻译,中期检查表,论文17000字,答辩PPT)
摘要
由于发电厂、变电所中,控制部分和保护部分需要安全可靠的供电电源,由蓄电池组组成的高频开关直流电源具有高可靠性的优点,现在成为电力操作电源系统中的重要组成部分。
本文详细分析了国内外高频开关电源的发展和现状,研究了高频开关电源的基本原理和高频开关电源在电力直流操作电源系统中的应用,设计出了一种适应于电力系统的高频开关电源用来替代传统的相控电源。该系统以MOSFET作为功率开关器件,构成Buck开关变换,整个电源由滤波电路、Buck斩波电路、主逆变器、辅助电源、保护电路等部分组成。该系统主电路逆变部分采用了脉宽调制技术(PWM),集成控制器UC3825产生PWM信号,从输出端开始实时采样电压、电流反馈信号,用以控制输出电压、电流的变化。IGBT驱动电路采用单独的集成驱动器M57962L控制器进行驱动和运行,提高了系统的可靠性、安全性。
本次设计的高频开关电源完成了交流电到直流电的变换,将交流电变换为了具有高质量的直流电能,同时具备较好的保护功能,除此之外系统还能调节交流电压输入范围。伴随着现代科技与生活的发展,稳定高性能的高频开关电源及其相关产品在工业应用和日常生活方面都具有非常广阔的市场和应用前景,因此高频开关电源具备较好的经济效益与广阔的市场前景。
关键词:高频 开关电源 PWM 仿真

Abstract
In the power plant and transformer substations, the DC operation power is supplied from high frequency switching power supply (I-IF SPS) and uses bulky batteries as alternative power.
  The paper analyze the present situation development of high frequency switching power supply domestically and overseas, study and research the basal principle of then design HF SPS and its application in electric power system, then HF SPS applied in electric power system in order to replace the old supply controlled by phase angle. The full-bridge converter is made up of four IGBT.The system consists of the AC input stage, main inverter, out put low-pass filter, auxiliary power supply, and load current sharing circuit, etc. The theory of PWM is used in the system, and single of PWM is offered by controllerUC3825.The feedback voltage and current achieved from output is used to control the change of the output. The controller M57962L is used in the IGBT drive-circuit. The primary circuit and the control circuit are insulated by the transformer and photo-coupler,increasing the reliability of the system.
  The design of high frequency switching power completed the AC to DC conversion, will the alternating current to power with high quality DC, also have good protection function and regulatory AC input voltage range in addition to the outside of the system also. Along with the development of modern science and technology and life, stable high performance of high-frequency switching power supply and its related products in the aspects of daily life and industrial applications are very broad market prospect and application value, so high-frequency switching power supply with good economic benefit and broad market prospect.
Key words:Switch Power Supply  High-frequency  PWM  Simulation

智能高频开关电源系统设计与仿真
智能高频开关电源系统设计与仿真


本课题研究的是关于电力系统的智能高频开关电源。本系统要达到的技术指标:
输入电压:380V±20%
电网频率:50HZ±10%
功率因数:≥0.99
输入过压告警:437V±5V
输入欠压告警:320V±5V
输出电压:浮冲:198—290V
均冲:230—320V
稳压精度:≤±0.5%
稳流精度:≤±0.5%
纹波系数:≤±0.1%
均流不平衡度:≤±3%
输出标称电压:220VDC
输出额定电流:5A
输出过压保护:325V±5V
输出欠压保护:195V±5V
效率:≥90%
绝缘电阻:≥10M
绝缘耐压:输出对机壳2KVAC
漏电流≤30mA
时间lmin无飞弧

目录
1  绪论    1
1.1  高频开关电源概述    1
1.2  高频电源开关的发展及国内外状况    1
2  课题论证    4
2.1  课题简介    4
2.1.1  课题研究的意义    4
2.1.2  本课题的研究方法    4
3  设计论述    6
3.1  高频开关电源的基本原理    6
3.2  高频开关变换器    8
3.3  控制电路    11
3.4  高频开关电源的静态分析方法    12
3.4.1  Buck变换器    12
3.4.2  有全桥变压隔离器的Buck变换器    18
3.5  PWM开关变换器的设计    19
3.5.1  开关变换器结构    19
3.5.2  交换器中的开关元件及其驱动电路    21
3.6  整流滤波电路    21
3.6.1  滤波电路    21
3.7  PWM控制器    22
3.7.1  PWM集成控制器的基本原理    22
3.7.2  高速脉宽调制器UC3825    23
3.8  保护电路的设计    25
3.8.1  软启动电路的设计    25
3.8.2  过流过压保护    26
4  电源系统仿真    28
结论    32
致谢    33
参考文献    34
附录    35
社会经济效益分析    35