不间断直流UPS的设计与分析+电路图
本文针对移动不间断电源需要便于携带、可靠直流供电、噪声小及能耗低的实际特点，设计了一种小型直流UPS电源。结合NCP1337 准谐振脉冲宽度调制电流模式控制芯片、LT1512 电流模式开关稳压芯片以及LTC3780 高性能降压－升压型控制芯片完成AC/DC 和DC/DC 等主要转换控制。28615
关键词 UPS 不间断电源 AC/DC DC/DC 充电放电电路
毕业论文设计说明书外文摘要
Title uninterruptible DC-UPS design and analysis
Abstract
UPS is the short for uninterruptible power supply, is a stationary CVCF power electronics power supply including energy storage device comprising, with guaranteed voltage and frequency stability, improve power quality and other functions, mainly used to computers, and other power supply electric power electronic devices.Back-UPS has many advantages such as: a small size, high efficiency, low cost, low operating cost and so on, it is widely used in various sectors of production and life, primarily used in computer systems.
In this paper, an uninterruptible power supply required for mobile and portable, and reliable DC power supply, low noise and low power consumption of the actual characteristics si designed as a small DC UPS.Combined NCP1337 quasi-resonant current mode pulse width modulation control chip, LT1512 current mode switching regulator chip and high performance LTC3780 buck - boost control chip to complete the AC / DC and DC / DC and other major conversion control.
Keywords UPS Uninterruptible Power Supply AC/DC DC/DC charge discharging circuit
目录
1 引言 1
1.1 研究的目的和意义 1
1.2 国内外研究概况、水平的发展趋势 1
1.3 UPS的分类 2
1.3.1 后备式不间断UPS电源 3
1.3.2 在线互动式UPS电源 3
1.3.3 双变换在线式UPS电源 4
1.3.4 双逆变电压补偿在线式UPS电源 4
1.4 课题研究的主要内容以及意义 5
1.4.1 研究的主要内容 5
1.4.2 研究的意义 5
2 总体方案设计 7
2.1 直流不间断电源的方案设计 7
2.2 方案总体评价 7
3 AC/DC模块分析与设计 9
3.1 NCP1337功能介绍 9
3.2 AC/DC模块电路设计 10
3.2.1 电源输入电路 11
3.2.2 EMI滤波电路 11
3.2.3 初级整流滤波电路 11
3.2.4 输入过欠压以及过载保护电路 11
3.2.5 辅助电源电路 12
3.2.6 级次同步整流电路 12
3.2.7电压反馈取样电路 12
3.2.8掉电/来电检测电路 12
4 DC/DC充电电路的分析与设计 15
4.1 充电电路的设计 15
4.1.1恒压式充电 15
4.1.2恒流式充电 16
4.1.3 先恒流后恒压式充电 16
4.2 基于LT1512芯片的充电电路设计 17
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