3kva三相应急电源的设计毕业设计（论文）word格式_精品.doc

摘要 随着社会的进步和发展,人们生活质量的不断提高,人们对供电的依赖越来越大,EPS（Emergency Power Supply）以其特有的优越性逐渐被人们认识和采用,在一个工程中,它可以灵活的运用在消防供电回路末端、个别重要场所以及作为一级负荷中特别重要负荷的应急电源等多种情况。因此,了解EPS应急电源的工作原理和特性,并将其合理的运用于电气设计当中显得非常重要。本文从应急电源(EPS)的实际应用需求出发,通过对构成EPS的各功能单元的设计考虑和性能特征的分析,对EPS的构造原理、性能特点、适用领域及进一步完善作了较为全面的分析与讨论。本文着重研究了三相EPS系统的逆变部分Abstract With the progress of society and improvement of living quality, people rely increasingly on power supply; while EPS with its unique superiority has been gradually acknowledged by people. EPS can be applied to fire-fighting circuit end and some important site work as well as emergency supply for the stage load. So it is very important to learn the operating principle and features of EPS emergency supply to apply it into electrical design appropriately. The principle, characteristics and application field of EPS based on the analysis of function block are presented. And the improving measures are also discussed. This article focuses on the three-phase inverter system, part of EPS. Keywords: emergency supply; EPS; operating principle;; contra-variance 目录 摘要…………………………………………………………………………………………Ⅰ Abstract……………………………………………………………………………………Ⅱ 目录…………………………………………………………………………………………Ⅲ第1章 绪论 1.1 背景……………………………………………………………………………………1 1.2 应急电源的现状和发展趋势……………………………………………………………1 1.2.1 应急电源领域的现状……………………………………………………………1 1.2.2 应急电源的分类…………………………………………………………………2 1.2.3 应急电源的发展趋势……………………………………………………………3 1.3 逆变电源技术概况………………………………………………………………………4 第2章 三相应急电源的总体设计 2.1 应急电源的工作原理……………………………………………………………………6 2.2 应急电源的设计要求……………………………………………………………………6 2.3 三相应急电源设计系统参数……………………………………………………………7 2.4 传统的三相应急电源电路 ……………………………………………………………7 2.5 新型的三相应急电源电路 ……………………………………………………………8 第3章 新型的三相应急电源主电路设计 3.1 输入整流器/滤波器的设计……………………………………………………………11 3.2充电器的设计……………………………………………………………………………11 3.3充电电路变压器的设计…………………………………………………………………13 3.4充电电路开关器件的选择………………………………………………………………14 3.5逆变器的设计……………………………………………………………………………14 第4章 三相PWM逆变器的原理及控制 4.1 三相PWM逆变器…………………………………………………………………………15 4.1.1 三相逆变器的工作原理………