Boost PFC变换器中电解电容ESR和C的监测研究

摘要根据相关研究，有超过一半的电源故障都是由于电解电容的老化失效引起，电解电容的故障成为影响电源故障率的最主要原因。为了能够有效的预测PFC变换器电路的工作状态，监测电解电容的寿命是十分重要的。通过监测电解电容的工作状态，计算电解电容的参数，构建数学模型，预测电解电容的寿命。来减少因为电解电容的故障而引起的PFC变换器的故障率。
在对电解电容器特性及PFC电路有了相关认识和知识基础的前提下，进行数学推算，得到电解电容参数ESR和C的变化关系，通过模拟电路，来构建SABER仿真模型。根据所提出的电解电容器参数数学推算结果，结合仿真实验，成功验证了方法的可实现性与正确性。 22963
关键词电解电容器    BOOST PFC   SABER 数学推算
毕业设计说明书（毕业论文）外文摘要
Title    monitoring studies of electroltic capacitors ESR and C in Boost PFC converter
Abstract
According to related research, more than half of the power failures are due to failures caused by the aging of the electrolytic capacitor. electrolytic capacitor failure become the most important reason for power failure rate.Can monitoring electrolytic capacitor life is very important for effectively predicting the operating state of the PFC converter circuit.By monitoring the working condition of electrolytic capacitors, we can calculate electrolytic capacitor paraments, construct a mathematical model to predict the life of electrolytic capacitors.Though this way ,we can reduce the failure of PFC converter because of electrolytic capacitor failure.
With relevant in the context of understanding and knowledge base of the characteristics of electrolytic capacitors and PFC circuit. using mathematical projections by the method of analog circuits to achieve,we obtain the ralationship between the parameters of electrolytic capacitor ESR and C and build SABER simulation model. According to the proposed mathematical projection results, combined with simulation experiment, successfully verified the feasibility and correctness of the program.
Keywords Electrolytic capacitors BOOST PFC SABER mathematical projection
目   次
1 绪论    1
1.1 研究背景与意义    1
1.2 本文主要内容和意义    2
2 电解电容器    3
2.1 电容器的基础知识    3
2.2 铝电解电容的基本知识    4
3 电解电容寿命    7
4 ESR与C    8
4.1 电解电容的等效电路    8
4.2 ESR的介绍    8
4.3 C的介绍    9
4.4 监测ESR与C的意义    9
5 boost与PFC技术    11
5.1 PFC技术简介    11
5.2 boost电路简介    11
5.3 基于Boost电路的PFC变换电路    12
5.4 PFC技术的意义    15
6 PFC电路中电解电容的参数测算    16
6.1 理论推导    16
6.2 创建仿真模型    18
7 Boost型PFC变换电路仿真电路设计    20
7.1 Boost型PFC变换电路主电路选择    20
7.2 Boost型PFC变换电路控制电路设计    20
7.3 Boost型PFC变换电路采样电路设计    22
8 Boost型PFC变换电路仿真实验    29
8.1 实验一：验证推导公式的正确性    29 Boost PFC变换器中电解电容ESR和C的监测研究:http://www.youerw.com/zidonghua/lunwen_15839.html