Boost PFC变换器中电解电容ESR和C的监测研究
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
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