【作者】 李慧；

【导师】 邓焰；

【作者基本信息】 浙江大学 ， 电力电子与电力传动， 2012， 硕士

【摘要】 功率因数校正(PFC)是电力电子技术的重要组成部分,已经得到广泛应用。现有的功率因数校正模拟控制技术已经相当成熟,工业领域应用很多。然而,传统的模拟控制具有许多不可克服的缺点。相比之下,数字控制系统具有电路简单、控制方式灵活、可靠性高、兼容性强,且易实现先进的控制算法等优点。随着数字控制技术的不断发展,功率因数的数字控制成为研究的热点。本文首先综述了数字控制有源功率因数校正技术的发展现状,分析了各类有源功率因数校正的方法和基本原理,阐明了数字控制功率因数校正技术研究的必要性和重要性。但是,传统的数字控制也存在一些缺陷,如控制响应延时问题。近年来,多家公司推出了具有模拟比较器自关断功能的PWM控制器,其内部含有模拟比较器,且模拟比较器的输入端可由内部DAC模块输入。采用这种控制器可以实现峰值电流模式的数字控制,且算法相对简单,使用的CPU资源较少,可以在同一DSP或MCU内实现对多个变换器的控制。本文主要研究将该控制器运用于数字峰值电流控制的PFC电路中。为了验证控制系统的可行性,本文第二章对峰值电流控制Boost PFC数字控制系统进行建模,第三章详细分析了本实验主电路和控制电路参数的设计过程,并利用Matlab/Simulink仿真软件进行仿真验证。本文第四章详细阐述了在电感电流连续和临界连续两种模式下,数字峰值电流控制PFC的控制算法和软件设计流程。最后,本文以TMS320F28035为控制核心,针对两种模式分别设计了一款Boost PFC数字控制器,达到了良好的效果,证明了理论的正确性。更多还原

【Abstract】 PFC is the most important part of power electronic technology, which has been widely used in industry. The analog control technology of PFC is mature and has been used in many areas of industry,but there has many unconquerable disadvantages. In contrast,digital control system has many advantages such as simple circuit,flexible control mode,high reliability and easy to realize advanced control algorighm.With the continuous development of digital control technology,the digital control of PFC became a research focus.This article first summarizes the development status of the active power factor correction technology with digital control, and analyses the various methods and basic principles of active power factor correction. But traditional digital control has some (?), such as respond delay. In recent years,multi-companies recommended P WM controller with self-shut off by internal analog comparator, which can be input by internal DAC module. With this kind of controller, it can realize digital peak current control, and the algorithm is relative simple, also the CPU source used is small. So it is possible to control multi-converters just using one DSP or MCU. This article mainly researches using the controller in the Boost PFC circuit with digital peak current control.In order to verify the feasibility of the control system, the second chapter modeling the digital control system of Boost PFC with peak current control. In the third chapter of this paper has a detailed analysis of the parameters design process of the main and control circuit and simulates it using Matlab simulink (?)he fourth chapter elaborates the control algorithms of PFC with digital peak curren-t and the process of software design in CCM and CRM mode. Finally, the paper designed Boost PFC digital controller in both modes based on TMS320F28035, the experimental results indicate the correctness of the theory.更多还原