【毕业论文】开关电源功率因数校正电路设计.doc

毕业设计说明书 开关电源功率因数校正电路设计 院、系、部： 电力工程学院 专 业：电气工程及其自动化（电力系统及其自动化） 2008 年6月 南 京 摘 要 随着电力电子技术的发展及电力电子装置的普遍应用，在电力系统中产生了大量的电力谐波，谐波问题已经成为电气工程领域关注的焦点问题之一。有源功率因数校正（APFC）技术作为消除电网谐波、提高整流装置功率因数的一种有效措施，受到学术界普遍关注，发展十分迅速，其分类越来越多，应用越来越广。 本文介绍了功率因数校正（PFC）技术的发展及其主要特点，阐明了其研究的必要性和重要性。分析了各种功率因数校正的基本工作原理，并从主电路的拓扑形式和控制方式分析了各类有源功率因数校正的方法，本文还介绍了功率因数校正技术的热点问题和发展方向。 以单相有源功率因数校正系统为背景，介绍了目前常用的有源功率因数校正控制技术的分类和各自的特点。单相Boost型有源功率因数校正系统进行了设计，建立了MATLAB的仿真模型，并进行了仿真分析。通过理论分析和仿真分析说明平均电流控制的单相Boost型有源功率因数校正器具有实现简单、抗干扰能力强、响应速度快、适应输入电压和负载变化范围宽等优点。 论文分析了Boost变换电路，并且应用UC3854搭建了仿真电路，设计、计算了主电路和控制电路的所有参数，在此基础上，用MATLAB/simulink进行了整个电路的仿真。经验证，电路的功率因数有了明显改善。 关键词：开关电源，功率因素校正，电路设计，平均电流型 Abstract A great amount of power harmonics is produced along with the development of power electronics and the wide application of power electronics equipments. Harmonic issue has become a focus of concern in the field of electrical engineering problems. Active power factor correction （APFC）is regarded as an effective way to correct power harmonics and to improve power factor and has been paid much attention by the academic community. It develops very quickly and be applied more widely. This thesis describes the main characters and development of Power Factor correction （PFC） technology. Its investigative necessity and importance are clarified. The basic theory for all sorts of Power factor correction is analyzed，and the topology and control circuit are studied. In the thesis the hot problems and development of PFC technology are analyzed farther. Taking single-phase APFC systems as an object, this dissertation introduces the classification and their respective characteristics of the control strategy of APFC in common use at present. The single-phase Boost APFC system of the Predictive Averaged Current Mode Control is designed. Building the simulation model which accepted by the internal of MATLAB. And the simulation results are analyzed. Theoretical analysis and simulation analysis sho