文档介绍：摘要
本文对Boost型功率因数校正技术进行了分析、设计和研究。详细分析了有源功率因数校正器的基本工作原理,通过比较几种不同拓扑的PFC变换器主电路的优缺点,和比较控制电路的几种不同控制方法的优缺点,明确本文所要研究的对象为平均电流控制(ACM)的Boost型功率因数校正器。
在此基础上对Boost主电路和控制电路进行数学建模,得出其状态方程和传递函数,运用仿真软件MATLAB中的Simulink工具,建立了Boost主电路和控制电路的Simulink仿真模型,并得出其仿真结果。
本文根据Boost变换器的特点和要求,设计了一个具体、实用的带PFC功能的开关电源电路,并给出了具体设计步骤和电路参数的计算。
平均电流控制的单相Boost功率因数校正电路,完全能够达到整流、高输入功率因数、升压、稳压、低纹波的目标,具有广阔的应用前景。
关键词:功率因数校正;Boost变换器;仿真
Abstract
Based on the summary of the fruits of the research of the Active Power Factor Correction, the PFC system, which adopts Boost power converter circuit and Average Current Mode control scheme, is well studied in this thesis.
According to the principle and the discussion of the single-phase active power correction, concluding different structures of the main circuit and methods of the controllers, the PFC system, which adopts Boost power converter circuit and Average Current Mode control scheme is indicated as the developing direction of PFC and regarded as PFC system structure.
Then, the state differential equations of ideal Boost converter and the general transfer functions of PWM converter are deduced and the simulation models of ideal converter are showed using MATLAB.
Besides, we design a practical circuit with the function of PFC, giving discrete design steps and the calculation of the circuit parameters.
Finally, we can conclude that the PFC system which adopts Boost power converter circuit and Average Current Mode control scheme can achieve good performance, which can be used widely in the future.
Key words: PFC (power factor correction); Boost converter; Simulation
目录
第1章绪论 1
课题研究意义 1
功率因数 1
功率因数校正方法 2
本文所做的主要工作 4
第2章有源功率因数校正技术 5
APFC原理 5
APFC技术分类 6
有源功率因数校正的主电路拓扑 6
有源功率因数校正技术的工作模式 7
有源功率因数校正技术的控制策略 9
第3章 APFC电路的设计 14
APFC电路的选择 14
APFC电路的参数设计 15
本章小结 20
第4章 APFC电路的仿真分析 21
MATLAB简介 21
APFC主电路的仿真 22
Boost型APFC电路的仿真 25
APFC电路的优化设计 30
本章小结 33
结论 34
参考文献 35
致谢 36
第1