【作者】 梁安平；

【导师】 王银乐；

【作者基本信息】 华东交通大学 ， 电力系统及其自动化， 2009， 硕士

【摘要】 随着电子科学技术的飞速发展,开关电源类装置在生产和生活的各个领域应用日趋广泛。然而,由于其低功率因数,给电力系统注入了大量的谐波,致使电网中谐波的污染日益严重。有源功率因数校正技术是提高功率因数,减少整流电路谐波的重要手段,能够使输入电流成为与电网电压同相位的正弦波,使整流电路基本不产生谐波。因而成为目前电力电子学领域研究的热点。本文首先对有源功率因数校正的基本原理,基本变换电路和控制策略进行了比较和分析,在此基础上,明确了本文研究的对象为平均电流控制的Boost型APFC电路。然后,详细分析了平均电流控制的Boost型APFC电路的结构和工作原理,并建立了基于平均电流控制的Boost型APFC电路的小信号模型。最后,设计完成了基于UC3854的500W Boost型APFC电路,并用MATLAB对电路进行了建模和仿真分析。本文是电路设计和仿真实践相结合的结果。作者在电路原理分析及电路设计的基础之上,运用仿真软件MATLAB对Boost型APFC电路的主电路和控制电路分别进行了建模和仿真分析,仿真结果均达到预定指标,验证了本文理论分析和电路设计的正确性。更多还原

【Abstract】 With the fast developing of electronic science and technology, the devices of switch power supply have been used in the field of manufacture and living gradually extensive. However, because of the low power factor of these devices,it has injected a lot of harmonic in electrical power system, which cause the harmonic pollution problems are increasing serious. The active power factor correction technology is an important method which can increase the power factor and reduce the rectification circuit harmonic current. This technology can make the input current to be sinusoidal wave with the same phase with the input voltage, and make the rectification circuit doesn’t produce harmonic current basically. The APFC technology become an hot research subject.In this paper, we firstly analyzed and compared the basic principle,basic convert circuit and the control method of active power factor correction. In this foundation, identified the Average Current Mode control Boost APFC circuit as the research target of this paper.Then, we analyzed the structure and work principle of the Average Current Mode control Boost APFC circuit in detail, and set up the small signal model based on the Average Current Mode control Boost APFC circuit. Finally, designed and finished the 500W Boost APFC circuit based on UC3854, and built the simulation modle, analyzed the simulation results by MATLAB.This thesis is a production of circuit design and simulation practice. Based on the circuit principle analysis and circuit design, the author simulated main circuit and control circuit of APFC circuit by the simulation software ---MATLAB. The simulation results indicate that the circuit has achieved the design specification and the expected electrical characteristics, also have verified the correctness of theoretical Analysis and circuit design in this paper.更多还原