This design is simple and flexible , the parameters of spwm are adjustable , and the sine output is quality . in order to reduce emi , pfc is designed which eliminate the disturb to power net and itself . the design adopts the normative procedure 为了减少开关电源的emi ，还设计了非连续导电模式的pfc功率因素校正电路，不但减少了因高频开关斩波对电网不良影响，还降低了对仪器本身的干扰。
The thesis also analyzes the average current type of pfc , and gives a design of the former pfc circuit of 1100w switching - power . the key practical techniques of the design are discussed . the experiments have been completed and satisfied results are obtained 论文还研究了平均电流型pfc电路，并设计了1100w开关电源前级的功率因数校正电路，分析了其中实用关键技术，完成了实验研究，获得了满意的试验结果。
Abstract : the author puts forward a constant - current control system of diode rectifier with saturable reactor in electrolytic aluminum . the working principle of saturable reactor is depicted . also analyzed are the system configuration and features of system correct circuit 文摘:介绍了应用于电解铝的加饱和电抗器的二极管整流器的恒流控制系统，简述了饱和电抗器的工作原理，分述了系统构成和系统校正电路的特点。
And at this foundation through the dispersed domine analyse the paper makes a great emphasis on the application of computer aided design and simulation , then designs a series of apfc design and simulation software . this paper takes out a set of designation and simulation on base of actual circuit . the reliable result , output voltage and inductance current which are got from this software are the same as the actual value 本文在对一系列apfc电路设计、仿真分析方法讨论比较的基础上，着重应用离散时域法进行了计算机辅助电路设计和仿真方法的应用探索，以此为基础设计了pfcexpert功率因数校正电路设计、仿真软件，针对实际电路给出了整个设计和仿真全过程，通过实验验证了该软件所得到的精确稳态解、瞬态输出电压和电感电流，与实际电路输出基本相同，所建立的电路模型重现了电路的运行过程，反映了电路的实际工作机理。
The main job accomplished of this paper includes : according to the principle and the discussion of the single - phase active power correction , the pfc system , which adopts cuk power converter circuit and average current mode control scheme is indicated as the developing direction of pfc and regarded as the pfc system structure 全文围绕设计cuk型平均电流控制的功率因数校正电路展开，主要完成了以下工作：论文在分析有源功率因数校正器基本工作原理的基础上，通过比较几种不同拓扑的pfc变换器主电路和控制电路的优缺点，明确了本文所要研究的对象?平均电流型控制的cuk型pfc变换器。
In the hardware design , the paper completes modules ’ design like outside memory , patulous a / d , patulous d / a , rs232 communication , ecan communication , led control , keyboard control , distant control , emulation , reset , logic voltage switch , dsp supply power regulate and ac - dc power circuit , as well as room layout design like anterior panel , back panel etc . and dsp transfers data with peripheral equipments except outside memory using serial ports . besides , the whole circuit is configured in interrupt response . thus , it can meet system demand as well as take full advantage of tms320f2812 ’ s hardware resource . in the software design , the paper finishs programs like the interface programms intercommunicates with people , the distant control program , ad and da modules ’ control program , in addition , the paper select the velocity and acceleration state - feedback algorithm and is written in the program . the software design uses dsp integrate exploiting environment named ccs2 . 2 of ti inc . as software instrument , and programs with the combination of c language and assembly language . moreover , in order to maintenance or modify the software expediently and shorten software ’ s exploitation time , the design adopt software modularization technique . finally , some air cylinder experiments are carried out to proved that the pneumatic controller is very practical 在硬件设计中,本文完成了片外存储器扩展、 a / d扩展、 d / a扩展、 rs232通信接口、 ecan通信总线接口、液晶显示控制、键盘控制、远程控制、仿真、复位、逻辑电平转换、 dsp工作电源校正电路和ac - dc电源等模块设计以及控制器前面板、后面板等的空间布局设计。其中dsp与除外部存储器的外围设备之间的数据传送全部采用串口通信,同时系统电路配置成中断响应方式,这样既满足了系统要求,又充分利用了tms320f2812的硬件资源。在软件设计中,本文完成了人机界面功能模块、远程控制模块、 ad扩展模块、 da扩展模块、速度和加速度状态反馈的控制算法的程序设计。
The requirements are the following : ( 1 ) input voltage : 220 vac ; ( 2 ) output voltage : 48 vdc ; ( 3 ) output current : 20 adc ; ( 4 ) switching frequency : 80khz ; ( 5 ) operated frequency of apfc : 100khz the simulated software pspice 7 . 1 realizes simulation research of the main circuit , and the simulated result of key waveforms in the main circuit is introduced 设计指标为：输入电压为交流220v ，频率为50hz ，输出电压和电流为48v ， 20a ，功率因数校正电路的工作频率为100khz ，直流变换器电路的工作频率为80khz 。利用仿真软件pspice7 . 1对主电路进行了仿真研究，并介绍了主电路的几个关键波形的仿真结果。
Based on the detailed analysis of the principle of single - phase active pfc , the high power active pfc circuit is designed , and the method of designing boost inductor is also given in the paper . a high power phase - shifted - control soft - switching full - bridge converter is designed , and the condition of achieving zvs ( zero voltage switching ) is studied in detail 论文在详细分析和研究单相有源功率因数校正原理的基础上，设计出大功率有源功率因数校正电路，并给出电路中升压电感的设计方法；设计出了大功率移相控制全桥软开关pwmdc dc变换器，详细的研究了实现zvs的条件。
