数字锁相技术在APFC电压采样中的应用  

Application of digital phase locked loop in voltage sampling of APFC

作　　者：刘攀[1] 高艳霞[1] 杨郑浩[1] 

机构地区：[1]上海大学,上海200072

出　　处：《电气传动自动化》2012年第6期31-35,共5页Electric Drive Automation

摘　　要：分析了单相有源功率因数校正(APFC)电路电流畸变的原因,提出利用数字锁相环技术解决电流过零点以及峰值畸变的问题。通过旋转坐标变换完成对数字锁相环的建模,同时针对q轴分量的滤波要求,设计数字巴特沃斯滤波器,利用数字锁相环对输入电压进行采样以减小电流失真度,实现功率因数的调节。仿真和实验结果证明了数字锁相环技术在APFC电压采样中的有效性。The reasons of current distortion in single-phase active power faetor eorreetion （APFC） is analyzed, and a new method to solve the problems of zero-crossing point of the eurrent and peak distortion by digital phase loeked loop teehnique is proposed. Through rotating coordinate transform to modeling of digital phase loeked loop, the digital Butterworth filter is designed aeeording to the requirements of the q-shaft eomponent. The input voltage is sampled to reduce the current distortion degree by using digital phase lock loop, and the power factor eorreetion is realized. The simulation and experimental results show the effeetiveness of the digital phase locked loop technology in voltage sampling of APFC.

关 键 词：单相PFC 电流畸变 数字锁相 巴特沃斯滤波器 

分 类 号：TN911.8[电子电信—通信与信息系统]