摘要
针对数字有源功率因数校正(APFC)中采样点选择的问题,详细分析了在模拟控制APFC中,平均电流法THD相对其他控制方法谐波畸变(THD)较小的原因;比较了数字控制平均电流法与模拟控制平均电流法的不同之处。最后,提出了一种改进数字平均电流控制APFC采样的方法,使数字采样值更加精确,并且与其他两种采样方法进行了比较。Matlab仿真和实验验证了该采样法的有效性。
Firstly, the reasons why the total harmonic distortion （THD） of analog controlled active power factor correction （APFC）is better in the average current mode are analyzed.Based on these reasons,the differences between digital controlled and analog controlled PFC are compared then.Finally,an improved sampling method is pointed out by which the digital sampling values are more accurate than other two sampling methods.At the same time,the validity of the methods is proved by Matlab numerical simulations and experimantal results.
出处
《电力电子技术》
CSCD
北大核心
2009年第5期10-11,44,共3页
Power Electronics
关键词
数字控制
功率因数
校正/采样
digital control
power factor
correct / sampling
