LED驱动电源谐波生成与检测分析

Analysis of Harmonic's Generation and Measurement on LED Driver Power Supply

LED照明驱动技术提高照明驱动效率的同时,产生大量谐波对输入电网和输出应用造成危害。分析LED驱动产生谐波机理和形式,研究其谐波检测分析方法,提出基于Matlab使用加窗插值快速傅里叶变化(FFT)法对样机谐波数据实行检测和各窗函数优化对比,得出一种对其谐波检测较优方法。

LED lighting driver technology can improve the efficiency of the power while at the same time it produces a large number of harmonic, which harms to power grid and output applications. This paper analyzes the mechanism and form of harmonics produced by LED driver as well as the harmonic detection method. It proposes a method called FFT with window functions double-spectrum-line to detect the data of harmonic from the prototype and compare window functions based on Matlab to obtain a better method for the harmonic detection.