基于傅立叶变换的逆变器故障检测新方法  

A new fault detection method for inverter-fed drives based on FFT

作　　者：崔博文[1] 

机构地区：[1]集美大学机械工程学院,福建厦门361021

出　　处：《安徽大学学报（自然科学版）》2006年第5期41-46,共6页Journal of Anhui University(Natural Science Edition)

基　　金：福建省自然科学基金资助项目(E0440005);福建省教育厅科研基金资助项目(JAO04230)

摘　　要：利用加窗傅立叶变换对逆变器输出的正序分量进行了分析,获得了输出信号的正序对称分量,提出了基本谱残差的概念.定义了故障决策函数,利用仿真或实验确定故障阈值,通过基本谱残差与阈值的对比可实现逆变器的故障检测,仿真结果表明了本文方法的有效性.The Positive Sequence （PS） component of the inverter output is dealt with using FFT with window function, fundamental PS component is obtained. The concept of spectral residual is proposed, and the fundamental spectral residual is computed recursively by using fixed window width FFT method in the paper. The threshold can be defined by using simulation or experiment, and the fault occurred in the inverter can be detect by comparing with the threshhold. The simulation result shows that the method in the paper can detect the fault effectively.

关 键 词：傅立叶变换 逆变器 故障检测 

分 类 号：TP27[自动化与计算机技术—检测技术与自动化装置]