基于定子电流信号和噪声信号的异步电动机转子断条故障诊断  

Fault Diagnosis of Broken Rotor Bars of Asynchronous Motors Based on Stator Winding Signal Current and Noise Signal

作　　者：魏闻达 陈德智[1] 侯新贵 胡苏筠 胡文明 张栋 

机构地区：[1]华中科技大学强电磁工程与新技术国家重点实验室,湖北武汉430074 [2]徐州供电公司,江苏徐州221005 [3]南京工程学院电力工程学院,江苏南京211167

出　　处：《电机与控制应用》2015年第6期69-72,共4页Electric machines & control application

基　　金：国家自然科学基金资助项目(51177054)

摘　　要：给出了异步电动机发生转子断条故障时的磁动势的表达式,得出基于定子电流信号的转子断条故障诊断方法。以磁动势表达式为基础,进而推导出发生断条故障时的径向力表达式,并提出了一种全新的基于径向力频谱分析的转子断条故障诊断方法,即通过检测径向力频谱图中的(2-4s)f1、(4-4s)f1、(6-4s)f1谐波分量来诊断异步电动机的断条故障。有限元仿真的结果验证了上述结论。The expression of magneto-motive forces （MMFs） of asynchronous motors when having broken rotor bars fault was given, then the diagnosis method based on detecting stator winding currents was induced. Secondly, based on the expression of MMFs, the expression of radical forces under broken rotor bars was derived. Then, a new diagnosis method based on radical force spectrum of broken rotor bars fault was proposed. This method used （2 -4s） fl , （4 -4s）fl and （6 -4s）fj harmonic components of radical force spectrum to diagnose broken rotor bars fault of induction motors. Results of Finite Element Analysis validated the above conclusions.

关 键 词：异步电动机 转子断条 故障诊断 径向力 频谱分析 

分 类 号：TM307[电气工程—电机]