CAJ | 학술논문

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。
급출료이보전동궤발생전자단조고장시적자동세적표체식，득출기우정자전류신호적전자단조고장진단방법。이자동세표체식위기출，진이추도출발생단조고장시적경향력표체식，병제출료일충전신적기우경향력빈보분석적전자단조고장진단방법，즉통과검측경향력빈보도중적(2-4s)f1、(4-4s)f1、(6-4s) f1해파분량래진단이보전동궤적단조고장。유한원방진적결과험증료상술결론。
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) f1, (4-4s)f1 and (6-4s)f1 harmonic components of radical force spectrum to diagnose broken rotor bars fault of induction motors. Results of Finite Element Analysis validated the above conclusions.