Results of a comparative experimental investigation of various media for noninvasive diagnostics of rotor faults in induction motors are presented. Stator voltage and current in an induction motor were recorded and employed for computation of the partial and total input powers, and the estimated torque. Waveforms of the current, partial powers p/sub ab/ and p/sub cb/, total power, and estimated torque were next subjected to the fast Fourier transformation. Rotor cage faults of increasing severity were imposed, and the motor was operated with various load levels. The partial input power p/sub cb/ referred to its DC component turned out to have the highest sensitivity to faults. This medium is also most reliable, owing to the multiplicity of fault-induced spectral components.
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机译：提出了一种对诱导电动机转子故障非侵入性诊断的各种培养基的比较实验研究。记录并采用感应电动机中的定子电压和电流用于计算部分和总输入功率，以及估计的扭矩。接下来对电流，部分功率P / Sub / Sub /，总功率和估计扭矩的波形进行了快速的傅里叶变换。施加了严重程度的转子笼故障，并且电动机以各种负载水平运行。结果部分输入功率P / SUB CB /引用其DC分量对故障具有最高的敏感性。由于多重诱导的光谱分量，该介质也是最可靠的。
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