基于MIRPSA的感应电动机转子断条数目诊断判据

A MIRPSA-based criterion to quantify broken rotor bars in induction motors

在感应电动机转子断条数目诊断方面,电机定子电流信号分析(MCSA)类方法已经建立明确的解析判据,而电机瞬时无功功率信号分析(MIRPSA)类方法缺乏理论支撑。为此,针对转子断条故障推导了感应电动机瞬时无功功率特征分量的幅值与转子断条数目间的数值对应关系,由此建立了具有解析意义的基于MIRPSA的转子断条数目诊断判据。感应电动机转子断条故障仿真与实验证明了所提判据的有效性。

In the diagnosis of broken rotor bars in induction motors,the methods based on MCSA(Motor Current Signal Analysis) have established explicit criterions,while the methods based on MIRPSA(Motor Instantaneous Reactive Power Signal Analysis) lack theoretical support. Therefore,the numerical relationship between the magnitude of the feature component of instantaneous reactive power and the number of broken rotor bars is deduced,based on which,a diagnostic criterion to quantify the broken rotor bars based on MIRPSA is analytically established. The numerical simulation and laboratory experiment verify the effectiveness of the proposed criterion.