考虑笼型转子实际结构的感应电动机建模研究

根据交流电机多回路理论,通过把传统的Park变换方法推广到面向转子侧的多相系统,提出了考虑笼型转子实际结构的感应电动机模型,并基于EMTP环境实现了该模型.本文提出的模型能够对电动机的正常运行、外部故障以及笼型转子导条或端环断裂故障进行精确的仿真.既可以用来探求笼型转子故障后各个电气量和机械量的变化规律,作为电动机故障诊断和保护研究的工具;也可以用来进行用电机实验方法无法完成的笼型转子导条或端环断裂后导条或端环电流变化情况的研究,为电机设计制造部门提供参考.仿真与实验结果证明了模型的精确性和有效性,经进一步完善该模型可作为EMTP的一个功能模块使用,具有良好的应用前景.

Study on the Induction Motor Modeling Considering Squirrel Cage Rotor Real Structure

Based on the multi-loop theory and the extended Parks transformation method given in this paper, a new induction motor model considering squirrel cage rotor real structure is presented and the model is implemented in electromagnetic transient program (EMTP). Because the squirrel cage rotor real structure is considered, the model can be used to simulate the motors normal state, external faults and broken bars and rings faults exactly. The model can be used as a powerful tool to analyze the effect of broken bars and rings faults to induction motor performances and the bars and rings current status to supply references to induction motor protection and design. Simulations and experiments show the precision and effectiveness of the model. It can be used as a module of EMTP after further improvement.