CAJ | 학술논문

非正弦供电下多相电动机的磁动势与磁通密度分析表明,注入一定的3次谐波励磁电流有利于提高电动机铁磁材料的利用率和增加电动机的输出转矩。据此推导了考虑基波与3次谐波共同作用时的十五相感应电动机数学模型,通过三维插值实现了计及基波和3次谐波共同作用下的主磁路饱和因素,并在PSCAD/EMTDC平台中建立了相应的仿真模型。仿真与实验结果的一致性表明了建模方法的正确性,该模型的建立为非正弦供电方式下的多相感应电动机优化设计、运行性能分析等提供了理论基础。
비정현공전하다상전동궤적자동세여자통밀도분석표명,주입일정적3차해파려자전류유리우제고전동궤철자재료적이용솔화증가전동궤적수출전구。거차추도료고필기파여3차해파공동작용시적십오상감응전동궤수학모형,통과삼유삽치실현료계급기파화3차해파공동작용하적주자로포화인소,병재PSCAD/EMTDC평태중건립료상응적방진모형。방진여실험결과적일치성표명료건모방법적정학성,해모형적건립위비정현공전방식하적다상감응전동궤우화설계、운행성능분석등제공료이론기출。
The improvement of utilization percent of ferromagnetic material and output torque can be obtained by injecting some third harmonic exciting currents,according to the analysis of magneto motive force and air-gap magnetic field density of multiphase induction motor under the non-sinusoidal supply.Mathematical model of fifteen-phase induction motor under fundamental and third harmonic components is deduced,and simulation model of system is shown in the EMTDC library. The results of simulation and experiments are identical,and the firm groundwork is laid for researching the optimization design and the analysis of performance and stability for multiphase induction motors under the non-sinusoidal supply.