长初级双边直线感应电机纵向动态端部效应第一部分:气隙磁场

发布时间：2018-06-21 22:53

本文选题：直线感应电机 + 长初级　；参考：《电机与控制学报》2014年04期

【摘要】：为了研究纵向动态端部效应对长初级直线感应电机磁场和性能的影响,建立并求解了长初级直线感应电机考虑纵向动态端部效应时的一维时谐磁场方程,分别给出了基本行波、入端行波和出端行波气隙磁密的解析表达式,分析了3种行波磁场幅值、相位和波形的特性,以及端部效应行波对气隙磁场分布的影响,通过二维有限元数值计算验证了气隙磁密解析解的正确性。给出了衰减常数、半波长和波速等端部效应特征参数随品质因数的变化规律。分析结果表明,长初级与短初级结构的气隙磁场分布存在较大差异,当电机在高速运行时更为明显。调整电机设计参数以减小品质因数可以有效地削弱纵向动态端部效应,但这些方法也会降低电机的正常运行性能,在电机设计时应综合考虑。
[Abstract]:In order to study the effect of longitudinal dynamic end effect on magnetic field and performance of long primary linear induction motor, the one-dimensional time-harmonic magnetic field equation of long primary linear induction motor considering longitudinal dynamic end effect is established and solved, and the basic traveling waves are given respectively. The analytical expressions of the air gap magnetic density of the inbound and outbound traveling waves are analyzed. The amplitude, phase and waveform characteristics of the three traveling waves and the effect of the traveling waves on the distribution of the air gap magnetic field are analyzed. The validity of the analytical solution of air gap magnetic density is verified by two-dimensional finite element numerical calculation. The characteristic parameters of the end effect such as attenuation constant, half wavelength and wave velocity are given. The results show that the air gap magnetic field distribution of long primary structure and short primary structure is quite different, especially when the motor is running at high speed. Adjusting the design parameters of the motor to reduce the quality factor can effectively weaken the longitudinal dynamic end effect, but these methods can also reduce the normal operation performance of the motor, which should be considered comprehensively in the design of the motor.
【作者单位】：北京航天控制仪器研究所;华中科技大学电气与电子工程学院;
【分类号】：TM346

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