【作者】 邓云娟；

【导师】 卜庆华；

【作者基本信息】 太原理工大学 ， 电机与电器， 2003， 硕士

【摘要】 直线感应电机具有结构简单、成本低、耐用、便于维护等优点，是一种很重要的直线电机类型。本文对大圆环直线感应电机进行了深入细致研究，内容包括：(1)本文采用有限长行波面电流作用于有限长铁芯上的模型，引用了气隙磁场一维解，研究了单层绕组磁场，奇数极半填槽双层绕组在采用整距和短距时磁场的分析、比较，简单介绍了二维解；(2)用有限元软件Ansoft对大圆环直线感应电机空载气隙磁场进行了静态分析，并分析了结果；(3)用软件进行了额定电压下的瞬态分析，得到了转矩，位移，转速随时间变化曲线图，利用单极性霍尔元件测定转速并与软件计算结果进行了比较，采用等效电路法计算了堵转时的最大电磁力并做实验进行了验证，由实验测得了三相电流波形，并与计算结果进行了比较，对其不对称性进行了定性分析。更多还原

【Abstract】 Linear induction motor is an important kind of machines which have some merits such as simple structure, low cost, durability, convenience for maintenance etc. The subject of this thesis is to study a big circular ring linear induction motor, and the major works in this thesis are summarized as follows:(1) Considering the effects of the finite length of primary core, one-dimension analytical solution for the air gap field is cited in this paper. Based on it, the single layer winding magnetic field is studied. Considering whole-pitched and short-pitched winding configuration with odd poles and half-fulled slots in both ends, the double-layer winding magnetic field is analyzed, respectively. Besides, two-dimension analytical solution is also simply introduced.(2) A software of the Finite Element Method is employed to analyze the stationary magnetic field distribution in the air-gap of the motor and the calculable results are discussed.(3) The software of the Finite Element Method is also applied to calculate the transient behaviour of the motor under the rated voltage. The relations of torque, displacement, speed vs time are obtained, respectively. The speed is measured by a hall element and is compared with computation value. The maximum electromagnetic force during the rotor locked is obtained by the equivalent circuit method. The correctness of the presented method is verified by the experiments. Three-phase current waveforms are obtained by the experiments and are compared with computations, and its asymmetry about three-phase currents is analyzed.更多还原