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首页> 外文会议>2015 International Conference on Electrical Systems for Aircraft, Railway Ship Propulsion and Road Vehicles >Influence of magnetic wedge on electromagnetic field distribution of permanent magent traction motor
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Influence of magnetic wedge on electromagnetic field distribution of permanent magent traction motor

机译：磁楔对永磁牵引电机电磁场分布的影响

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摘要

High-speed train permanent magnet traction motor stator slot installation with magnetic wedge, which can improve the air gap magnetic flux density waveform and reduce the harmonic component. However, in the process of high-speed train running, the motor vibration may cause magnetic wedge fall off, which will increase the air gap flux density harmonics. These harmonics will produce more eddy current losses on the rotor surface, thereby affecting the efficiency of the motor. Thus, this paper takes a 315kW permanent magnet synchronous motor as an example. It has established a mathematical model of two-dimensional transient electro-magnetic field prototype stator with non-magnetic wedge. By using time stepping finite element method for solving 2D electromagnetic field equation, the calculation results of the starting current and starting torque are compared with the experiment results to verify the accuracy of the calculation method. The paper investigates the impact on the motor performance by employing different relative permeability magnetic wedge during starting and normal operation. At the same time, this paper also discusses magnetic wedge falling off number and dropping position on the influence of air gap flux density harmonics, eddy current loss on rotor surface and motor efficiency.
机译：高速列车永磁牵引电动机定子槽安装有磁楔，可以改善气隙磁通密度波形并减少谐波分量。但是，在高速列车运行过程中，电动机的振动可能会导致磁楔脱落，从而增加气隙磁通密度谐波。这些谐波会在转子表面产生更多的涡流损耗，从而影响电动机的效率。因此，本文以315kW永磁同步电动机为例。建立了具有非磁楔的二维瞬变电磁原型定子的数学模型。通过采用时步有限元法求解二维电磁场方程，将起动电流和起动转矩的计算结果与实验结果进行比较，验证了该方法的准确性。本文通过在启动和正常运行期间采用不同的相对磁导率磁楔来研究对电动机性能的影响。同时，本文还讨论了磁楔的落下次数和落下位置对气隙磁通密度谐波，涡流损耗对转子表面和电动机效率的影响。

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