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Magnetic Field Analysis of Linear Motor for High-Speed Maglev Train

One of the main sources of the low-frequency magnetic field of the high-speed maglev train is the magnetic field generated by the linear motor. To study the magnetic field generated by the linear motor used in the Shanghai high-speed maglev train, first of all, this paper establishes a two-dimensional analytical model of linear motor to calculate the air gap magnetic field under operation current, then, the electromagnetic simulation of the linear motor was carried out through ANSYS Maxwell. Through the comparison of the two results, the results were consistent. Otherwise, the three-dimensional model of the train and the motor is established on the basis of the two-dimensional model. Secondly, the harmonic field has a great influence on the signal sensing equipment, so it is necessary to use ANSYS Simplorer to analyze the harmonics of the traction power supply system. Finally, the overall magnetic field generated by the linear motor is obtained by the joint simulation of Simplorer and Maxwell.