A Novel MMF Distribution Model for 3-D Analysis of Linear Induction Motor With Asymmetric Cap-Secondary for Metro

作者：Lv, Gang^*; Zeng, Dihui; Zhou, Tong

来源：IEEE Transactions on Magnetics, 2017, 53(9): 8107907.

DOI：10.1109/TMAG.2017.2711560

• Asymmetric secondary
• cap-secondary
• lateral force
• linear induction motors
• magnetomotive forces (mmf) distribution
• secondary overhang
• space harmonic method
• thrust
• vertical force.

This paper develops a novel magnetomotive forces (mmfs) distribution model along the transverse direction for the 3-D analysis of linear induction motor, and it investigates the influence of a laterally asymmetric cap-secondary on the thrust, vertical force, lateral force, and efficiency in a prototype single-sided linear induction motor for linear metro. First, the mmf distribution model and its working conditions are defined, and the model is transferred into a mathematical model. Second, the air-gap flux and secondary eddy current in a prototype linear motor with a cap-secondary are obtained by a 3-D space harmonic analytical method. Third, the thrust, vertical force, lateral force, and efficiency of the test motor are analyzed with various lateral deflection, and the power factor in secondary is also presented. Finally, these results are experimentally verified by measurements on the test rig of the linear motor, and the comprehensive effect on the operating performance can be accurately calculated by the mmf model.

• 出版日期2017-9
• 单位北京交通大学