基于场路耦合的牵引用直线感应电机温度场分析
薛雍鹏1王淑红1吴攀2柴景棠1
Temperature Field Analysis of Traction Linear Induction Motors Based on Field-circuit Coupling
XUE Yongpeng1WANG Shuhong1WU Pan2CHAI Jingtang1
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作者信息:1.太原理工大学电气与动力工程学院，030024，太原
2.国网山西省电力公司电力科学研究院，030001，太原
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Affiliation:1.School of Electrical and Power Engineering, Taiyuan University of Technology, 030024, Taiyuan, China
2.Shanxi Electric Power Science Research Institute, 030001, Taiyuan, China
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关键词:
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Key words:
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DOI:10.16037/j.1007-869x.2025.03.026
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中图分类号/CLCN:U231.8
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栏目/Col:研究报告
摘要:
［目的］城市轨道交通中直线感应电机因初级铁心开断、端部半填充，以及端部效应的影响，给其电磁性能分析、控制策略公式推导、各部件损耗计算以及温度场分析带来困难，实际工程中电机运行多结合控制系统，必须解决城市轨道交通驱动系统中直线感应电机在运行中温度场分析的困难问题。［方法］使用多仿真平台联合搭建了考虑横向和纵向端部效应的直线感应电机矢量控制系统场路耦合仿真模型，建立了一台12kW直线感应电机的三维流固耦合温度场和有限元电磁仿真模型。采用有限体积法对该电机的流体场和温度场进行耦合分析，利用冰冻转子法，综合考虑了周围环境中空气流体和动子运动对电机稳态温升的影响。［结果及结论］通过样机的开环运行试验验证了该方法的准确性。在此基础上，结合仿真结果得出了该样机在矢量控制系统下不同牵引工况的运行性能，在给定速度下均可快速响应并达到稳定，控制效果较好。基于损耗曲线计算求得各部件的热源，进一步得出样机的温度场分布，可直观看出空气流体对温度分布的综合影响。
Abstracts:
［Objective］ In urban rail transit systems, the analysis of LIM (linear induction) faces challenges due to factors such as primary core discontinuity, partial filling of the end region, and end effects. These factors complicate the analysis of electromagnetic performance, derivation of control strategy formulas, calculation of component losses, and temperature field analysis. In practical engineering applications, LIMs typically operate in conjunction with control systems, necessitating solutions to the complex problem of temperature field analysis in LIMs used in urban rail transit drive systems. ［Method］ A field-circuit coupling simulation model for an LIM vector control system is jointly built by using multiple simulation platforms, considering both transverse and longitudinal end effects. A 12 kW LIM is modeled using 3D fluid-solid coupling temperature field and finite element electromagnetic simulation methods. The finite volume method is employed for coupling the motor′s fluid and temperature fields, and the frozen rotor method is applied to account for the effects of surrounding air flow and rotor motion on the steady-state temperature rise of the motor. ［Result & Conclusion］ The accuracy of the proposed method is validated through open-loop operation experiments on a prototype. Based on the simulation results, the performance of the prototype under different traction conditions with the vector control system is analyzed. The motor exhibits fast response and stability at given speeds, demonstrating effective control. By calculating heat sources from loss curves, the temperature field distribution of the prototype is determined, providing a clear visualization of the combined effects of air flow on temperature distribution.
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