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标题：内燃有轨车辆永磁发电机温度场研究 |
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作者：康莉莉，姜东杰，孙树鑫，等 |
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| 2018年第11期 访问次数：229次 |
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摘要：发电机是内燃有轨车辆的重要组成部分，受安装空间和体积的限制，对发电机的散热冷却要求非常高。永磁发电机由于其功率密度高和效率高等优点而逐渐被应用在轨道行业。本文对一台560kVA内燃有轨车辆永磁发电机进行了电磁场、流体场及三维全域温度场分析。在电磁分析的基础上计算了电机各部件的损耗及生热率，对强迫风冷的电机机壳表面流体场进行了仿真分析，得到了额定转速下机壳表面各处的风速。在电机各元件的导热系数、散热系数和边界条件确定的基础上建立了热传导方程。运用三维有限元温度场分析软件对电机进行三维全域稳态温度场仿真分析，得到了发电机内部的温度场分布特点。上述计算仿真结果和实验数据基本吻合，为内燃有轨车辆永磁发电机的冷却设计提供了相关的工程理论依据。
关键词：内燃有轨车辆；永磁同步电机；电磁场；流体场；温度场
Abstract: The generator is an important component of rail vehicles with internal combustion. Due to the restriction of installation space and volume, request of cooling is very high. Permanent magnet synchronous motors(PMSM) are gradually applied in the track industry because of their advantages of high power density and high efficiency. Electromagnetic field, fluid field and threedimensional thermal field in global region of a 560 kVA permanent magnet synchronous generator(PMSG) for rail vehicles with internal combustion were analyzed in this paper, respectively. Losses and internal heat generation of different components were acquired on the basis of electromagnetic field analysis. Fluid field of the forced cooling process happening on the surface of motor shell was simulated and analyzed, and wind speed of different parts of motor shell surface at rated rotating speed were obtained. Heat conduction equations were established through the determination of coefficients of thermal conductivity, convection heat transfer coefficients and boundary conditions of different components of motor. Three-dimensional simulation analysis of steady-state thermal field in global region of the motor was accomplished through the use of software for 3D finite element method(FEM) of thermal field. And the distribution characteristics of thermal field in the motor were acquired. Results of analyses generally match the results of temperature rise experiment. Conclusions can be drawn to provide relevant engineering theoretical references for cooling mode design of permanent magnet synchronous generator for rail vehicles with internal combustion.
Key words: internal combustion rail vehicles; PMSM; electromagnetic field; fluid field; thermal field |
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