封闭式小型异步电机的温度场研究

发布时间：2018-03-28 02:40

本文选题：电磁仿真　切入点：有限元　出处：《河南理工大学》2014年硕士论文

【摘要】：本文以小型封闭式异步电机为研究对象,从电机的热源及电机散热结构出发,通过研究电机的损耗及电机各部分的相关热参数,建立了电机电磁和温度场有限元仿真计算模型并搭建实验平台研究了电机稳态和瞬态的温升问题。电机的热源主要来自电机的电磁损耗,本文从理论上分析了电机的铁耗和铜耗以及机械损耗等,并通过有限元分析软件MagNet仿真计算了电机定转子的铜耗和铁耗及各部分损耗的分布等;电机的散热结构及环境因素决定了电机的散热,根据传热学和流体力学等理论,本文重点研究了电机定子槽部的导热系数、2D有限元分析中电机的表面散热系数及定转子的对流系数等。文中对一台型号为Y100L1-4的三相笼型异步电动机进行了电磁和温度场的仿真计算及实验对比分析。仿真主要是基于有限元电磁仿真软件MagNet和热分析软件ThermNet,首先做一些适当的假设建立电机的二维电磁仿真模型,通过MagNet对电机进行电磁仿真,从而计算出电机各部分的电磁损耗及分布,然后作为ThermNet仿真的热源,在设置了电机的热性能参数及边界条件的基础上进行电磁-热耦合仿真。最后通过温度场的仿真结果分析电机稳态及瞬态的温升情况。实验方面主要是要测量与电机温度场有关的热源的大小及电机稳态、瞬态的电机温升情况,通过实验验证数学模型及仿真计算中各热性能参数及边界条件设置的合理性,另外对于电机的转子的温升很难测量,本文提出了一种拟合的方法求电机转子的稳态温度。
[Abstract]:In this paper, a small enclosed asynchronous motor as the research object, starting from the motor and motor heat dissipation structure, and heat loss through different parts of motor parameters on the motor, the calculation model and the experimental platform is built to study the motor steady-state and transient motor electromagnetic and temperature field finite element simulation of the temperature rise of the electromagnetic loss. The motor main heat source from the motor, this paper analyzes the motor iron loss and copper loss and mechanical loss in theory, and the calculation of the motor rotor copper loss and iron loss and the loss distribution by finite element analysis software MagNet simulation; motor cooling structure and environmental factors of the motor according to the heat, heat transfer and fluid mechanics theory, this paper focuses on the thermal conductivity of the motor stator slot, surface heat transfer coefficient 2D finite element analysis of the motor and the rotor of the Flow coefficient. In this paper, a model for the three-phase squirrel cage asynchronous motor Y100L1-4 is analyzed and the electromagnetic simulation of temperature field calculation and comparison with experimental results. The simulation is mainly the analysis of finite element electromagnetic simulation software MagNet and ThermNet software based on the heat, first do some appropriate assumptions to establish two-dimensional electromagnetic motor simulation model, through the MagNet electromagnetic simulation of the motor, so as to calculate the electromagnetic loss and distribution of each part of the motor, and then as a source of ThermNet simulation, simulation of electromagnetic - thermal coupling based on set thermal parameters and boundary conditions of the motor. Finally through the simulation results of temperature field analysis of steady and transient motor temperature rise. The experiment is mainly to measure the temperature field of the motor and the heat source and the size of the motor steady-state, transient motor temperature rise, through the model and the simulation experiment of Mathematics The rationality of setting up the thermal performance parameters and the boundary conditions in the calculation is also reasonable. In addition, it is difficult to measure the temperature rise of the rotor of the motor. In this paper, a fitting method is proposed to calculate the steady-state temperature of the rotor of the motor.

【学位授予单位】：河南理工大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM343

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