摘要
针对用于电动汽车的驱动电机,要获得较高的功率密度并提升可靠性,必须进行温升分析与控制.通过有限元仿真可以进行精确计算,但存在计算效率低、实时控制较难实现等缺点.为快速分析电机温度场分布情况,在满足精度要求的前提下,本文基于热阻网络法,根据电机结构选取了关键部件作为温度节点,建立了8节点热阻网络,分析计算了热容、热阻、热源和边界条件,建立了矩阵数学模型,最终通过编程获得了额定工况下电机温度场的瞬态变化特性.结合有限元仿真,验证了该结果具备较高的可靠性,并从热阻网络的角度对限制电机温升的方法提出了建议.
Thermal analysis and control for electric motor is essential when expecting high power density and reliability .Precise computation can be made via FEA analysis , while the method costs a lot of time .In this paper, according to the thermal network method , temperature nodes of some key components were selected to build an 8-node network , containing capacities , resistances , powers and boundary conditions , and a relevant mathematical model was programmed to show transient thermal performance .The result was verified by FEA sim-ulation and some suggestions were provided thereby .
出处
《佳木斯大学学报（自然科学版）》
CAS
2014年第2期187-190,共4页
Journal of Jiamusi University：Natural Science Edition
关键词
车用电机
热阻网络法
瞬态温度场
electric motor
thermal network
transient thermal analysis
