摘要
电机控制器作为纯电动汽车的控制核心,其散热性能直接影响到驱动系统的可靠性。以某MOS多管并联的电机控制器样机为研究对象,将原设计的光滑肋片替换为多齿肋片结构,以MOS管芯片温升和肋片散热器重量为评价指标,对原散热器结构进行改进设计,并进行CFD数值分析。结果表明,相对于原设计的光滑肋片,多齿肋片结构增加了对流散热的表面积和换热系数,使得肋片的散热能力得到了提升。通过改变肋片数量、小齿的几何尺寸及位置分布,在不高于原设计的芯片温升的前提下,最优设计方案的肋片散热器重量轻化了6.41%。
As the control core of the pure electric vehicle,the heat dissipation performance of the motor controller directly affects the reliability of the drive system.In this paper,a prototype motor controller with MOS multi-transistors parallel connection was taken as the research object,the original smooth fins was replaced with multi-pins fins structure,the temperature rise of MOS transistor chip and the weight of the fins were taken as the evaluation criteria,and the structure of the original radiator was improved and CFD numerical analysis was carried out.The results show that compared with the smooth fins,the multi-pins fins structure increases the surface area and heat transfer coefficient of convection heat dissipation,and the heat dissipation capacity of the fins is improved.By changing the number of fins,the geometric size and the position distribution of the pins,the weight of the optimal design of the fins is reduced by 6.41%under the premise that the temperature of the chip is no higher than the original structure.
作者
陈亮
张超
宋蔚
鞠鹏飞
CHEN Liang;ZHANG Chao;SNG Wei;JU Pengfei(Tianjin Key Laboratory for Advanced Mechatronic System Design and Intelligent Control,School of Mechanical Engineering,Tianjin University of Technology,Tianjin 300384,China;National Demonstration Center for Experimental Mechanical and Electrical Engineering Education,Tianjin University of Technology,Tianjin 300384,China;China Automotive Research(Tianjin)Automotive Engineering Research Institute Co.,Ltd.,Tianjin 300300,China)
出处
《计算机仿真》
北大核心
2021年第1期98-101,106,共5页
Computer Simulation
基金
天津市自然科学基金(青年项目)(18JCQNJC07200)
天津市科技计划项目文中若有基金项目(17YFZCSF01240)。
关键词
电动汽车
散热器
多齿肋片
温升
轻量化
Electric vehicle
Heat sink
Multi-pins fin
Thermal transfer performance
Lightweight
