基于Icepak的电助力自行车中置电机塑料齿轮温度仿真分析  

Simulation Analysis of Plastic Gear Temperature of the Drive Unit of E-bike Based on Icepak

作　　者：吴振宏 张秋阳 Wu Zhenhong;Zhang Qiuyang(School of Mechanical and Automotive Engineering,South China University of Technology,Guangzhou 510641,China;Guangdong Gobao Intelligent Technology Co.,Ltd.,Dongguan,Guangdong 523808,China)

机构地区：[1]华南理工大学机械与汽车工程学院,广州510641 [2]广东高标智能科技股份有限公司,广东东莞523808

出　　处：《机电工程技术》2025年第4期100-105,共6页Mechanical & Electrical Engineering Technology

基　　金：东莞市松山湖高新区硕博士联合培养项目。

摘　　要：电助力自行车中置电机内部的高热流密度问题可能导致热敏材料的塑料齿轮受热失效,从而降低产品使用寿命,因此亟需相应的热管理系统保护塑料齿轮,为了完善针对塑料齿轮的热管理系统,首先要对塑料齿轮进行精准的实时温度预测。以某典型工况为例,利用Icepak仿真研究了内部电路板及减速传动系统的温度分布,并与部分器件的实测温度对比验证仿真的有效性;在此基础上进行多次仿真,得到不同工况下的塑料齿轮稳态温度;以传热学理论为基础,结合多次仿真的数据,拟合出适用于塑料齿轮的温度预测表达式。结果表明:仿真结果足够可靠,最大误差为4.38%;得出了实验室条件下塑料齿轮稳态温度关于转速和扭矩的表达式,且在变工况下测试的预测误差在±5℃以内;与传统的集总参数法相比节省大量建模与计算时间,可应用于工程上需要对塑料齿轮进行快速准确温度预测的场景。The problem of high heat flux density inside the drive unit of e-bike may lead to the failure of the plastic gear of heat-sensitive materials,thereby reducing the service life of the product,so it is urgent to protect the plastic gear with a corresponding thermal management system,and in order to improve the thermal management system for the plastic gear,it is necessary to accurately predict the real-time temperature of the plastic gear first.Taking a typical working condition as an example,the temperature distribution of the internal circuit board and the deceleration transmission system is studied by using Icepak simulation,and the effectiveness of the simulation is verified by comparing with the measured temperature of some devices.On this basis,multiple simulations are carried out to obtain the steady-state temperature of the plastic gear under different working conditions.Based on the theory of heat transfer and combined with the data of multiple simulations,the temperature prediction expression suitable for plastic gears is fitted.The results show that the simulation results are reliable enough,and the maximum error is 4.38%.The expression of the steady-state temperature of the plastic gear on the speed and torque under laboratory conditions is obtained,and the prediction error of the test under variable conditions is within±5℃.Compared with the traditional lumped parameter method,it saves a lot of modeling and calculation time,and can be applied to engineering scenarios that require fast and accurate temperature prediction of plastic gears.

关 键 词：电助力自行车 中置电机 塑料齿轮 温度仿真 热管理系统 

分 类 号：TH132.41[机械工程—机械制造及自动化]