混合动力车用制动电阻散热性能试验研究  

Experimental Research on Braking Resistor Heat Dissipation Performance of Hybrid Electric Vehicle

作　　者：孙晓霞[1] 王义春[2] 邵春鸣[1] 王国柱[1] 王璐[1] 

机构地区：[1]中国北方车辆研究所,北京10007 [2]北京理工大学机械与车辆学院,北京100081

出　　处：《车辆与动力技术》2015年第3期25-29,共5页Vehicle & Power Technology

摘　　要：通过混合动力车用制动电阻散热性能试验研究,分析了散热功率和迎面风速变化对制动电阻冷却空气出口温度和电阻表面温度的影响.结果表明：冷却空气出口温度和电阻表面温度随散热功率的增大而升高,随迎面风速的增大而降低;在大功率低流速阶段,迎面风速对制动电阻冷却空气出口温度和电阻表面温度的影响大于散热功率对其的影响.对试验数据点进行了不同功率下冷却空气出口温度和制动电阻表面温度随风速变化的工程用试验关联式拟合,所得关联式的误差范围为-2%∽2%.试验证明关联式可以很好地预测制动电阻在样车再生制动过程中的温度变化,保证整车的安全性和可靠性.According to the experimental research on braking resistor heat dissipation performance of hybrid electric vehicle, the influence of heat dissipation and frontal air velocity to the cooling air outlet temperature and resistor surface temperature of braking resistor is analyzed. The experimental results show that both the heat dissipation rate and the frontal air velocity have important effect on the cooling air outlet temperature and the braking resistor surface temperature. Both temperatures increase with as- cending of the heat dissipation rate and decrease with the arising of frontal air velocity. In the big heat dissipation rate and low speed stage, the effect of the frontal air velocity on the outlet temperature and surface temperature is more obvious than that of heat dissipation rate. The correlations of outlet temperature with wind velocity and resistor surface temperature with frontal air velocity in different heat dissipation rate are proposed. The uncertainties of the correlations are in the range of - 2% to 2%. According to the vehicle operating test, it is verified that the correlations can predict the temperature rising of the braking resistor effectively.

关 键 词：混合动力车辆 制动电阻 散热性能 

分 类 号：U469.7[机械工程—车辆工程] U463.523[交通运输工程—载运工具运用工程]