汽车驱动桥传动效率试验台的研制及测试

研发了一种专门用于汽车驱动桥传动效率测试的试验台。使用该试验台进行测试分析，可以明确影响驱动桥传动效率的关键因素，发现各因素对驱动桥传动效率的影响规律，从而找到提高驱动桥传动效率的有效途径，这对于提高汽车动力性和燃油经济性具有十分重要的意义。该试验台采用模块化结构设计,具有安装简便、调整方便、自动化程度高的特点。该试验台采用直接转矩控制来进行转矩和转速控制，利用谐波传动和行星传动技术实现了动态加载，利用直流母线技术实现了系统功率封闭。测试结果表明:该试验台测试结果准确，完全满足驱动桥传动效率的测试要求。

Development and Testing of Test Bench for Transmission Efficiency of Automobile Drive Axle

A test bench was developed for transmission efficiency testing. With this test bench, the key factors that had impacts on the transmission efficiency of automobile drive axle could be found, the influence regularity of these factors on the transmission efficiency could be determined, and finally, an effective method to improve transmission efficiency was proposed, which had very important significance to improve the dynamic performance and fuel economy of automobile. Adopting the modularization design, the test bench has the advantages of quick installation, convenient operation and high automation degree. The torque and speed controls of the test bench were achieved through direct torque control, dynamic loading was realized through harmonic drive and planetary transmission, and system energy feedback was  brought to a reality through DC bus technology. The practice indicates that the control precision of the test bench has achieved the anticipated target.