Study on temperature rise performance of eddy current retarder in automobile

摘要

Good brake performance is an important guarantee for safe driving of vehicles. With the increase in vehicle weight and running speed the main braking system can not meet heavy vehicles and large passenger driven in the mountainous area and on long downhill requirements. Their brake load must be split flow by auxiliary brake set on continuous braking course, only in this way heat fading of main braking system can be avoided, and eddy current retarder is one of auxiliary brake sets. Heat energy that mechanical energy is converted into by electromagnetic field will make temperature rise in the rotor. According to conservation of energy principle and ECE R13 legislation temperature rise equation is derived on the rotor of eddy current retarder in this paper, and braking torque and temperature rise characteristics of eddy current retarder are researched by drum test and bed test. A shortcoming of electronic control temperature rise method is pointed out, and a new approach to solve above question is put forward.