A Timesaving Transient Magneto-Thermal Coupling Model for the Eddy Current Brake
Jinshan Tian, Desheng Li, Keyan Ning, Lezhi Ye
Abstract
Eddy current brakes (ECB) are widely installed on heavy-duty vehicles to improve driving safety and economy. When the ECB works, the mechanical energy of the vehicle is converted into thermal energy under the action of the electromagnetic field, which is a process of mutual influence between the electromagnetic field and temperature field, and this process can be simulated by establishing a transient Magneto-thermal coupling model with bidirectional data transmission. However, due to the long calculation time required for accurate 3D electromagnetic analysis, the above model must be simplified. The parameter sensitivity analysis of the ECB shows that the temperature of the eddy current generating location directly affects the braking torque. Through the 3D electromagnetic field numerical analysis, the mapping relationship between the temperature of the eddy current generating layer and the braking torque is established and brought into the transient heat transfer model. The finite difference method is used to calculate the heat transfer model. The calculation results can predict and analyze the braking performance of the ECB during its working process.