Calculation of the Eddy Current Loss and Braking Characteristic Analysis of the Eddy Current Brake

摘要

The eddy current brakes are operated at various speeds when the vehicle is braking. In order to increase the eddy current loss, drum is composed of iron with conductivity. As a result, the eddy current brake exhibits a skin effect and an armature reaction phenomenon, and the skin depth and the air-gap flux density vary depending on the braking speed. In this paper, the eddy current loss equation of the eddy current brake with a copper coating inside the drum is newly presented and compared with the finite element analysis (FEA) results. Also, the change of the speed-torque curve according to the conductivity value of drum and inner coating material are shown. Finally, a prototype experiment was conducted to compare and verify the characteristic curve of the eddy current brake obtained from the newly derived equations.