Characteristic Analysis of a Permanent Magnet Eddy-Current Brake Under Strong Impact Load

This paper addresses the braking characteristics of a permanent magnet eddy-current brake under strong impact load. The acceleration of the eddy current brake (ECB) will be very large under the action of strong impact load. It is observed that the braking force characteristics of the ECB in high acceleration are different from those under quasi-static condition. That is, braking force is no longer a single function of velocity. At first, the quasi-static analytical model is established by solving boundary value problems using Fourier series. And then the accuracy of the quasi-static analytical model and the two-dimensional finite element model (FEM) is verified by comparing the results of the two models. Finally, the braking force characteristics of eddy-current brake under strong impact load and the influence of related factors on its braking force characteristics are analyzed using the FEM to provide valuable information for the design of this kind of ECB.