Eddy Current- and Friction Brake Fusion by a Disc-Spring to a Hybrid- Brake

This paper shows the concept and design method of a hybrid brake. The magnetic attraction force between rotor and stator of an eddy current brake can be used to generate an additional mechanical friction torque. By using a disc spring between rotor and stator, the eddy current brake is extended to a so-called hybrid brake. In particular, the design method of the disc spring is the focus of this work. Using a system model that includes the electromagnetic and mechanical domains, the wear reduction compared to a conventional friction brake and the dynamic behavior depending on the spring parameters are investigated. Finally, a disc spring is designed in FEM with the desired force-displacement curve.