Analysis and design of hybrid excitation linear eddy current brake

This paper presents a novel parallel magnetic path hybrid excitation linear eddy current brake. The eddy current brake using parallel magnetic path scheme with the presence of the PMs, whose flux lines in the primary are oppositely directed with respect to the flux lines by the excitation windings, has the effect of mitigating the saturation of the iron in the teeth of the primary. This allows the brake to be fed with more intense currents improving the braking force. The structure and working principle are introduced. The analytical model was found using the equivalent magnetic circuit method and the layer theory approach. The design method of the eddy current brake was studied using the finite element method. Compared with traditional induction motors and synchronous motors, the design method of the eddy current brake has not been proposed. Therefore, in this paper, the design parameters of the hybrid excitation linear eddy current brake were gradually determined by consulting the design method of the linear induction motor and linear synchronous motor, and a design flowchart was proposed. Finally, a prototype of hybrid excitation linear eddy current brake was created and an experimental study of the eddy current brake was conducted.