Torque characteristic analysis of slotted disk magnetic couplers
YANG Chaojun
WANG Kaixuan
GUO Yafei
ZHU Zhicheng
Abstract：[Objective]For slotted disk magnetic couplers,the slotted conductor disk complicates the magnetic circuit during operation,increasing the difficulty of calculating electromagnetic torque.A reliable electromagnetic torque prediction model was established,and its torque characteristics were studied.[Methods]A 18-pole 16-slot disk magnetic coupler was studied.Firstly,via the equivalent magnetic circuit method,induced eddy currents from adjacent and self-magnetic circuits were introduced as a branch into a new model.Considering 3D end effects and combining Ampere's and Kirchhoff's laws,air gap flux and output torque expressions were derived.Secondly,the coupler was simulated and analyzed by the finite element simulation software,obtaining distributions of air gap magnetic field and eddy currents,and torque variations with air gap thickness and speed difference under adjacent eddy current influence.Finally,a test platform was established to verify theoretical and simulation results.[Results]The results show that the results of theoretical calculation,finite element simulation and test are basically consistent.The proposed theoretical model has high accuracy,providing a reliable prediction model for studying the torque performance of such couplers.
Keywords：Slotted disk magnetic couplerEquivalent magnetic circuit methodOutput torqueNeighboring eddy currentAir-gap magnetic field
Publication Date：2026-01-15
Online Publishing Date：2026-09-12(First online date of this platform, not the publication date of the document)
Pages：8( 1-8 )