| Synchronous magnetic coupler is a new technology based on the principle of electromagnetic induction and modern magnetic theory.Its working principle is to use the magnetic force of permanent magnetic material to achieve non-contact transmission of force or torque,realizing the transformation from traditional mechanical dynamic seal to static seal and achieving complete leak-free.Its active and driven parts are completely separated without mechanical connection,which solves the problems of overload protection,soft start and main and driven shaft alignment during operation and installation,and is widely used in power equipment in petroleum,electric power,food,pharmaceutical and other industries.In this paper,the development history of magnetic coupler is firstly described,and the working principle and structural characteristics of magnetic coupler are introduced.Secondly,the mathematical model for calculating the magnetic field,magnetic torque and eddy current loss of the cylindrical magnetic coupler is established,and the formulae for calculating the magnetic field distribution,magnetic torque and eddy current loss in the air gap of the magnetic coupler are analyzed and derived.Then Maxwell simulation software is used to construct the twodimensional and three-dimensional models of the cylindrical magnetic coupler respectively,to obtain the magnetic field distribution in the motion cycle,to calculate and analyze its magnetic torque and eddy current loss,and to study the change law of the magnetic coupler torque and eddy current when different structural parameters are changed.Finally,the softstart process of the magnetic coupler under constant torque load is simulated,and the operation of the magnetic coupler after encountering a shock load during stable operation is further investigated. |
PDF Full Text Request