Calculation of eddy current loss and thermal analysis for adjustable permanent magnetic coupler

Adjustable permanent magnetic coupler adopts a new type of magnetic circuit coupling principle, generates inductive magnetic field in copper collar surface by cutting magnetic induction lines, transmits torque by coupled action between inductive magnetic field and permanent magnetic field. Hence, it necessarily causes eddy current loss and heating problem. The paper builds the mathematical model of 3D sporting eddy current field according to the relevant theory of electromagnetism, employs the 3D finite element method to calculate eddy current field in copper collar region, then determines eddy current and eddy current loss in copper collar surface, finally, studies the influence of related design parameters on heat.