3D Analytical Model to Compute the Electromagnetic Torque of Axial Flux Magnetic Coupler with A Rectangular-Shaped Magnet

This paper presents a three dimensional (3D) analytical model to compute the electromagnetic torque of axial magnetic coupling with rectangular-shaped permanent magnets (PM's). First, an analytical 3D model in Cartesian Coordinates for calculating the magnetic field distribution in magnetic coupling with sector PM's is developed. Then, we approximate the rectangular shape of PM with sector-shaped having the same area and thickness. The electromagnetic torque is computed using Maxwell's stress tensor. The model's validity has been verified by comparing the results calculated by the analytical model with those obtained from the 3D finite element method and measurements