ANALYTICAL CALCULATION OF PERMANENT-MAGNET COUPLINGS

An analytical method adapted to calculating the forces between permane nt magnets is developped, and applied to torque calculation of synchro nous couplings. The method is based on the forces exerted between two elementary bar-shaped magnets. The curvature effect is taken into acco unt by a corrective coefficient, and the yokes by magnetic images. The method is relatively simple and gives accurate results which are very useful for optimization of the coupling shape.