Method for maintaining e.g. axial magnetic coupling, connecting elements in operating range in chemical industry, involves selecting rows of permanent magnets corresponding to sinusoidal function and successively arranging magnets on rotors

摘要

The method involves determining a curve giving torque values according to a relative offset angle between an internal rotor (2) and another internal rotor, and approximating a portion of the curve corresponding to an operating range by a series of sinusoidal functions presenting amplitudes, periods and phase shifts. A pair of rows (6, 6a, 6b) of permanent magnets (4, 4a, 4b) corresponding to the sinusoidal function is selected for each sinusoidal function. The pair of rows of the selected magnets is successively arranged on the rotors. An independent claim is also included for a magnetic coupling comprising a driving rotor and driven rotor.