Change in torque transmitted by a standard magnetic coupling with the same overall dimensions, depending on the grade of permanent magnet and its dimensions

The possibility of changing the torque transmitted by a cylindrical magnetic coupling, depending on the brand of a high-coercive permanent magnet — neodymium— iron—boron, samarium—cobalt is considered. Using the example of standard magnetic couplings with a diameter of 133 mm for magnets and air gaps between the half couplings for magnets of 5 and 7 mm, the change in the torque transmitted by the magnetic coupling without changing its overall dimensions is shown. Varying the torque of the magnetic coupling is possible by changing the shape, size and grade of permanent magnets while keeping the same number of magnets in each of the half-couplings of the magnetic coupling constant. Keywords; magnetic coupling, permanent magnet, number of magnets. [email protected]

Highly efficient perturbative + variational strategy based on orthogonal valence bond theory for the evaluation of magnetic coupling constants. Application to the trinuclear Cu(ii) site of multicopper oxidases

A new perturbative + variational strategy: a low-cost, quantitative and rational evaluation of the magnetic coupling constant in complex systems.

Intra-molecular magnetic exchange interaction in the tripyridinium bis[tetrachloroferrate(iii)] chloride molecular magnet: a broken symmetry-DFT study

A superexchange interaction path between Fe–Fe in (FeCl4)2(py·H)3Cl is illustrated making use of electronic spin density maps (ESDM) and the magnetic coupling constant is calculated using the BS-DFT method as JFe–Fe = 13.2062 kJ mol−1.