Permanent Magnetic Couplings available from jbj Techniques Limited

Magnetic Couplngs Operating Performance Power Part of the power transmitted by the electric motor is absorbed by the magnetic coupling due to three different reasons : eddy current, magnetic hysteresis and hydrodynamic resistance. Therefore is essential to know the fluid viscosity and the rpm in order to determine the magnetic coupling total efficiency. The following graphs represent the magnetic couplings GMDO compared in different working conditions. Power loss compared to the speed at viscosity o f 46cSt 0 500 1000 1500 2000 2500 3000 3500 4000 0 0,2 0,4 0,6 0,8 1 1,2 1,4 1,6 1,8 2 2,2 2,4 Power loss (kW) Speed (rpm) Gr1 2 Magnet rows Gr2 3 Magnet rows Gr.3 4 Magnet rows 0 500 1000 1500 2000 2500 3000 3500 4000 0 0,5 1 1,5 2 2,5 3 3,5 4 4,5 5 Power loss (kW) Speed (rpm) Gr.1 2 Magnet rows Gr2.3 Magnet rows Gr.3 4 Magnet rows 14 Power loss compared to the speed at viscosity o f 800cSt