Permanent magnetic couplings for mechanical power transmission

Magnetic Couplngs Data Required for Specification There is minor power loss using the GMDO magnetic coupling. There are three reason for this; eddy currents, magnetic hysteresis and hydrodynamic resistance. The eddy current and the magnetic hysteresis is only a minimal part of this power absorption. The third consideration, the resistence, depends on the medium used within the pump, and from the moment when the internal rotor is immersed in the medium. Therefore it is important to establish the viscosity of the medium and the operational speed to determine the main power of the magnetic coupling. Min. temperature . . . . . [°C] Nominal operational speed . . . . . [min-1] Start ( soft or direct ) . . . . . Max. pressure inlet port pump . . . . . [bar] Pump medium Maximum pressure into the containment shroud . . . . . bar Fluid/Gas Electric Motor Maximum torque (continuous rating S1) . . . . . [Nm] Pump type Input rating (continuous rating S1) . . . . . [Kw] Max. displacement . . . . . [cm3/rev] Max. temperature . . . . . [°C] Technical data required to specify correct coupling size Number of poles . . . . . Max. displacement at max. pressure ( only for variable displacement pumps ) . . . . . [cm3/rev] Max. pressure outlet port pump . . . . . [bar] Max. pressure at min. variable stroke ( only for variable displacement pumps ) . . . . . [bar] Min. viscosity pump medium . . . . . [cSt] Max. viscosity . . . . . [cSt] Dimensional characteristics of the driving side . . . . . Driver Side Power in S1 conditions . . . . . kW Number of poles . . . . . speed . . . . . rpm Maximum torque . . . . . with or without soft start inverter Driven Side Dimensional characteristic of the driven side . . . . . Mounting position . . . . . horizontal or vertical Fluid or gas type . . . . . Minimum temperature . . . . . °C Maximum temperature . . . . . °C Minimum viscosity . . . . . cSt Maximum viscosity . . . . . cSt Ambient Maximum temperature . . . . . °C Minimum temperature . . . . . °C 8 www.jbj.co.uk/magnetic-couplings.html #DriveLineHarmony