Parker Hannifin / Automation / Electromechanical Division - Europe STK Series 500STK2M

Continuous torque from 14 Nm to 2700 Nm with natural convection (according to size), and up to 6100 Nm with fluid cooling. Six external diameters from 145 mm to 800 mm. Internal diameters from 56 mm to 630 mm. Various windings available from 30 min-1 to 1500 min-1 according to size. Parker?s STK range of permanent magnet brushless motors has been specially designed for direct drive (without a gearbox), particularly in applications needing very low volume and weight in relation to the torque and power requirements. Electromagnetic and thermal optimisation has permitted continuous torque-to-weight ratios up to 14 Nm/Kg to be achieved with natural convection and up to 31 Nm/Kg with fluid cooling. The Parker STK range of frameless motors addresses very demanding industrial applications, not only in terms of performance (dynamic performance, torque capability and precise rotation at low speed) but also in terms of cost. Particular attention has therefore been paid in the design to the combination of technical and economic optimisation. Industrial users can sometimes be dissatisfied with direct drive servo systems because they are frequently based on torque motors with limited power and speed capability. With the STK range, Parker set out to counter this objection by creating motors that could not only satisfy low-speed applications with their associated speed regulation, but could also address direct drive applications up to 30 KW in natural convection at speeds up to 1 500 min-1 . The various speed ratings are achieved by having a range of available windings. Some of these are illustrated in the catalogue, but numerous winding variations are possible to allow the drive system to be optimised.