Product Description:

The MST290E-0004-FT-N0CN-NNNN is a stator section from the MST Synchronous Torque Motors series produced by Bosch Rexroth Indramat. As a torque motor, it delivers high mechanical moment at very low rotational speed, allowing direct-drive indexing tables, printing cylinders, or extruder screws to move without intermediate gearboxes. This design minimizes backlash and improves position repeatability in closed-loop automation.

Under continuous duty the motor outputs 575 Nm while turning at a rated speed of 40 min-1; together these values translate to a mechanical output of 2.40 kW. Achieving this point requires a phase current of 12.5 A, and each ampere contributes torque according to a constant of 46.00 Nm/A. To keep the copper temperature stable, the cooling jacket must receive 9.0 l/min of liquid at the specified pressure drop. Electrical connection is made with 1.0 mm² power leads, whose length and routing must respect the stator’s winding resistance of 8.2 Ω and inductance of 49.5 mH for correct current regulation. The voltage constant of 3.620 V per min-1 defines the back-EMF the drive will see at any given speed, and normal operation dissipates 5.50 kW as heat that the coolant must remove. A drive rated for 50.0 A peak current is required so dynamic events remain within the motor’s electrical limits.

For acceleration or brief overloads the stator can exert up to 1150 Nm, with mechanical velocity capped at 145 min-1; these figures set the envelope for motion-profile planning and inertia matching. The stator body weighs 25.1 kg, an important parameter when integrating the part into rotary indexing assemblies or when calculating bearing loads. Because the motor converts electrical power directly into torque at the workpiece, designers can eliminate gear stages, reduce maintenance, and achieve smoother low-speed motion while still staying within the thermal and electrical boundaries defined above.