Product Description:

The MST450D-0006-FT-N2CN-NNNN torque motor is produced by Bosch Rexroth Indramat within the MST Synchronous Torque Motors series. This stator module is intended for direct-drive applications in industrial automation, where high continuous torque at very low shaft speed allows gearless rotation of large tables, extruders, or rolling drums. Integrated into a machine frame, it converts drive current supplied by an external inverter into precise rotary motion, while feedback devices in the matching rotor support position control in process-oriented duties.

Thermal management is provided by liquid cooling that circulates through an aluminum cooling jacket around the laminated core, helping keep copper temperature stable under continuous load. Power conductors enter through the stator end by way of a shielded cable, which helps reduce loop area and electrical noise. At the nominal operating point, the motor delivers 810 Nm of torque while turning at 60 rpm, producing 5.10 kW of mechanical power. Maintaining this output requires a phase current of 18.8 A. The stator’s copper coils present 3.95 ohms of phase resistance and an inductance of 31 mH, which influence current rise time and the voltage required from the external drive during dynamic torque commands.

Beyond the continuous rating, the winding can accept up to 50.0 A for short intervals, enabling a peak torque capability of 1800 Nm for rapid acceleration or disturbance rejection. The electromagnetic conversion factor is 43.08 Nm/A, so control systems can estimate output torque directly from measured current. To support peak operation, the cooling circuit must deliver 6.0 L/min of coolant, and the power leads should use a 2.5 mm² cross-section to limit resistive losses. The stator has a mass of 38.7 kg, so the machine frame and support structure must account for that load during integration.