Product Description:

The MST450E-0012-FT-N0SN-NNNN is a direct-drive synchronous torque motor produced by Bosch Rexroth Indramat in the MST Synchronous Torque Motors series. Designed as a frameless stator-rotor assembly, it delivers high continuous torque at low rotational speed, allowing machine builders to mount the motor directly on large indexing tables, extruders, or rotary axes without intermediate gear stages. Integrating the drive element at the load reduces mechanical play and supports precise positioning tasks in industrial automation processes.

Thermal regulation is handled by liquid cooling, with an aluminum jacket circulating coolant around the windings to keep temperature rise within limits during continuous duty. At the rated operating point, the shaft turns at 120 rpm, where the electromagnetic system supplies 1400.0 Nm while drawing 46.0 A from the drive. This operating point corresponds to a mechanical output of 17.60 kW, which suits heavy rotary duties such as forming, winding, and mixing. Power reaches the stator through a small-diameter cable with 10.0 mm² conductors, and the motor is supplied without an encoder, so an external feedback device is needed when closed-loop position control is required. The aluminum cooling jacket also acts as structural encapsulation, helping protect the windings from vibration and fluid ingress.

The motor tolerates brief overloads, and torque can rise to 3250.0 Nm during rapid acceleration when the inverter can provide the necessary peak current. Maximum shaft speed is limited to 220 rpm to protect magnetic and mechanical stability at the upper end of the speed range. Commanded current is converted to torque by a constant of 30.40 Nm/A, giving the drive a predictable relationship between current demand and rotary force. The back EMF constant is 1.930 V per min⁻¹, so the required voltage increases with speed. Electrical behavior also depends on a phase inductance of 10 mH and a winding resistance of 1.1 Ω at 20 °C, which affect current ripple, heat generation, and drive tuning behavior.