Product Description:

The MST450E-0012-FT-N0RN-NNNN torque motor is produced by Bosch Rexroth Indramat as part of the MST Synchronous Torque Motors series. This frameless, liquid-cooled synchronous unit mounts directly inside a machine frame, removing the need for external gearboxes while providing accurate, low-speed rotary motion. Such integration is valuable for rotary tables, printing cylinders, and forming presses that demand steady torque at slow speeds. Its high pole count and compact stator design maintain constant electromagnetic force during continuous and intermittent duty cycles, supporting precise positioning and direct-drive efficiency.

At the nominal operating point, the motor supplies a rated torque of 1400 Nm while turning at a rated speed of 150 rpm. That combination yields an output power of 21.2 kW and is reached with a rated phase current of 40.7 A. When the shaft is locked, the electromagnetic system develops a standstill torque of 1600 Nm, and the related standstill current is 48.6 A. These values indicate the unit’s capacity to start, stop, or hold heavy inertial loads without mechanical reduction, allowing simplified drivetrain layouts and minimized backlash in precision automation equipment.

For short-term demands, the windings tolerate a maximum current of 125 A, and the rotor can accelerate to an electrical speed of 350 rpm before field-weakening control is required. Up to 6.20 kW of heat must be removed, so 8.9 l/min of coolant is circulated through the jacket at an inlet pressure not exceeding 6.0 bar, and power connections call for 10.0 mm² conductors. Electromagnetic conversion efficiency is described by a torque constant of 35.92 Nm/A and a back-EMF constant of 1.818 V/rpm. Dynamic current regulation is affected by a winding inductance of 10.0 mH together with a resistance of 1.16 Ω at 20 °C, and these values influence the servo drive’s response time and stability.