Product Description:

The MST450E-0006-FT-N0CN-D303 torque motor is produced by Bosch Rexroth Indramat within the MST Synchronous Torque Motors series. It is a low-speed, high-torque direct-drive unit intended for rotary positioning tables, winders, and other automation axes that benefit from gearless operation. By mounting the stator to the machine frame and coupling the rotor directly to the load, the motor supplies continuous rotational force without the backlash associated with mechanical transmissions.

At its nominal operating point, the motor delivers 1400 Nm while turning at 60 rpm; this combination corresponds to a mechanical output of 8.80 kW. A rated current of 32.0 A is required to reach that point, and the magnetic design yields a torque constant of 43.80 Nm/A, so the drive controller can relate output torque to phase current with straightforward scaling. Heat generated in the stator windings is removed through liquid cooling; the cooling jacket surrounds the encapsulated copper to maintain stable insulation temperatures during continuous duty. Power conductors are routed through stator-side cables with large outside diameters, and each conductor uses a 6.0 mm² cross-section that matches the connection wire gauge of AWG 10.

For intermittent demands, the motor can generate up to 3250 Nm and accelerate the load to 120 rpm, drawing a peak phase current of 88.0 A. The winding resistance measured at 20 °C is 3.2 Ω, and the voltage constant is 3.860 V/rpm, so the inverter must accommodate the resulting back EMF during dynamic braking. A stator mass of 54.2 kg gives the assembly significant thermal inertia, allowing brief overloads without excessive temperature rise. Thermal encapsulation fills voids around the coils to enhance heat conduction and protect against vibration-induced insulation damage.