Product Description:

The MST450E-0011-NS-N0CN-NNNN torque motor is built by Bosch Rexroth Indramat within the MST Synchronous Torque Motors series. This permanent-magnet synchronous unit is intended for direct-drive installations, so it mounts inside machine frames without belts or gearboxes and applies torque directly to the driven axis. In automated production lines, it turns indexing tables, extruder screws, and printing cylinders that need steady low-speed motion and accurate angular positioning, while its surface-acting stator design lowers backlash and reduces routine maintenance.

At its rated operating point, the motor delivers 560 Nm at 110 rpm, corresponding to 6.50 kW of mechanical output. Phase current under these conditions is 12.8 A, and locked-rotor testing records 14.3 A of standstill current. With a torque constant of 43.80 Nm/A, the drive can estimate load torque directly from measured current. Short overloads are possible because the windings can accept up to 88.0 A momentarily. A voltage constant of 3.860 V/rpm sets the back-EMF level the controller must overcome, while a winding resistance of 2.6 Ω contributes to copper losses. The 22.1 mH inductance smooths current transitions, and phase conductors use 2.5 mm² power cable while auxiliary sensors are routed through 1.0 mm² leads to maintain signal integrity.

During zero-speed holding, the rotor can sustain 625 Nm of static torque, supporting heavy tables without external brakes. Heat builds slowly, evidenced by a thermal time constant of 170.0 min, so intermittent peaks seldom trigger a rapid temperature rise. Stray paths sum to a leakage capacitance of 24.1 nF, which should be considered in EMI filtering. Maximum mechanical speed is limited to 135 rpm, which suits applications that prioritize high torque and stable low-speed operation.