Product Description:

The MST290B-0018-FT-N2CN-NNNN synchronous torque motor is manufactured by Bosch Rexroth Indramat within the MST Synchronous Torque Motors series. It is a frameless, direct-drive component used to supply continuous rotary force without gear reduction in indexing tables, extruders, or print rollers. The rotor couples directly to the load, allowing servo electronics to control position and speed without mechanical backlash.

Under nominal operating conditions, the motor delivers a rated torque of 220 Nm at a rated speed of 180 rpm, which corresponds to a continuous shaft output of 4.10 kW. To reach this output, the windings draw a rated phase current of 14.8 A from the inverter. Each ampere contributes predictable mechanical force because the torque constant is 14.90 Nm/A. The stator copper is distributed across three conductors whose combined resistance is 6.6 ohms at 20 °C, and this value affects I²R losses and thermal rise. Power wiring should be sized to 2.5 mm², while a 1.0 mm² sensor pair carries encoder or temperature signals. Thirty pole pairs in the rotor create a dense magnetic field that sustains torque even at the low base speed.

For short duty cycles, the drive can supply a peak phase current of 60.0 A, letting the motor reach a maximum torque of 460 Nm and a top speed of 340 rpm before back EMF limits the inverter. Dynamic events are brief because the thermal time constant is 3.3 minutes, and the stator mass of 13.5 kg absorbs heat for that interval before temperature sensors react. Inductance of 34.8 mH moderates current ripple, enhancing servo smoothness when the inverter applies vector control. A minimum 1.5 mm² power cable must be maintained on long runs to keep conductor temperature within rating.