Product Description:

The MST530P-0012-FT-N0CN-D303 is a synchronous torque motor produced by Bosch Rexroth Indramat within the MST Synchronous Torque Motors series. It is intended for direct-drive rotary tables, extruders, and similar equipment. The unit supplies very high continuous torque at low shaft speed so machine builders can eliminate gearboxes and raise positioning accuracy in industrial automation.

Its electrical maximum speed is 180 rpm, so motion remains slow enough for direct coupling while retaining dynamic response. During short-term peaks, the windings can accept up to 284 A, enabling a maximum output torque of 6580 Nm before thermal limits are reached. Under continuous duty, the motor delivers 36.90 kW of shaft power with a rated current of 83.8 A, corresponding to a nominal torque of 2940 Nm. Power conductors must use a cross-section of 25.0 mm², minimizing voltage drop at the drive terminals. Because the stator is liquid-cooled, the circuit requires 12.5 l/min of coolant to evacuate the 8.70 kW of internal losses generated at full load. An inverter paired with this motor must support these thermal and electrical operating values in a closed-loop axis.

The electromagnetic behavior is further characterized by a winding inductance of 5.76 mH, a winding resistance of 0.485 Ohm, and a leakage capacitance of 32.2 nF. These parameters influence current rise time, steady-state heating, and the common-mode currents seen by the drive. A torque constant of 35.10 Nm/A lets the converter predict torque from measured phase current, while the standstill current of 93.9 A must be considered when sizing protective devices. The control electronics must be matched to these base values to maintain stable motion across the speed range without excessive overshoot or thermal stress.