Product Description:

The MST530B-0010-FT-N0CN-NNNN is a low-speed, high-torque motor produced by Bosch Rexroth Indramat within the MST Synchronous Torque Motors series. By combining a permanent-magnet rotor and a stator equipped with an open cooling jacket, the unit delivers direct rotary force to indexing tables, extruders, or gearless drives that favor precise motion at very low rotational rates. An axial electrical connection on the larger diameter side simplifies wiring when the motor is integrated into compact machine frames.

Under continuous duty, the motor provides a rated torque of 800 Nm at a rated speed of 100 rpm, providing constant mechanical output without intermediate gearing. The corresponding rated current is 28.6 A, and the control hardware must supply this steady RMS value while maintaining phase symmetry. For dynamic load steps, the winding can accept up to 71 A, allowing brief accelerations beyond the steady-state envelope. Electrical power drawn at rated conditions reaches 8.4 kW, reflecting torque, speed, and losses associated with the 1.39 Ω winding resistance. Thirty-five pole pairs create dense magnetic flux so even small frequency changes translate into accurate shaft positioning. The stator mass of 36 kg contributes thermal inertia, and the open cooling jacket channels fluid around the frame to remove heat from the motor housing.

Peak process demands can be met because stall torque capability extends to 1800 Nm for short intervals governed by the 8.3-minute thermal time constant. The magnetic circuit produces a torque constant of 28 Nm/A, providing predictable linear gain for current controllers. Back EMF rises linearly with speed at 1.89 V/rpm, which helps the drive set voltage limits during field weakening. Combined stator and mounted rotor inductance of 16.2 mH filters current ripple, permitting smoother torque even when the inverter switches at modest carrier frequencies.