Product Description:

The MST290E-0004-FT-N0RN-NNNN synchronous torque motor is produced by Bosch Rexroth Indramat for the MST Synchronous Torque Motors series. As a direct-drive stator designed for low-speed, high-torque tasks in industrial automation, it delivers rotary motion without mechanical gearboxes, providing precise position control and high force density. Its construction supports integration into rotary tables, extruders, and similar equipment that benefit from constant torque at very slow shaft speeds. By eliminating transmission elements, the direct-drive layout helps reduce backlash and supports smooth motion in applications that require accurate indexing.

At its nominal operating point, the motor develops a rated speed of 40 rpm while generating a steady shaft torque of 575 Nm. This output corresponds to 2.40 kW of mechanical power and requires a phase current of 12.5 A supplied by the converter. The electromagnetic design yields a torque constant of 46.00 Nm/A, allowing high torque at modest current and minimizing copper losses. The back-emf constant is 3.620 V per rpm, so drive selection must accommodate low speed with a corresponding voltage rise. This operating profile suits machinery that must hold load smoothly and deliver controlled motion without relying on reduction gearing.

Water cooling is integral to the design, and an open aluminum cooling jacket surrounds the laminated core and accepts supply pressures up to 6.0 bar. Efficient heat extraction permits intermittent overload, allowing the shaft to produce up to 1150 Nm for acceleration or breakout events. Power and feedback conductors exit radially on the larger outside-diameter face, easing installation inside hollow-shaft tooling. The stator weighs 25.1 kg, which helps keep the assembly manageable within compact machine layouts. A phase inductance of 49.5 mH, together with a winding resistance of 8.2 Ohm, smooths current transitions commanded by the drive controller. The open jacket layout also supports stable heat removal when the motor is enclosed within surrounding machine structures.