Product Description:

The MST530L-0007-FH-N0KR-NNNN torque motor is produced by Bosch Rexroth Indramat within the MST Synchronous Torque Motors series. Delivered as a liquid-cooled stator and rotor assembly, it mounts around the machine shaft so gearboxes can be eliminated and angular positioning accuracy can be improved in extrusion screws, rotary tables, and winders. An aluminum jacket encapsulates the windings, while the power lead exits on the right, smaller-diameter side to simplify cable routing inside compact housings. No encoder is supplied, so feedback hardware must be selected separately.

Under continuous duty, the motor delivers a rated torque of 6300 Nm at a rated speed of 70 rpm, producing 46.2 kW of mechanical power while drawing 133 A from the inverter. These values describe the steady operating point for applications that demand constant low-speed rotation under high load. A torque constant of 47.40 Nm/A links drive current to output torque, giving predictable control response. Thermal energy is removed by integrated liquid channels, and the phase inductance is 4.9 mH, which helps smooth current ripple so the inverter can regulate without excessive bandwidth. A voltage constant of 3.000 V/rpm sets the back EMF that the power stage must overcome during rotation.

For short bursts, the inverter can deliver a maximum current of 420 A, allowing the motor to reach a peak torque of 13800 Nm for acceleration or disturbance rejection without mechanical oversizing. The rotor’s moment of inertia is 5.76 kg m², which stores kinetic energy and helps reduce speed fluctuation in intermittent processes. When current decays, copper loss is limited by a winding resistance of 0.52 Ω, which also affects I²R heating during duty-cycle planning. The permissible top speed is 100 rpm, and the liquid-cooled assembly supports sustained operation in demanding low-speed applications.