Product Description:

The MST530R-0011-FH-NNKR-NNNN is a synchronous torque motor produced by Bosch Rexroth Indramat within the MST Synchronous Torque Motors series. Designed for direct-drive rotary stages and high-force positioning axes, this housed unit supplies continuous torque and removes the need for mechanical gear reductions in industrial automation equipment. Liquid circulation channels integrated into the stator accept factory coolant, allowing the motor to sustain rated output without overheating during prolonged duty cycles. Because the load is driven directly, the motor also helps reduce backlash and compliance that can occur in geared transmission stages.

During continuous operation, the motor delivers a rated torque of 3780 Nm while turning at a rated speed of 110 rpm. At that operating point, the drive supplies mechanical output equal to 43.50 kW and draws a phase current of 104.7 A. Torque rises in proportion to the torque constant of 36.10 Nm/A, so closed-loop control can estimate output accurately from stator current. Heat produced at full load is removed through liquid cooling that requires a steady flow of 16.1 l/min, and the housing keeps the coolant passages separated from the windings. Because torque motors often operate for long periods at low shaft speed, this active cooling method helps prevent heat from building up in the stator. Power is connected through a terminal box, which simplifies heavy-gauge cabling inside large machine frames.

Transient demands are supported because the motor can generate a maximum torque of 8460 Nm, and it withstands a standstill duty of 4320 Nm for static positioning tasks. These peak conditions are backed by a permissible line current of 339.0 A, while a winding inductance of 5.5 mH helps limit the rate of current rise during abrupt command changes. Internal losses can reach 11.20 kW under worst-case loading, and the stator resistance of 0.397 Ω is a major source of heat during holding states. Electrical speed is capped at 175 rpm to preserve magnetic stability and to keep vector-controlled drives within acceptable back-EMF limits.