Product Description:

The MST360D-0012-FT-N0CN-NNNN is manufactured by Bosch Rexroth Indramat as part of the MST Synchronous Torque Motors series. This stator module functions as a direct-drive element for rotary positioning axes, eliminating gearboxes and increasing stiffness in automated machinery. It generates high continuous torque at very low speed, making it suitable for indexing tables, printing drums, and other stations where smooth rotation under heavy load is required.

At its nominal operating point, the stator delivers 525 Nm while turning at 115 rpm, which corresponds to a mechanical output of 6.3 kW. Supplying this load requires a phase current of 15.7 A through power leads with a cross-section of 2.5 mm². The magnetic circuit uses 25 pole pairs, so the inverter must generate high-frequency field changes even at low shaft speeds. Electrical parameters measured at 20 °C include a winding resistance of 5.4 Ω, an inductance of 46.2 mH, and a voltage constant of 2.043 V per rpm, values that affect the drive’s voltage window and current ripple. Under continuous duty, copper and iron losses total 3.60 kW, and this heat must be removed by the machine’s cooling circuit.

During intermittent moves, the stator can generate up to 1150 Nm, and reaching this peak level requires a momentary phase current of 39.8 A. With a torque constant of 33.33 Nm/A, the increase in electromagnetic force remains proportional to current, which allows the controller to predict acceleration precisely. The cooling jacket must convey at least 6.0 l/min of conditioned fluid to remove overload losses before they saturate the laminations. Because the active stack weighs 28.8 kg, its thermal mass slows temperature changes, but the heat released at the winding still requires steady circulation. This operating profile suits direct-drive axes that need brief overload torque during intermittent indexing or positioning cycles without a mechanical reduction stage.