Product Description:

The MST530L-0006-FT-N0CN-D303 is a direct-drive synchronous torque motor manufactured by Bosch Rexroth Indramat and supplied within the MST Synchronous Torque Motors series. Designed for industrial automation, it provides high continuous torque at very low shaft speeds, allowing machine builders to mount the load directly on the motor flange. Typical uses include extrusion screws, rotary positioning tables, and printing cylinders where precise speed regulation and elimination of mechanical backlash are required. The direct-drive layout also removes the need for intermediate gearboxes, belts, or couplings in many installations, which helps reduce wear points and improve positioning response.

During continuous operation, the motor delivers a rated shaft torque of 6300 Nm while turning at a rated speed of 60 rpm; together these figures correspond to a rated mechanical output of 39.6 kW. To reach that operating point, the stator windings draw a rated current of 120 A. This current level is the principal sizing basis for the matching inverter and for the selected conductor cross-section. The drive must regulate current smoothly across the low-speed range so the motor can maintain stable torque during heavy process loads. When the application demands faster index moves, the rotor can accelerate up to a maximum speed of 110 rpm. At this limit, the electromagnetic design supports a peak torque of 13800 Nm, giving short-term overload capacity for process upsets or rapid acceleration profiles.

For static holding or very slow creep motions, the machine may rely on the motor’s standstill torque of 7200 Nm, which is available without exceeding a standstill winding current of 137.1 A. This operating behavior is useful on axes that must hold a process position for long periods without mechanical transmission components. Protective drive algorithms must, however, observe the absolute current ceiling of 279 A to avoid thermal overstress during transient events. By matching these current values to the inverter’s capabilities, the system can use the motor’s low-speed torque plateau while keeping copper losses and insulation temperature within allowable limits.