Product Description:

The MST530G-0007-FT-N0CN-D303 is a low-speed, high-torque synchronous motor produced by Bosch Rexroth Indramat for the MST Synchronous Torque Motors series. The design serves as a direct drive that bolts straight to process equipment such as rotary tables, mixers, or extrusion screws, delivering motion without reducers. Built with a laminated stator and a rotor that carries 35 permanent-magnet pole pairs, the unit supplies high continuous torque while maintaining low mechanical complexity, making it suitable for precision positioning and controlled slow-turning duties within automated production cells.

Under continuous operation, the motor produces 4200.0 Nm at a rated shaft speed of 70 rpm, which corresponds to a mechanical output of 31.00 kW. To reach this point, the windings draw a steady current of 96.0 A, and each ampere contributes torque in proportion to the 43.80 Nm/A torque constant. Thirty-five pole pairs set the electrical fundamental frequency, so the drive inverter must deliver low-frequency, high-current excitation. A back EMF of 3.650 V per revolution per minute aids sensorless control. The copper phase sets present a resistance of 0.9 Ω and an inductance of 10.8 mH, which affect current rise time and filter sizing. Power is fed through two 16.0 mm² conductors per phase to keep voltage drop within acceptable limits.

For overload events, the machine can reach 9200.0 Nm, provided the supply can momentarily furnish 305.0 A. Such transients are thermally limited, and the 8.3 min thermal time constant shows how quickly the stator temperature responds to load changes. During sustained full load, about 9.50 kW of power loss must be removed through the mounting interface and optional liquid cooling rings. The iron laminate and frame weigh 144.0 kg, giving the motor a sizable heat sink that slows temperature rise during intermittent peaks. After short overload periods, heat must be removed through the available cooling path before prolonged rated loading resumes.