MST530L-0003-FT-N0CN-D303 Bosch Rexroth Indramat
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MPN: R911338259
The Bosch Rexroth Indramat MST530L-0003-FT-N0CN-D303 is part of the MST Synchronous Torque Motors series and delivers a rated power of 19.80 kW at a rated speed of 30 rpm. This motor features 35 pole pairs, a maximum torque of 11000 Nm, and comes with a rated current of 57.8 Amps. It also requires a coolant flow of 21.5 liters per minute and has a standstill torque of 7200 Nm.
Internal Product Review
The MST530L-0003-FT-N0CN-D303 is a Bosch Rexroth Indramat synchronous torque motor that delivers 6300 Nm rated torque at 30 rpm for serious direct-drive performance. With 7200 Nm standstill torque and 11000 Nm maximum torque, the motor stands out as an excellent choice for demanding low-speed applications.
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Product Description:
The MST530L-0003-FT-N0CN-D303 is a low-speed, high-torque synchronous direct-drive motor produced by Bosch Rexroth Indramat as part of the MST Synchronous Torque Motors series. It is intended for rotary tables, extruders, and similar assemblies. In these applications, large amounts of continuous torque must be applied directly at very low speeds, eliminating gearboxes and improving positional accuracy in industrial automation.
The motor reaches a maximum torque of 11000 Nm for brief overload events, while its continuous rated torque is 6300 Nm at a nominal shaft speed of 30 rpm. At that operating point it produces 19.80 kW of mechanical power and draws a rated current of 57.8 A from the drive. Thermal losses under steady load are quantified as 15.00 kW of power dissipation, so a water circuit supplying 21.5 l/min removes the generated heat. During fast indexing or acceleration, the current controller can supply up to 120.0 A, giving enough headroom before magnetic saturation. The stator is wound with 35 pole pairs, and power leads with a 10.0 mm² cross-section handle the observed currents without excess voltage drop.
At standstill the rotor develops 7200 Nm, a figure determined by the electromagnetic torque constant of 109.00 Nm/A. The back-EMF generated at nominal conditions corresponds to 6.700 V/min^-1, giving the drive controller predictable voltage margins during field-oriented operation. Dynamic current transients are moderated by a phase inductance of 25.9 mH, while steady-state copper losses are tied to the winding resistance of 1.9 Ohm at 20 °C. These electrical parameters allow stable torque control without mechanical reduction, enabling the MST530L motor to supply direct, low-speed rotation for high-inertia loads.
