Product Description:

The MST530F-0012-FT-N0CN-NNNN torque motor is produced by Bosch Rexroth Indramat within the MST Synchronous Torque Motors series. As a frameless, low-speed permanent-magnet machine, it is intended for direct-drive tables, extruders, and indexing axes where gearboxes can be eliminated. Its electromagnetic design allows high continuous torque at modest rotational speed, which supports precise positioning and smooth force delivery in industrial automation. Because the motor is frameless, the active components can be integrated directly into the machine structure, which helps reduce drivetrain compliance and backlash.

Under rated operating conditions, the motor delivers 2520 Nm of torque at a shaft speed of 120 rpm. This working point corresponds to a mechanical output of 31.7 kW while drawing a phase current of 71.3 A. The torque-producing capability is linked to a proportionality factor of 35.30 Nm/A, and the generated back-EMF is characterized by a 2.430 V/rpm voltage constant. Copper and iron losses amount to 8.10 kW of power dissipation, so liquid cooling is required; a 1.80 L internal channel must be supplied with 11.5 L/min of coolant to keep stator temperature within limits. The three-phase winding presents 6.45 mH of inductance and 0.546 Ω of resistance, values that influence current ripple and inverter sizing.

At zero speed, the electromagnetic system can hold 2880 Nm, allowing static clamping without external brakes. For intermittent peaks, the drive may reach 5640 Nm if the controller can supply up to 253 A. The rotor mass distribution results in a 2.3 kg·m² moment of inertia, which damps speed fluctuations but slows acceleration. This balance is useful for large rotary tables and other heavy loads that require steady low-speed motion and direct coupling without intermediate gearing. It can also help promote smoother rotation when the application is subject to changing process forces during operation.