Product Description:

The MST530P-0012-FH-N0KR-NNNN is a frameless torque motor produced by Bosch Rexroth Indramat within the MST Synchronous Torque Motors series. This direct-drive unit delivers high continuous torque at low rotational speed, making it suitable for rotary axes that require precise, gearless motion in industrial automation systems such as indexing tables and forming presses. By eliminating mechanical transmissions, the motor supports accurate positioning, reduced maintenance, and high dynamic stiffness, while its hollow stator and rotor set mount directly to the load.

Under nominal conditions, the motor delivers a rated torque of 2940 Nm at a rated speed of 120 rpm, yielding a mechanical output of 36.9 kW. That operating point is reached with 83.8 A of rated current. For acceleration events, the electromagnetic system provides a maximum torque of 6580 Nm while the inverter may supply up to 284 A, and during locked-rotor tests it sustains 3300 Nm of standstill torque with 93.9 A of standstill current. The torque constant of 35.10 Nm/A lets the controller map phase current directly to shaft torque, and the electrical speed ceiling sets the upper velocity limit at 180 rpm. A winding inductance of 5.76 mH and a resistance of 0.485 Ω help determine current ripple, losses, and drive sizing.

Thermal stability relies on a required coolant flow of 12.5 L/min through passages holding 1.65 L of liquid. The motor generates back EMF at a voltage constant of 3.128 V/rpm, which allows the drive to predict induced voltage as speed rises. Power leads with a cross-section of 25.0 mm² carry the rated and peak currents safely. Adequate liquid cooling helps keep copper temperature within acceptable limits so continuous torque can be maintained during operation.