Product Description:

The MST530F-0012-FH-N0KR-NNNN is a low-speed, high-torque synchronous motor produced by Bosch Rexroth Indramat within the MST Synchronous Torque Motors series. In automation cells, it serves as a direct-drive rotary axis that delivers controlled angular motion without mechanical gear reduction. By coupling the rotor directly to the load, this motor eliminates backlash and allows precise positioning for indexing tables, extruders, and large printing cylinders while maintaining constant torque at very low rotational speeds.

During continuous operation, the motor reaches a rated speed of 120 rpm, where it produces a rated torque of 2520 Nm and a mechanical output of 31.70 kW. To supply this operating point, the inverter must deliver a rated current of 71.3 A. At standstill, the electromagnetic system can hold loads with 2880 Nm while drawing up to 82.0 A, which is relevant for indexing cycles that pause under full load. The current-to-torque relationship uses a torque constant of 35.30 Nm/A, and the generated back EMF follows a voltage constant of 2.430 V per min⁻¹. These values allow the drive controller to calculate current commands accurately and limit acceleration to avoid magnetic saturation.

Dynamic peaks are higher than the continuous figures, and the winding can momentarily supply a maximum torque of 5640 Nm when the drive releases current transients up to 253.0 A. Heat generated under these peaks, along with the continuous electrical power dissipation of 8.10 kW, is removed by an internal water jacket that requires a flow of 11.5 l/min. The magnetic circuit uses a winding inductance of 6.45 mH and a resistance of 0.546 ohm, which affect current rise time and copper losses. Insulation design limits common-mode leakage capacitance to 27.6 nF, supporting reliable operation with high-frequency pulse-width-modulated voltages.