Product Description:

The MDC10.20F/MM-0/S06 is a permanent-magnet DC motor built by Bosch Rexroth Indramat for the MDC DC Motors series. Designed for closed-loop drive systems, the machine converts direct current from a matched power module into tightly regulated shaft rotation. Its role in industrial automation is to supply controllable torque to conveyors, winders, and positioning mechanisms where precise speed tracking and rapid reversals are required.

During continuous duty, the motor generates 6.1 Nm of shaft torque while drawing a nominal current of 13 A. The generated voltage rises with speed at 49 V/1000 rpm, and the electromagnetic torque increases in proportion to current at 0.47 Nm/A. An armature resistance of 0.40 ohm limits inrush current, while an inductance of 2.4 mH shapes the current ripple imposed by the chopper stage. Together, these electrical properties produce a time constant of 6.0 ms, permitting fast current regulation without instability. The mechanical time constant is 9.0 ms, indicating how quickly the rotor accelerates when a step command is issued; this rapid response is aided by a low rotor inertia of 0.005 kg·m². Under no-load conditions, the shaft can reach 2000 rpm without exceeding the rated brush commutation limits.

For transient moves such as web tension correction, the winding can accept up to 100 A of pulse current, provided the commutator voltage does not exceed 170 V. Heat generated by these surges is absorbed by the steel housing and dissipated through totally enclosed, nonventilated cooling, so no external fan is required. The large thermal mass provides a thermal time constant of 70 min, allowing intermittent overloads without an immediate temperature rise. This cooling arrangement supports long production cycles while helping keep the winding insulation within safe temperature limits.