Product Description:

The MDC3.30B/MM-0 is a permanent-magnet DC motor produced by Bosch Rexroth Indramat within the MDC DC Motors series. This unit is designed to supply controlled rotary power for industrial automation axes, presses, and material-handling modules where variable-speed torque is commanded by a matched drive. By converting direct current from the drive into mechanical rotation through its commutated armature, the motor forms the electromechanical interface between the power electronics and the machine load, allowing precise speed and torque regulation in closed-loop systems.

The armature’s inductance is 0.5 mH, so current changes quickly and reduces delay in torque buildup during dynamic commands. Copper losses are governed by an armature resistance of 0.151 Ω at 20 °C, a value chosen to balance efficiency and manageable heat rise. A continuous current rating of 33 A sets the thermal limit for uninterrupted duty, while the voltage constant of 0.8 Vs/rad links rotational speed to generated back EMF and assists the drive in speed estimation. With a torque constant of 0.8 Nm/A, commanded armature current translates linearly into shaft torque, supporting predictable force production. The mechanical time constant is 13.9 ms, indicating how rapidly the speed settles after a step change, and current ripple is limited to 0.5%, which helps support smooth motion.

For short bursts, the drive may supply a peak pulse current of 300 A, enabling rapid acceleration without thermal overload, provided the ambient temperature does not exceed 45 °C. Commutation insulation withstands a peak terminal voltage of 170 V, matching typical DC bus levels in the associated drive platform. Acceleration behavior is also influenced by a rotor inertia of 0.059 kg·m², which offers a balance between responsiveness and load matching. Installation weight is 58.4 kg, so the mounting structure must support that mass and help limit transmitted vibration.