Product Description:

The MDC3.10C/MMA-0 is a permanent-magnet DC motor produced by Bosch Rexroth Indramat as part of the MDC DC Motors series. In industrial automation, it couples directly to gearboxes, ball screws, or belt stages to provide regulated rotary power whenever a controlled direct-current source is preferred over variable-frequency operation. Its design targets indexing tables, conveying equipment, and auxiliary axes that require reliable torque, compact installation, and steady speed control in machine layouts with limited space.

During continuous duty, the motor supplies a nominal torque of 9 Nm while drawing 22 A, and these coordinated ratings describe its sustainable output during steady operation. A torque constant of 0.40 Nm/A links drive current to developed torque, so motion controllers can apply current commands with a predictable torque response. For acceleration bursts, the armature tolerates up to 200 A of peak pulse current, and the commutation system can withstand a maximum of 170 V. The electrical response is rapid because an electrical time constant of 2.6 ms results from 0.45 mH inductance and 0.17 Ω resistance, allowing current to build quickly when voltage is applied. Eight magnet poles and a back-EMF constant of 0.40 V·s/rad set the counter-voltage behavior that the drive must overcome for speed control.

The motor’s thermal behavior is governed by a thermal time constant of 120 min, so winding temperature changes slowly inside the totally enclosed non-ventilated housing. Operation should remain within an ambient temperature not exceeding 45 °C to maintain insulation limits during continuous use. A mechanical time constant of 20.8 ms indicates how quickly speed settles after load disturbances, and the unit’s mass of 35.6 kg gives it inertia suited to medium-duty servo loops. This combination supports stable response to changing loads and predictable thermal behavior during extended operation.