MDD025A-N-100-N2G-040MA1

MDD Synchronous Motors

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The MDD025A-N-100-N2G-040MA1 motor from Bosch Rexroth Indramat is part of the MDD Synchronous Motors series. It features a blocking brake with 1.0 Nm holding torque and standard balancing, and offers a centering diameter of 40 mm along with a continuous standstill torque of 0.33 Nm. The motor includes resolver feedback and runs at a nominal speed of 10000 min⁻¹ with a keyway shaft. It connects via a side A connector for digital drive controllers.

Technical Specifications

Balancing
Standard

Holding Brake
With blocking brake

Holding Brake Torque
1.0 Nm

Centering Diameter
40 mm

Housing
Standard

Motor Feedback
Resolver feedback

Continuous Torque at Standstill
0.33 Nm

Motor Length Code
A

Motor Size
025

Nominal Speed
10000 min⁻¹

Shaft Seal
Without shaft seal

Shaft Type
keyway

Connection Direction
Side A

Connection Type
Connector

Product Type
Motor for digital drive controllers

Shaft End
Standard (without side B shaft end)

Frequently Asked Questions

How does the blocking brake performance (1.0 Nm holding torque) affect application safety and positioning when power is lost?

A 1.0 Nm brake holding torque allows the axis to remain in place under modest external loads during power interruptions, reducing drift; however, for heavier loads or high inertia, external mechanical support or higher torque brakes may still be needed.

Why is standard balancing relevant for running the motor at its nominal speed of 10,000 min⁻¹?

Standard balancing ensures that rotor imbalance (vibration) is kept within tolerances so that at high RPM the motor runs smoothly, avoiding excess bearing wear and noise; without good balance, resonance and mechanical stress increase significantly with speed.

What are the implications of choosing resolver feedback with respect to control accuracy and maintenance?

Resolver feedback offers robust operation in harsh environments (temperature, EMI) and good relative precision (≈ ±7 angular minutes), but absolute position is lost when power cycles unless an absolute encoder or homing scheme is used.

What are the thermal and environmental limits of operation for MDD series motors of this size?

Typical ambient temperature rating is 0 to +45 °C, installation elevation up to ~1000 m; exceeding these causes derating of continuous torque and possibly reduced permissible overload periods

What electrical and drive controller requirements does the motor set (side-A connector, resolver, keyway shaft) impose?

The drive must support a resolver feedback interface, have matching connector on Side A (direction of connection), and tolerate cable lengths / routing to avoid signal noise; the power electronics must handle peak currents & torque demands around the curves for this motor size.

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Internal Product Review

The MDD025A-N-100-N2G-040MA1 motor by Bosch Rexroth delivers 0.33 Nm continuous torque and 10,000 min⁻¹ nominal speed with resolver feedback and keyway shaft. It includes a 1.0 Nm blocking brake and standard housing. This motor is well-suited for applications in robotics, electronics manufacturing, and packaging automation.