MDD025A-N-100-N2K-040MR0

MDD Synchronous Motors

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The MDD025A-N-100-N2K-040MR0 is a size 025 synchronous motor with a nominal speed of 10000 min-1. Bosch Rexroth Indramat part of the MDD Synchronous Motors series features an integrated absolute encoder and resolver feedback. It delivers 0.33 Nm continuous torque, has a keyway shaft and a right-side connector.

Technical Specifications

Balancing
Standard

Holding Brake
Without blocking brake

Centering Diameter
40 mm

Housing
Standard

Encoder
Integrated absolute encoder

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
Right

Connection Type
Connector

Product Type
Motor for digital drive controllers

Shaft End
Standard (without side B shaft end)

Frequently Asked Questions

How does the connector-based design on the right side influence installation and maintenance?

It standardizes cable routing and simplifies swapping cables or replacing motors without disturbing wiring layout too much. But connectors must be rated for the environmental conditions (temperature, dust, moisture), and connector orientation restricts how the motor can be mounted or how cables are run.

In what ways does “size 025” constrain torque, inertia, and application suitability?

Size 025 implies a relatively small rotor/stator diameter, meaning lower inertia—good for fast acceleration/deceleration—but also limits maximum torque and thermal mass. It works well in lighter, high-speed, high-precision tasks rather than heavy load or long continuous torque at high speeds.

What happens to cooling and thermal performance at high speeds with this motor?

Without an external blower or special surface cooling, thermal limits may be reached due to losses (iron, copper, friction). For continuous duty near nominal specs (10,000 rpm with load), adequate airflow, heat sinking via the housing, and ensuring ambient temperature are within spec are critical.

How do feedback resolution and accuracy impact closed-loop control when using this motor?

High resolution from the encoder and resolver allows tight control over speed and position, reducing error, overshoot, and oscillations, especially at high ramps or in positional tasks. Lower resolution could lead to quantization effects, lag in detecting rotor position, and worse control stability.

What specific installation or controller requirements does the “Bosch Rexroth manufacturer model MDD025A-N-100-N2K-040MR0” impose?

You need a compatible digital drive (e.g. Bosch Rexroth MDD or DDS series) that supports the resolver + absolute encoder feedback combo, has connector interfaces properly rated, and can manage the thermal load at high rpm. Also the mechanical mounting (for centering diameter, keyway, shaft loads) must match Indramat’s guidelines to avoid premature bearing failure.

Common Misspellings

Internal Product Review

The MDD025A-N-100-N2K-040MR0 motor from Bosch Rexroth offers a 40 mm centering diameter, 0.33 Nm continuous torque at standstill, and 10,000 min⁻¹ nominal speed. It comes with resolver feedback, an integrated absolute encoder, and connector-based design for digital drive controllers. This motor is suitable for robotics, automated packaging systems, and precision industrial machinery.