MDD090C-N-030-N2L-130GL2

MDD Synchronous Motors

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The MDD090C-N-030-N2L-130GL2 synchronous motor from Bosch Rexroth Indramat is part of the MDD Synchronous Motors series. It features a holding brake with 11.0 Nm torque, provides 10.4 Nm continuous standstill torque, and runs at 3000 min⁻¹ nominal speed. It uses digital servo feedback (DSF) and has a 130 mm centering diameter plus a shaft seal. It connects via a left-side connector and features a plain shaft end.

Technical Specifications

Balancing
Standard

Holding Brake
With blocking brake

Holding Brake Torque
11.0 Nm

Centering Diameter
130 mm

Housing
Standard

Motor Feedback
Digital servo feedback (DSF)

Continuous Torque at Standstill
10.4 Nm

Motor Length Code
C

Motor Size
090

Nominal Speed
3000 min⁻¹

Shaft Seal
With shaft seal

Shaft Type
Plain shaft

Connection Direction
Left

Connection Type
Connector

Product Type
Motor for digital drive controllers

Shaft End
Standard (without side B shaft end)

Frequently Asked Questions

What does the holding‐brake torque of 11.0 Nm imply for system design?

It defines the maximum static torque the brake can resist when power is off, so your mechanical load should not exceed this if you rely on the brake alone for holding. In practice, leave a safety margin (e.g. 20–30 %) to avoid slippage or creep under thermal expansion.

How does a continuous standstill torque of 10.4 Nm affect startup behavior?

It means the motor can hold or overcome up to 10.4 Nm from rest without movement, which determines how much static load or preload the system can handle. If your required static torque exceeds this, you’ll need gearing or external locking.

At 3000 min⁻¹ nominal speed, what is the trade-off between torque and speed margin?

The motor’s torque typically falls off at higher speeds due to back-EMF and current limits, so running close to nominal reduces torque headroom. To avoid saturation or overheating, you’ll want operational speed limits significantly below maximum under load.

What kind of feedback performance can be expected from the DSF (digital servo feedback)?

DSF gives high-resolution position and velocity feedback suitable for tight servo loops with low latency, improving dynamic response. It also often enables diagnostic communication (e.g. error flags or status data) embedded in the feedback channel.

How does inclusion of a shaft seal influence maintenance and lifetime?

The shaft seal helps prevent ingress of dust, coolant, or lubricants, thereby protecting internal bearings and windings and reducing maintenance frequency. However, the seal also introduces friction and wear, so proper lubrication and seal material choice are critical.

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Internal Product Review

The MDD090C-N-030-N2L-130GL2 motor by Bosch Rexroth offers digital servo feedback, a plain shaft, and a shaft seal for reliable operation. It delivers 10.4 Nm continuous torque and 11 Nm holding brake torque at 3000 min⁻¹ speed. This motor is widely used in CNC systems, robotic arms, and automated assembly lines.