MDD090C-N-030-N2M-110GR1

MDD Synchronous Motors

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The MDD090C-N-030-N2M-110GR1 motor features a centering diameter of 110 mm and an integrated multiturn absolute encoder. Manufactured by Bosch Rexroth Indramat in the MDD Synchronous Motors series, it offers a holding brake torque of 6.5 Nm and a nominal speed of 3000 min⁻¹. It supports horizontal or vertical installation and operates at thermal class 155.

Technical Specifications

Balancing
Standard

Holding Brake
With blocking brake

Holding Brake Torque
6.5 Nm

Centering Diameter
110 mm

Housing
Standard

Encoder
Integrated multiturn absolute encoder

Motor Length Code
C

Motor Size
090

Nominal Speed
3000 min⁻¹

Shaft Type
Plain shaft

Connection Direction
Right

Product Type
Motor for digital drive controllers

Shaft End
Standard (without side B shaft end)

Installation Position
Horizontal, Vertical

Surface Temperature During Operation
More Than 60 degrees C

Thermal Class
155

Voltage Rating of Holding Brake
24 VDC +/-10%

Frequently Asked Questions

Given the thermal class 155 insulation, how does that limit ambient temperature or duty cycle?

Class 155 (class F) allows winding temperatures up to ~155 °C, so your insulation margin supports moderate overloads or elevated ambient conditions. Still, continuous operation in extremely high ambient (> 45–55 °C) may require derating or better cooling.

How does having an integrated multiturn absolute encoder improve motion reliability?

The absolute encoder ensures position feedback is retained across power cycles, so you don’t need homing routines after every reboot. It also allows faster start-up and better recovery in case of power interruptions.

What are the trade-offs when using a plain shaft (vs. keyed or shrink-disc)?

A plain shaft limits how you connect couplings or pulleys (you may need clamp couplings or pressed fit), but you avoid stress concentrations that can come with keyways. For high torque or shock loads, you might prefer a keyed or shrunk connection to avoid slippage.

In a high-speed application reaching 3000 min⁻¹, what factors limit performance?

Rotor dynamics (inertia), bearing life, and heating are limiting factors: high speed increases centrifugal stresses and bearing wear, so cooling and balancing become critical. Also, torque falls off due to voltage and back-EMF constraints at high RPM.

How should one size the drive amplifier when driving this motor?

Select a drive capable of supplying peak currents above the motor’s demanded transient current and matching the voltage rating, ensuring that the drive’s voltage headroom covers back-EMF at full speed. The drive should also support absolute encoder interfaces and braking current paths.

Common Misspellings

Internal Product Review

The MDD090C-N-030-N2M-110GR1 motor by Bosch Rexroth features a 3000 min⁻¹ nominal speed, plain shaft, and 6.5 Nm holding brake torque. It includes an integrated multiturn absolute encoder and supports horizontal or vertical installation. This motor is ideal for use in packaging machines, robotics, and CNC automation systems.