MDD025A-N-100-N2G-040GD0
MDD Synchronous Motors
The MDD025A-N-100-N2G-040GD0 is a motor for digital drive controllers manufactured by Bosch Rexroth Indramat in the MDD Synchronous Motors series. It features resolver feedback and delivers a continuous torque at standstill of 0.33 Nm. Designed with a 40 mm centering diameter, plain shaft, shaft seal, and standard housing, it omits a blocking brake. Side B connection via connecting cable with coupling unit.
Technical Specifications
Balancing
Standard
Holding Brake
Without blocking brake
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
With shaft seal
Shaft Type
Plain shaft
Connection Direction
Side B
Connection Type
Connecting cable with coupling unit
Product Type
Motor for digital drive controllers
Shaft End
Standard (without side B shaft end)
Frequently Asked Questions
What are the implications of the resolver feedback in the MDD025A-N-100-N2G-040GD0 for control loop stability?
Resolver feedback offers robust analog position signals and high resistance to electromagnetic interference, but introduces phase lag and requires proper filtering in the drive to avoid overshoot. For high-speed operation (10,000 min⁻¹), the control system must ensure low latency and accurate calibration of resolver offset to maintain precise torque and position control.
How does the continuous torque at standstill (0.33 Nm) impact application choice in robotics or automation?
This moderate torque at zero speed means the motor can hold a load without motion—but only for light loads or with gearing—making it suitable for small actuators or precision positioning, not heavy static loads. For robotics arms or end effector uses, you’d need to size for both torque at speed and torque at standstill including mechanical leverage or gearbox ratios.
Does the absence of a blocking or holding brake limit its use in safety or vertical load applications?
Yes—without a blocking brake, the motor cannot mechanically prevent motion under power loss or gravity, so vertical or over-hung loads risk drift or backdrive unless external brakes or mechanical locks are used. Safety systems or failsafe mechanisms must be integrated if used in lifting, clamping, or vertical positioning.
What are the trade-offs of having side B connection via a cable with coupling unit?
Side B connection (on the shaft end opposite to output) keeps power/feedback cabling away from the mechanical load side, reducing interference and facilitating wiring. However, the coupling unit adds connection length and may introduce additional resistance or signal loss; cable routing must also avoid tight bends or torsion that can degrade performance or damage the cable.
How would the motor behave in peak torque vs continuous torque demands over its speed range?
While standstill torque is 0.33 Nm, as speed increases, available torque will drop due to back-EMF and losses; peak torque is usually several times the continuous value for short durations but constrained by heating. In high dynamic motions, the drive must account for torque speed curves so that acceleration and deceleration do not cause overheating or overshoot.
Common Misspellings
MDD-025A-N-100-N2G-040GD0
MDD025A N 100 N2G 040GD0
MDD025A-N-100-N2G-040-GD0
MDD025A-N-100-N2G-040-GDO
MDD025A-N-100-N2G-040GDO
MDD025AN100N2G040GD0
MDD25A-N-100-N2G-040GD0
MDDO25A-N-100-N2G-040GD0
MDDO25A-N-1OO-N2G-O4OGDO
Internal Product Review
The MDD025A-N-100-N2G-040GD0 motor from Bosch Rexroth delivers 0.33 Nm continuous torque and operates at a nominal speed of 10000 min⁻¹. It features resolver feedback, a plain shaft with seal, and a 40 mm centering diameter. This motor is suited for applications in robotics, electronics manufacturing, and medical automation systems.
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