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R911255084 (MDD090A-N-020-N2L-110GB1)

MDD Synchronous Motors

Rated 4.0 stars (12 total reviews)
  In-Stock, Ships 3-5 Days
Expedited Lead Times on Select Parts
1 Year Warranty Included
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Expedited Lead Times on Select Parts
1 Year Warranty Included
Free Ground Shipping
The Bosch Rexroth MPN R911255084 (MDD090A-N-020-N2L-110GB1) is an MDD090A AC servo motor configured for digital drive controllers. It features a centering diameter of 110 mm, a plain shaft with a shaft seal, and a side B connector. The motor delivers a maximum torque of 19 Nm and a continuous torque at standstill of 3.7 Nm, with a nominal speed rating of 2000 min⁻¹. Nominal current is 21.9 A, and standstill current is 4 A. The unit has digital servo feedback, winding resistance of 6.84 ohms, an IP65 protection rating, and a thermal time constant of 45 minutes. Its holding brake provides 6.5 Nm holding torque. Total mass is 12.5 kg, including a 0.5-kg blocking brake. It is designed to operate within ambient temperatures from -20°C to +80°C.

Technical Specifications

Centering Diameter
110mm

Output Shaft
Plain with sealing ring

Max Torque Output
19 Nm

Current Consumption
21.9 A

Nominal Speed
2000 revolutions per minute

Constant Torque at Standstill
3.7 Nm

Constant Current
4Nm

Temperature Range for Transportation
-20 to +80 degrees Celsius

Feedback
Digital Servo

Winding Resistance
6.84 ohms

Thermal Time Constant
45 minutes

Power Connection
B-side

Torque Constant
0.93 Nm/A

Balance Class
N

Insulation Class
F

Housing Design
Natural and Surface Cooling

IP Classification
IP65

Weight
12.5 kg

Moment of Inertia
20 x 10-4 kgm2

Coat Thickness
40 microns

Holding Brake
0.5 kg

Holding Torque
6.5 Nm.

What influence does the black prime coat (RAL 9005) have on the MDD090A-N-020-N2L-110GB1 motor’s environmental resistance?

The black prime coat (RAL 9005) adds an extra layer of protection against environmental stressors such as UV radiation, moisture, and corrosion, extending the motor's lifespan in challenging operating conditions.

Why does the 27.7 mH windings inductance affect motor control in high-speed operations?

The 27.7 mH windings inductance can slow down the motor's response to rapid speed changes, introducing delays in high-speed operations and potentially affecting precision in fast dynamic systems.

What impact would the 21.9 A maximum current have on motor efficiency?

The 21.9 A maximum current indicates the motor's capacity for high power output but could also lead to efficiency losses at full load, especially in prolonged operation, requiring careful heat management.

How does the housing design (suited for natural convection and surface-cooling) influence the motor’s temperature management?

The natural convection and surface-cooling design enhance heat dissipation in the motor without the need for external cooling systems, though it may not be sufficient in high-load conditions, requiring additional cooling solutions.

How would the balancing class Standard (R per DIN VDE) affect motor operation?

The balancing class Standard (R per DIN VDE) ensures that the motor operates smoothly with minimal vibrations, enhancing long-term performance and reliability in high-speed applications.

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Internal Product Review

Rexroth Indramat makes the MDD090A-N-020-N2L-110GB1 motor has a protection category of IP65 and an F insulation classification. It features a black prime coat housing and operates within a maximum installation elevation of 1000 meters. The motor is ideal for demanding conditions and precise control.

Warranty

1-year-warranty
Indramat USA 1 Year Warranty

Repair

product repair We offer a repair service for the MDD090A-N-020-N2L-110GB1.
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