U12DNU-F Kollmorgen
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MPN: 00D12F02107-2
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The Kollmorgen U12DNU-F is a servomotor from the PLATINUM U Servomotors series. It has a peak torque of 1366.4 N-cm and a peak current of 84 A. The motor features a rated power output of 380 W and a rated speed of 3000 RPM, with a maximum recommended speed of 6000 RPM.
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Product Description:
The U12DNU-F is a frameless servo motor produced by Kollmorgen within the PLATINUM U Servomotors series. Supplied as a rotor and stator kit for direct integration into machinery, the unit provides closed-loop torque and speed control for industrial automation axes that need compact construction and low inertia. Because the rotor and stator are installed directly into the machine structure, the design avoids a conventional motor housing and fits applications where space is limited. This arrangement is often used in direct-drive assemblies where the machine already provides the bearing support and surrounding mechanical structure.
The motor has a maximum recommended speed of 6000 RPM, giving the drive section headroom above its rated 3000 RPM operating point. A peak phase current of 84 A supports transient acceleration and can produce a peak torque of 1366.4 N-cm for short bursts. Under continuous duty at 25 °C, the windings carry 8.01 A, which produces the published rated torque while keeping temperature rise within normal limits. The torque constant is 17.4 N-cm/A, linking commanded current from the servo amplifier to mechanical output. Additional electrical data include a 59 V terminal rating, a static friction torque of 4.9 N-cm, and separate armature and terminal resistances of 0.61 Ω and 0.75 Ω, which affect voltage drop and startup behavior when sizing the power stage.
The motor has a rated power capability of 380 W, while an armature resistance of 0.61 Ohms contributes to resistive heating during continuous operation. Its back EMF constant is 18.2 V/kRPM, which indicates the generated voltage as speed rises during regeneration. A stator outside diameter of 139.7 mm and an axial length of 53.3 mm allow installation in confined housings while leaving room for feedback devices and cooling paths. Rated torque decreases to 110.0 N-cm at 40 °C, showing that continuous load capability drops as operating temperature increases. That reduction matters when the axis operates in warmer enclosures or with limited cooling airflow.
Frequently Asked Questions about U12DNU-F:
Q: What is the maximum peak torque produced by the U12DNU-F servomotor?
A: The U12DNU-F servomotor has a peak torque of 1366.4 N-cm for short bursts of high-power output.
Q: What is the rated continuous current of the U12DNU-F servomotor?
A: This motor is rated for a continuous current of 8.01 A during sustained operation.
Q: What is the maximum recommended speed of the U12DNU-F servomotor?
A: The U12DNU-F has a maximum recommended speed of 6000 RPM.
Q: What is the rated power output of the U12DNU-F servomotor?
A: Its rated output power is 380 W for continuous duty cycles.
Q: What is the rated torque of the U12DNU-F servomotor at 25°C?
A: At 25°C, this model provides a rated torque of 123.6 N-cm.
