Product Description:

The U12DNU-A/PA1130 is a servomotor produced by Kollmorgen and placed in the PLATINUM U Servomotors series. It is intended for closed-loop motion tasks in industrial automation, where precise rotary positioning and velocity regulation are needed for axes in assembly cells, electronic component insertion, or metering pumps. This type of motor is commonly used where a controller must start, stop, and reverse an axis with predictable response. By converting low-voltage DC from a matched drive into controlled shaft torque, the motor fits machine frames without additional gearing and supports repeatable moves while the drive monitors current and temperature.

Electrical characteristics show how the motor pairs with a drive amplifier. The rated terminal voltage is 43.3 V for continuous duty, and at that voltage the armature draws a rated current of 8.8 A. For short acceleration surges, current can rise to 85 A. Internal copper losses are influenced by an armature resistance of 0.610 ohms, while the external leads add a measured terminal resistance of 0.750 ohms. The resistance values are useful when estimating voltage drop and heating in the motor circuit. During rotation, the windings generate a back electromotive force of 12.1 V/KRPM, so the controller must supply additional voltage as speed increases.

Mechanical output includes a continuous stall torque of 130 oz-in, which allows the shaft to hold moderate loads without exceeding its thermal limit. The motor has a frame diameter of 139.7 mm and an overall body length of 53.3 mm, which helps it fit compact servo stages. Under nominal excitation, the rotor reaches 3000 RPM and delivers a rated mechanical power of 284 W. These values suit small conveyors, actuators, and index tables that need steady torque and controlled speed. The combination of compact size and controlled output supports light to moderate servo duties where accurate motion is more important than high continuous force.