6SM 71-K-3.000 Kollmorgen
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The Kollmorgen 6SM 71-K-3.000 is a synchronous servo motor from the 6SM Synchronous Servo Motors series. It features a rated power of 3.0 kW, a rated speed of 3000 min-1, and a rated torque of 9.5 Nm. The motor has a peak current of 32.0 A and weighs 11.7 kg.
Internal Product Review
The 6SM 71-K-3.000 is a Kollmorgen synchronous servo motor with 3.0 kW rated power and 3000 min-1 rated speed. Rated torque of 9.5 Nm and standstill torque of 10.5 Nm support confident performance in dynamic motion applications. A 32.0 A peak current rating adds strong overload capability, making this motor a highly capable servo solution.
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Product Description:
The 6SM 71-K-3.000 is a synchronous servo motor produced by Kollmorgen for the 6SM Synchronous Servo Motors series. As a rotary actuator, it converts three-phase electrical power into controlled shaft motion for positioning, indexing, and speed regulation tasks on packaging lines, pick-and-place modules, and similar automation equipment. The design employs six magnetic poles on the rotor and a two-pole resolver, allowing the drive to calculate precise electrical angles and maintain closed-loop accuracy during continuous or cyclic operation.
With a rated output of 3.0 kW, the motor supplies continuous power to medium-sized axes while maintaining a compact frame size. At a shaft speed of 3000 rpm, it delivers a sustained torque of 9.5 Nm with a phase current of 7.6 A. For rapid acceleration, the inverter may apply up to 32.0 A of peak current, expanding the speed-torque range during short bursts. The six-pole design, 19.6 mH winding inductance, and 1.65 Ω resistance help smooth current waveforms and reduce ripple. The voltage constant is 112 mV per rpm, indicating the back electromotive force that the drive must overcome as speed rises. A thermal time constant of 25 minutes indicates how quickly the winding temperature responds to changes in load.
When the shaft is locked, the unit produces 10.5 Nm with a standstill current of 8.0 A, allowing the motor to hold a static load without a mechanical brake. A torque constant of 1.31 Nm/A allows the controller to calculate output torque directly from the commanded current. Dynamic response is supported by a rotor inertia of 20.0 kg·cm², balancing quick acceleration with mechanical stability. The overall weight of 11.7 kg limits structural loading on machine frames. The resolver returns real-time position data so the velocity and position control loops remain tightly regulated as process demands vary.
