6SM 27LL-4.500 Kollmorgen
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The Kollmorgen 6SM 27LL-4.500 is part of the 6SM Synchronous Servo Motors series and weighs 1.45 kilograms. It features a rated power of 0.34 kW and operates at a rated speed of 4500 rpm with a rated torque of 0.72 Nm. The servo motor has a peak current of 3.7 A and is protected by an IP65 class enclosure.
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Product Description:
The 6SM 27LL-4.500 is a synchronous servo motor from Kollmorgen’s 6SM Synchronous Servo Motors series. It delivers precise position, speed, and torque control for packaging lines, pick-and-place modules, and other automated equipment. Its sealed construction allows it to be mounted directly on machine frames. Compatible Kollmorgen drives supply sinusoidal current for closed-loop operation, allowing the motor to respond accurately to changing motion commands and load conditions.
During continuous operation, the motor draws a rated current of 0.79 A and produces 0.34 kW of output power. At 4500 rpm, the electromagnetic assembly produces a rated torque of 0.72 Nm, while overloads drawing up to 3.7 A of peak current enable fast acceleration. The IP65 housing blocks dust and resists water jets, supporting installation near active machinery. The motor has a phase inductance of 42 mH and a resistance of 37 Ω, which affect current-loop bandwidth and drive selection. Continuous electrical losses must be dissipated through the stator casing to control winding temperature. The winding design keeps copper losses low, supporting full-load duty cycles at ambient temperatures commonly found around industrial control equipment.
At standstill, the drive can supply 0.82 A and generate a holding torque of 0.8 Nm to keep loads stationary. Only 0.02 Nm of static friction must be overcome to start rotation. A torque constant of 0.98 Nm/A provides a nearly linear increase in torque as current rises, while the back-EMF slope of 59 V/1000 rpm helps determine the required voltage margin during regenerative operation. Thermal behavior is moderated by a 22-minute time constant, and the rotor inertia is 0.14 kg·cm². With a mass of 1.45 kg, the motor is suitable for lightweight gantries and compact robotic wrists. Its low rotor inertia and minimal static friction allow the connected axis to reverse direction rapidly during short, repetitive motion cycles.
