Product Description:

The 6SM 27LL-4500 is a synchronous servo motor manufactured by Kollmorgen within the 6SM Synchronous Servo Motors series. The motor is designed for closed-loop positioning and velocity control in assembly lines, electronic component insertion equipment, and laboratory automation. It couples to a compatible drive to move light industrial loads with repeatable accuracy.

Under continuous duty, the shaft reaches a rated output of 0.34 kW while turning at a rated speed of 4500 rpm. At this operating point, the motor supplies a rated torque of 0.72 Nm and draws a rated current of 0.79 A; short overloads can be accommodated up to a peak current of 3.7 A. Six motor poles interact with the stator windings, and a two-pole resolver feeds position data back to the drive. Electrical dynamics are shaped by a winding inductance of 42 mH and a winding resistance of 37 Ω, which influence current rise time and copper loss at the switching frequencies used in modern pulse-width modulation inverters.

The motor maintains controlled torque at zero or low speed. When energized but held stationary, it can produce 0.8 Nm of standstill torque with a standstill current of 0.82 A. Breakaway from rest is aided by a low static friction torque of 0.02 Nm, allowing smooth servo transitions. The electromagnetic design provides a torque constant of 0.98 Nm/A, so incremental current commands produce predictable torque changes. Mechanical responsiveness is supported by a rotor inertia of 0.14 kg·cm², enabling rapid acceleration of lightweight loads, while the motor weighs 1.45 kg for installation on moving axes. A thermal time constant of 22 minutes describes the warming rate of the windings and supports duty-cycle planning within permissible temperature limits.