Product Description:

The LSM215-451-204-E2-2KA is a brushless servo motor built by Kollmorgen for the LSM Brushless Servo Motors series. It provides high dynamic torque and precise speed regulation for gantry axes, pick-and-place heads, and packaging spindles in automated production lines when paired with a compatible servo drive. At a rated mechanical speed of 2000 rpm, the motor sustains 51 Nm of continuous shaft torque, yet it can produce up to 158 Nm for rapid acceleration cycles.

This output capability is supported by a torque constant of 1.84 Nm/A, meaning each ampere of phase current produces nearly two newton-meters of torque. The drive can command a peak current of 106.1 A during transient operation, and this current level is compatible with the eight-pole rotor and insulated windings. A rotor inertia of 0.00686 kg-m² balances rapid response with load smoothing during changes in speed. The stator has an inductance of 10.0 mH and a resistance of 0.50 Ω, which affect current-loop bandwidth and electrical losses. These characteristics support accurate current control as the motor accelerates, decelerates, or maintains torque under load.

The three-phase stator connects to a 460 VAC bus, and a stall current of 29.7 A peak indicates the continuous current required at zero speed. During rotation, the generated back electromotive force follows a constant of 222 V/kRPM, allowing the servo controller to calculate available voltage margins for field weakening. Position and velocity feedback are supplied through a 2000-line incremental encoder, which supports closed-loop speed regulation and accurate axis positioning. A 24 VDC brake locks the shaft when control power is removed, helping prevent an attached load from moving while the motor is stopped. The shaft end has an M12 × 1.75 mm thread for the appropriate mechanical attachment. The motor weighs 41.7 kg, providing substantial thermal mass for dissipating copper and iron losses without forced cooling.