LSM165-221-454-S-2KA Kollmorgen
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The LSM165-221-454-S-2KA is a brushless servo motor manufactured by Kollmorgen as part of the LSM Brushless Servo Motors series. This motor delivers a continuous torque of 25 Nm and a peak torque of 100 Nm, with a speed of 4500 rpm and a peak current of 134.4 Amps. It features an 8-pole design, a single-turn high resolution feedback type, and has a net weight of 23.3 kg.
Internal Product Review
The LSM165-221-454-S-2KA is a Kollmorgen brushless servo motor with 25 Nm continuous torque and 100 Nm peak torque. Single-turn high-resolution feedback and 4500 rpm speed support precise motion control and strong dynamic response in servo applications. A well-balanced motor design for demanding axes, highlighted by a 0.91 Nm/A torque constant.
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Product Description:
The LSM165-221-454-S-2KA is a brushless servo motor produced by Kollmorgen within the LSM Brushless Servo Motors series. As an electromechanical actuator, it transforms drive current into precise rotary motion for positioning axes and cyclic machinery in automated production lines. The motor is intended for closed-loop applications where continuous torque, encoder feedback, and an integrated brake support accurate movement and secure load holding. Its operating characteristics make it suitable for machinery that requires rapid acceleration, repeatable positioning, and stable performance during frequent start-and-stop cycles.
The motor delivers a continuous shaft torque of 25 Nm, allowing machinery to sustain a steady load without overheating. At a rated speed of 4500 rpm, the electromagnetic design supports rapid cycle times so indexers and spindles can reach their commanded speeds quickly. The maximum phase current is 134.4 A peak, which must be considered when selecting the inverter and bus capacity for acceleration. Dynamic response is aided by a rotor inertia of 0.002 kg-m², minimizing the energy required to change speed and reducing settling time. The torque constant is 0.91 Nm/A, linking commanded current to the torque produced by the motor. An eight-pole rotor, a stall current of 30.3 A, and a voltage constant of 109 V/krpm further characterize its electrical operation.
Short-duration overloads are supported by a peak torque capability of 100 Nm, providing additional force for demanding acceleration or stopping events. The integrated brake operates at 24 VDC and secures vertical loads when the drive is disabled. A winding inductance of 3.6 mH helps moderate current ripple in the power stage during pulse-width modulation. The winding resistance is 0.33 Ω, which affects copper loss and heat generation while current passes through the motor. Mechanical output is transferred through an ST-60 steel shaft, providing a durable connection point for the driven assembly. The shaft includes an M10 × 1.5 mm thread machined to a depth of 22 mm for compatible coupling accessories.
