LSM165-221-454-M-2KA Kollmorgen
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The Kollmorgen LSM165-221-454-M-2KA is part of the LSM Brushless Servo Motors series and provides a continuous torque of 25 Nm with a peak torque of 100 Nm. This motor has a speed of 4500 rpm, uses a motor voltage of 460 V, and weighs 23.3 kg with brake. It features multi-turn absolute feedback and operates with a maximum current of 134.4 A peak.
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Product Description:
The LSM165-221-454-M-2KA brushless servo motor is produced by Kollmorgen as a member of the LSM Brushless Servo Motors series. Designed for industrial automation, it converts drive commands into precise rotary motion so conveyors, indexers, and pick-and-place actuators can meet tight positioning requirements. An onboard brake holds the connected load during a power loss, helping prevent unintended movement on vertical or gravity-loaded axes. Multi-turn absolute feedback provides real-time rotor position to the controller and retains position data after power cycles, eliminating the need for repeated homing moves.
This model supplies a continuous shaft output of 25 Nm when powered from a 460 V winding. It can momentarily accept up to 134.4 A(pk) to overcome startup inertia and support demanding acceleration profiles. Peak overload capability reaches 100 Nm, providing additional torque for rapid changes in speed or load. The motor has a rated top speed of 4500 rpm, allowing it to serve high-speed positioning and material-handling axes. At standstill, the drive must supply 30.3 A(pk) to maintain the magnetic field, which affects inverter and cable selection. Eight stator poles interact with the permanent-magnet rotor to support smooth torque production, while the 0.33 Ω phase resistance contributes to copper losses during sustained operation. A voltage constant of 109 V/krpm indicates the back electromotive force generated as speed increases and helps establish the required bus voltage margin.
The rotor inertia with the brake installed is 0.002 kg·m², supporting quick reversals while limiting overshoot during controlled motion. The motor has a torque constant of 0.91 Nm/A, so torque increases in proportion to phase current under vector control. Its three-phase winding has an inductance of 3.6 mH, which moderates current ripple during high-frequency pulse-width modulation. The total mass with the brake installed is 23.3 kg, placing a substantial static load on the mounting surface and associated supports. The brake coil operates from 24 VDC and must be connected to a suitable brake control circuit. The shaft end has an M10 × 1.5 mm thread that provides a defined mechanical attachment point for compatible fixtures or coupling hardware.
