Product Description:

The CKM20B-AKCNT-00 is a brushless servo motor built by Kollmorgen within the CKM Servo Motors series. Designed for closed-loop positioning and speed control in industrial automation, the unit couples directly to gearboxes or linear actuators where fast response and repeatable accuracy are required. An absolute encoder supplies real-time rotor position to the drive, while dual IP65 connectors provide sealed power and feedback interfaces on the housing. Because the motor is supplied without a brake and does not have a shaft seal, some installations may require an external holding mechanism or a protective cover.

Under continuous duty, the actuator delivers 2.0 kW of mechanical output at a rated shaft speed of 2000 rpm, drawing 9 A of phase current to generate a continuous torque of 9.55 Nm. When short bursts are required, electromagnetic loading rises to a peak torque of 28.65 Nm. A maximum drive current of 27 A supports rapid indexing cycles without stalling. The frame can safely reach 2500 rpm, providing a 25% speed margin for overshoot control. Rotor inertia is 12.14 kg·cm², balancing quick acceleration with load stability during changes in speed or direction.

The back electromotive force constant is 68.89 V/Krpm, indicating how much voltage the motor generates per thousand revolutions per minute. The torque constant is 1.139 Nm/A, providing a reference for current-loop tuning and precise force control. Low copper impedance results from an armature resistance of 0.58 Ω, which helps limit resistive voltage loss across the winding. The winding has an inductance of 3.8 mH, which shapes its dynamic response and attenuates current ripple from high-frequency switching. Stopping energy must be absorbed by the drive or restrained by an external clamp when the axis must remain stationary.