Product Description:

The 23.SM.200-42B0 is a synchronous servo motor produced by KEB within the SM Synchronous Servo Motors series. The unit is intended for closed-loop positioning and velocity regulation in compact automation axes that convey light loads at high cycle rates. Its B5 IFT5 flange allows direct mounting to gearheads or machine frames, while self-cooling eliminates the need for external fans. This arrangement provides a compact electromechanical actuator for decentralized drive systems where installation space is limited.

The motor has a rated mechanical output of 0.25 kW while the shaft turns at 4500 rpm and delivers a continuous torque of 0.55 Nm. Under these operating conditions, the windings draw a phase current of 1.15 A, which the recommended KEB Controller 03 can supply without reaching its current limit. The rotor inertia of 0.11 kg·cm² supports rapid acceleration in pick-and-place systems while helping reduce overshoot during short positioning cycles. A conductor cross section of 1.5 mm² (AWG 14) is suitable for this current range. The flange centers the motor frame precisely to support concentric alignment with coupled machinery and reduce unnecessary loading on the shaft and bearings.

The stator is designed for operation from a link voltage of 230 V, allowing the drive to use standard single-phase or rectified three-phase power sources. When the shaft is locked, the motor produces a stall torque of 0.6 Nm while drawing a stall current of 1.20 A, allowing the axis to hold its position without a mechanical brake. The motor has a back-EMF slope of 44.0 V/1000 rpm, which supports drive-side voltage scaling across the operating speed range. Copper losses are influenced by a phase resistance of 19.7 Ω, while a winding inductance of 17.0 mH helps filter current ripple. The aluminum housing weighs 1.25 kg, keeping the assembly relatively light for compact machine axes. Its shaft uses a DIN-compliant feather key to provide secure torque transmission to a coupling, pulley, or gearbox.