Product Description:

The CH051A-14-3305S is a frameless direct-drive rotary motor built by Kollmorgen for the Cartridge DDR Motors series. This permanent-magnet unit fits into a pre-machined bearing cartridge, allowing the load to attach directly to the rotor without belts or gearheads. Its direct-drive arrangement reduces mechanical backlash and supports precise positioning with short settling times. The motor is suitable for indexing tables, pick-and-place heads, and other automated axes controlled by closed-loop servo systems.

The electromagnetic core produces a continuous stall torque of 11.7 Nm while drawing 4.75 A rms. Its torque constant is 2.49 Nm/A rms, which supports predictable current-to-torque conversion during steady operation. A back EMF constant of 151 V rms/kRPM helps determine drive voltage requirements and regenerative thresholds. Winding inductance is 24 mH, which helps limit current ripple with fast pulse-width modulation carriers. Copper resistance at 25 °C is 4.13 Ω and contributes to winding heat under load. With a 400 VAC supply, the motor delivers a rated power of 2259 W at 2100 rpm, while operation from 480 VAC increases rated power to 2625 W. The ten-pole rotor has 0.16 Nm of static friction, supporting accurate movement during small position corrections and low-speed operation.

Peak stall current rises to 12.8 A rms, and peak stall torque reaches 30 Nm during short overload periods. This temporary capacity supports rapid acceleration when tooling or workpieces create higher inertial demand. Rotor inertia is 0.00274 kg·m², allowing the axis to respond quickly to changing motion commands. The maximum rated speed with the higher supply is 2500 rpm, providing additional velocity for applications with short cycle times. Total motor mass is 8.4 kg, which allows installation in compact machine assemblies while providing sufficient material for structural rigidity and heat transfer.