Product Description:

The B-404-C-21-034 is a brushless AC servo motor manufactured by Kollmorgen within the Kollmorgen Goldline B and BH Motors series. It serves as the rotary actuator in industrial automation cells, translating electric drive current into regulated shaft torque for indexing tables, gantry axes, and packaging spindles. The frameless permanent-magnet topology supports direct coupling to gearboxes or driven loads, and the motor pairs with SERVOSTAR amplifiers to close the velocity and position loop required in high-throughput production lines.

Continuous operating data show how the motor behaves under steady load. Its rated mechanical output is 5.4 kW, delivered when the shaft spins at 5000 rpm. At that point, the device draws a continuous line current of 19.8 ARMS and produces a continuous stall torque of 13.1 N·m, providing margin for holding duties without excessive heating. A torque constant of 0.66 N·m/ARMS links drive current to electromagnetic torque, while the phase inductance of 8.4 mH and a DC winding resistance of 0.34 Ω shape current rise time and copper losses. With a 4-pole rotor, the motor sustains smooth rotation, and its static friction of 0.26 N·m keeps idle torque demand minimal.

Dynamic and thermal limits describe short-term performance. During acceleration or shock loading, the shaft can deliver a peak stall torque of 35.3 N·m while the drive may momentarily source a peak line current of 55.9 ARMS. Generated back electromotive force reaches 40.2 VRMS/kRPM, so the supply rails must remain below the maximum line voltage of 250 VRMS to avoid inverter overvoltage. Heat produced under these peaks exits through a thermal path rated at 0.38 °C/W, and the 25-minute thermal time constant shows how slowly the winding approaches equilibrium. These limits support cable sizing and current foldback settings for safe intermittent duty.