Product Description:

The B-204-B-11 is a brushless servo motor manufactured by Kollmorgen as part of the Kollmorgen Goldline B and BH Motors series. It serves as the rotary actuator in automated machinery where precise speed and torque regulation are demanded by the motion controller. A four-pole rotor and a weight of 6.2 kg allow the motor to fit medium-duty axes without adding excessive mass to the moving structure.

This model develops a back electromotive force of 51.2 VRMS/kRPM; the voltage constant affects drive selection because it reflects the generated counter-voltage at any given speed. During continuous operation the windings can carry 5.3 A RMS, a limit that sets the thermal steady state together with the 2.48 Ω DC resistance and the 20-minute thermal time constant. At a rated speed of 3600 RPM, the shaft can deliver up to 1.6 kW while maintaining a continuous stall torque of 4.47 N-m. These values suit applications such as indexing tables or conveyor rollers. Static friction is 0.10 N-m, indicating minimal breakaway torque when closed-loop control initiates motion. The drive bus may supply as much as 250 VRMS, providing electrical headroom before insulation limits are reached.

For short, high-demand moves the motor endures a peak torque of 13.8 N-m while the drive can momentarily source 17.2 A RMS. These transient ratings permit rapid acceleration without thermal damage. Coil inductance of 38.0 mH shapes current rise time and influences the tuning bandwidth of the current loop. The rotor’s kinetic characteristics are governed by an inertia of 0.0001729 kg-m², enabling quick speed reversals with moderate controller gain. Torque sensitivity is 0.85 N-m/A RMS, so commanded current translates predictably into mechanical output during closed-loop operation.