Product Description:

The B-204-C-23 is a brushless servo motor produced by Kollmorgen within the Kollmorgen Goldline B and BH Motors series. This servo motor is intended for precision industrial automation, delivering controlled torque and speed when paired with a compatible digital drive. In assembly cells, packaging lines, or material-handling axes, it converts electrical power into rotational mechanical output and offers electrical characteristics suited for closed-loop motion control.

The motor's electrical parameters show how it interfaces with its drive. A back-electromotive force constant of 29.6 Vrms/kRPM sets the relationship between rotor speed and generated voltage, which is important for drive voltage scaling. At 25 °C, the motor can hold a continuous stall torque of 5.1 N-m, while at 40 °C the rating drops to 4.79 N-m as winding temperature rises. The phase-to-phase resistance is 0.786 Ω, and the winding inductance measures 12.0 mH; these values affect current rise time and servo loop bandwidth. When operated with up to 250 Vrms line-to-line supply, the four-pole rotor produces smooth sinusoidal back EMF. Static friction is 0.1 N-m, and viscous damping is 0.009 N-m/kRPM, which helps reduce hunting at low speed.

The housing length is 275.8 mm, and the mounting flange uses a bolt circle of 100.00 mm for interchange with other Goldline frames. A mass of 6.2 kg adds stiffness against vibration while keeping payload manageable on moving axes. The rotor's reflected inertia is 0.0001729 kg-m², which supports quick acceleration without excessive drive current. Thermal transfer from the windings to the frame is represented by a resistance of 0.68 °C/W, supporting continuous operation when ambient air is properly ventilated. For each ampere of RMS current, the motor produces 0.49 N-m/A of torque, which gives a predictable torque constant for drive setup.