Product Description:

The B-406-B-21-B2 is an AC brushless servo motor manufactured by Kollmorgen and supplied as part of the Kollmorgen Goldline B and BH Motors series. It is intended for closed-loop industrial automation where accurate speed profiles and repeatable positioning are required on packaging lines, material-handling gantries, and similar multi-axis systems. By combining a permanent-magnet rotor with an integrated holding brake, the unit delivers controlled rotational energy directly to gearheads, ball screws, or belt stages driven by compatible digital drives.

The motor’s stator is wound for a nominal supply of 230 VAC, allowing it to operate with standard three-phase servo amplifiers. At that supply, it produces a back electromotive force of 58.8 VRMS/kRPM, which is the generated voltage per 1000 rpm and should match the controller’s DC bus. The electromagnetic conversion efficiency is expressed by a torque constant of 0.98 N·m/A RMS, meaning nearly one newton meter is produced for every ampere delivered. Under continuous duty, the winding carries 19.1 Arms and sustains a stall torque of 18.6 N·m without overheating. A phase resistance of 0.44 Ω and a phase inductance of 12 mH set the electrical time constant that the current loop must accommodate.

Rated mechanical output reaches 5.5 kW at the shaft when the rotor turns at 3200 RPM. Rotor inertia is 0.000929 kg·m², which supports a balance between dynamic response and load stability, while the thermal path from winding to frame is limited to 0.32 °C/W, which indicates how quickly heat passes to the housing. For short transients, the motor can deliver a peak stall torque of 49.5 N·m, providing additional force during acceleration events. The integrated permanent-magnet holding brake engages at 90 VDC, draws 0.28 A, and secures loads with 8.0 N·m of static torque, while its added inertia of 5.86 × 10⁻⁵ kg·m² has only a small effect on servo bandwidth.