Product Description:

The B-802-B-21-B3-E1 is a brushless servo motor produced by Kollmorgen within the Kollmorgen Goldline B and BH Motors series. The unit converts controlled current from a matching drive into precise mechanical rotation for indexing tables, packaging axes, and other automation tasks that demand high torque density. By integrating an electromagnetic brake and a sealed housing, the motor can hold load positions and operate in washdown or particulate environments typically found on production lines.

In continuous duty, the motor can deliver 40.7 N·m of stall torque while drawing 32.4 A rms. These paired values indicate the thermal operating point that the drive must support without exceeding the winding limits. At its rated speed of 2750 rpm, the shaft transmits 10,100 W of mechanical power, allowing direct coupling to high-inertia loads. A torque constant of 1.26 N·m/A rms simplifies current-loop tuning by establishing a near-linear relationship between commanded current and produced torque. The motor has a DC resistance of 0.2 ohms and a phase inductance of 9.4 mH, which influence dynamic current rise times. A back-EMF constant of 76 Vrms/krpm determines the voltage margin required from the inverter, while the rotor inertia of 0.00488 kg·m² balances acceleration capability against speed regulation accuracy.

During transient moves, the electromagnetic structure supports a peak stall torque of 129.2 N·m, providing headroom for rapid indexing without demagnetization. The integrated holding brake supplies 48 N·m of static torque and operates on 24 VDC. Its additional inertia of 0.000127 kg·m² and added length of 56.4 mm must be considered when sizing an axis for precise stopping and holding. The housing is sealed to IP65, protecting the internal laminations against dust ingress and low-pressure water jets. A tempered steel shaft with a diameter of 32 mm transmits torque to the connected coupling.