Product Description:

The B-404-B-A3-B2 is a brushless servo motor manufactured by Kollmorgen as part of the Goldline B and BH Motors series. It is intended for precision rotary positioning in automated machinery, allowing motion controllers to synchronize speed and torque with high repeatability across production cycles. The frame carries an integral permanent-magnet rotor and a normally engaged holding brake, giving the motor both dynamic acceleration and secure shaft lockout when power is removed.

This model reaches a rated shaft speed of 2500 RPM, allowing mid-range surface velocities for conveyors, feeders, and similar loads. At the same operating point, it can deliver 3.4 kW of mechanical power, so the connected drive can be sized accordingly. When the housing is at 40 °C, the motor sustains a stall torque of 13.3 N-m, supporting constant-tension duties without overheating. Continuous operation draws 9.9 Arms, and the electromagnetic design converts that current into torque with a sensitivity of 1.34 N-m/A RMS. These values describe the continuous operating range and must be matched to cabling, fusing, and cabinet thermal management.

Transient demands are covered by a peak torque capacity of 36.6 N-m, giving control loops headroom for acceleration bursts or load disturbances beyond the continuous region. Back EMF rises at 81.2 VRMS/kRPM, a value used to scale DC bus voltage and regenerative braking limits. The phase inductance of 33.5 mH shapes current ripple and influences the bandwidth of current regulators, while a rotor inertia of 0.000656 kg-m² balances dynamic response against load coupling. Complementary details such as the 90 VDC brake, 8.0 N-m holding torque, and 130 mm mounting bolt circle complete the mechanical interface without changing the continuous or peak electrical ratings.