Product Description:

The BH-626-E-41 is a brushless servo motor produced by Kollmorgen within the Goldline B and BH Motors series. The unit is intended for closed-loop industrial automation where precise velocity and position control are required. When paired with a suitable drive, it delivers regulated torque to conveyors, pick-and-place heads, or servo presses, offering high dynamic response without mechanical commutation. Its electromagnetic design supports rapid acceleration while maintaining thermal stability in production environments.

Under rated conditions, the motor can produce a continuous stall torque of 35.4 N-m, allowing it to hold static loads on gearless axes without overheating. This torque is sustained while drawing a continuous stall current of 19.7 Arms, a parameter used when setting current limits in the drive. The electromagnetic conversion factor, or torque constant, is 1.8 N-m/Arms, meaning each ampere supplied generates 1.8 newton-meters of torque. During motion, the windings generate a back electromotive force of 109 Vrms/kRPM, so the drive must supply a DC bus voltage above that value at the intended speed. Coil inductance is measured at 10.7 mH, which influences current ripple and the bandwidth of the current control loop.

During rapid indexing or shock loading, the motor can withstand a peak stall torque of 126 N-m while accepting a peak stall current of 73.8 Arms for short durations. Its rotor inertia of 0.00304 kg-m² provides a balance between quick acceleration and load stability, which is useful on mid-mass gantry axes. With six magnetic poles, the electrical cycle frequency remains moderate, which helps ease drive filtering and limit iron losses. Static friction is specified at 0.94 N-m, and viscous damping is 0.15 N-m/kRPM, both of which affect velocity-loop behavior. Winding temperature rises slowly thanks to a thermal time constant of 38 min, and safe operation is permitted at ambient temperatures up to 40 °C with a phase resistance of 0.43 Ω at 25 °C.