Product Description:

The B-604-B-91-B3R500-008 is a brushless permanent-magnet servo motor produced by Kollmorgen for the Goldline B and BH Motors series. This motor is intended for closed-loop positioning and velocity control in industrial automation where high power density and repeatable motion are required. It pairs with Kollmorgen digital drives and integrates an embedded resolver for rotor position feedback, allowing precise speed regulation and repeatable positioning in gantries, packaging axes, material-forming equipment, and other automated machines that require accurate response during frequent start-stop cycles.

At stall, the motor can deliver a continuous shaft torque of 30.1 N-m while drawing a continuous phase current of 27.7 Arms. These values indicate the continuous load the motor can hold at zero speed before heating becomes the limiting factor. A back electromotive force constant of 65.85 Vrms/kRPM links mechanical speed to the drive's voltage requirements, and the torque constant of 1.09 N-m per amp supports current-based torque control. Phase inductance is 6.3 mH, and the DC winding resistance is 0.23 Ω, parameters that influence current ripple and servo bandwidth. For vertical axes, the integral fail-safe brake supplies a holding torque of 48 N-m and engages at a control voltage of 24 VDC, preventing load drift when power is removed.

The motor can respond to rapid accelerations because the rotor inertia is only 0.00203 kg·m², and its peak operating envelope allows 87.7 N-m of torque for short bursts while the drive supplies 84.8 Arms. Continuous operation at the rated speed of 3150 RPM yields 7.7 kW of mechanical output, which suits applications that need sustained power and stable motion at higher shaft speeds. Environmental sealing meets the IP65 rating, so dust ingress and low-pressure water jets do not interfere with normal operation. This protection is useful in industrial settings where the motor may be exposed to airborne particles or occasional washdown splash.