Product Description:

The B-808-C-21-015 is a brushless servo motor produced by Kollmorgen and supplied within the Kollmorgen Goldline B and BH Motors series. In automated production lines, it supplies closed-loop rotary motion. It links directly to digital servo drives so positioning tables, gantry axes, or spindle heads can follow precise speed and torque commands. This arrangement supports accurate speed regulation and repeatable torque delivery on multi-axis equipment that depends on coordinated motion.

This model delivers a continuous shaft torque of 158 N-m at 25 °C while drawing a continuous phase current of 47.4 A RMS. At a rated speed of 1000 RPM, the motor outputs 15.1 kW, equivalent to 20.3 HP, giving it the power density used on medium-frame machine tools. Its back electromotive-force constant is 191 VRMS/kRPM, which indicates the generated voltage per unit speed and helps with drive voltage selection. Phase inductance of 8.05 mH and a DC winding resistance of 0.168 Ω affect electrical time constants and copper losses during continuous operation. When ambient temperature rises to 40 °C, continuous torque capability moderates to 149 N-m to stay within thermal limits. A torque constant of 3.15 N-m/A RMS links commanded current to produced torque, and the stator design is intended for use with matched Kollmorgen amplifiers.

Dynamic events are handled by a peak torque of 422 N-m that can be delivered when the drive supplies a peak current of 134 A RMS. The rotor’s inertia is 0.0168 kg-m², enabling responsive acceleration without creating excessive load on the control loop. Maximum applied bus voltage is limited to 250 VRMS, providing headroom against the 191 VRMS/kRPM back-EMF during deceleration. Mechanical integration uses a 215.00 mm mounting bolt circle, and the motor face is drilled with standard flange patterns for direct mounting.