Product Description:

The B-206-A-31 servo motor is produced by Kollmorgen within the Goldline B and BH Motors series. As a brushless, permanent-magnet unit, it provides velocity and position control for automated machinery such as pick-and-place axes, indexing tables, and packaging stations. The frame, winding, and feedback options available across the series allow motor torque to be matched to drive ratings while retaining the same mounting outline. In typical installations, the motor couples to a Kollmorgen SERVOSTAR amplifier to form a closed-loop system that responds rapidly to command profiles.

The motor has a back electromotive force constant of 130.2 Vrms/kRPM, which lets the drive calculate speed from generated voltage during dynamic braking. A torque constant of 2.15 N-m/Arms links developed torque to phase current, and the continuous stall current of 3 Arms supports a steady-state stall torque of 6.90 N-m at 25 °C, falling to 6.51 N-m at 40 °C as copper temperature rises. Winding resistance of 8.82 Ω and inductance of 130 mH limit current rise and contribute to electrical damping of the PWM waveform. The four-pole rotor has 0.000251 kg-m² of inertia, and rated mechanical output reaches 970 W on a 230 Vac bus. The thermal network has 0.64 °C/W resistance with a 21-minute time constant, so stator temperature rises gradually during overload.

The insulation system is rated for a maximum line input of 250 Vrms, giving margin for regenerative voltage excursions. During rapid index moves, the amplifier may deliver a peak stall current of 10 Arms, which corresponds to a peak stall torque of 20.5 N-m for short bursts that remain within the thermal limit. The motor weighs 7.6 kg, so the mounting structure must support both the motor mass and the reaction torque created during acceleration. Couplings and machine brackets should be sized for short-duration peak loading as well as continuous servo operation.