Product Description:

Kollmorgen manufactures the B-204-B-21 brushless servo motor within the Kollmorgen Goldline B and BH Motors series. This unit is intended for industrial automation axes that require stable speed regulation and fast torque response, such as pick-and-place gantries or form-fill-seal stations. It converts three-phase drive power into rotary motion by using rare-earth magnets and a low inertia rotor, enabling precise position loops and responsive motion control when paired with a compatible digital amplifier. The sealed housing allows mounting on moving tooling without additional protective covers.

Its nominal mechanical output is 1.6 kW at a rated shaft speed of 3600 rpm, so the motor suits axes that demand high cycle rates. To sustain that load, the stator windings draw 5.3 ARMS of continuous current while generating a stall torque of 4.47 N-m at 40 °C. For rapid acceleration, torque can rise to 13.8 N-m, provided the amplifier delivers the overload current. The system may be supplied from mains or DC buses up to 250 VRMS, and drive selection is supported by a back electromotive force constant of 51.2 VRMS/kRPM, which links speed to generated voltage. Copper resistance of 2.48 Ω and inductance of 38.0 mH govern current ripple and help the servo maintain smooth torque under pulse-width-modulated excitation.

The enclosure carries an IP65 sealing rating, protecting bearings and windings from dust and low-pressure water jets. Dynamic bursts are supported by a peak phase current limit of 17.2 ARMS, and the rotor inertia of 0.0001729 kg·m² allows quick reversals without excessive regenerative energy. The electromagnetic design yields a torque constant of 0.85 N-m/ARMS, while the 20-minute thermal time constant moderates temperature rise during cyclic duty. A hardened steel shaft with a 14.00 mm diameter provides direct coupling to gearheads or belt pulleys, and the total weight of 6.2 kg keeps the motor manageable on moving carriages.