Product Description:

The B-402-B-A3 is a permanent-magnet synchronous motor manufactured by Kollmorgen and assigned to the Kollmorgen Goldline B and BH Motors series. In servo systems, it acts as the drive element that converts the regulated output of a matched amplifier into precise rotary motion for machine axes, material-handling equipment, and other automated assemblies. This supports repeatable torque and speed control.

At its rated operating point, the motor turns at 3000 RPM while producing a mechanical output of 2.2 kW. Continuous phase current is limited to 6.4 A RMS, and with adequate drive capacity, the windings can withstand 18.8 A RMS for short intervals to produce the peak torque of 19.8 N·m. The device sustains 7.4 N·m of stall torque at 25 °C and 6.8 N·m when the winding temperature rises to 40 °C, allowing position holding without movement under load. A torque constant of 1.11 N·m/A RMS links commanded current to delivered torque, and the peak-to-continuous current ratio provides transient acceleration for indexing tasks. The rated point falls within a maximum line voltage envelope of 250 VRMS, so the motor pairs with standard Goldline drives.

Its electrical model includes a phase-to-phase inductance of 50 mH and a resistance of 2.60 Ω, values that shape current ripple and influence servo loop bandwidth. The back electromotive force constant is 67.2 VRMS/kRPM, giving predictable voltage feedback for commutation as speed increases. Dynamic response is aided by a rotor inertia of 0.000323 kg·m², which balances load matching with fast acceleration. Mechanically, the frame uses a 130.00 mm mounting bolt circle and spans an overall length of 265.5 mm, simplifying interchange with other Goldline motors. Total mass is 8.4 kg, which helps limit added load in gantry or articulated arm installations. All parameters remain within the drive's insulation and thermal limits when connected to a 250 VRMS bus.