Product Description:

The B-604-C-A1 is a brushless servo motor produced by Kollmorgen for the Kollmorgen Goldline B and BH Motors series. It serves as a primary drive element in automated axes, translating controlled current into rotational motion for packaging equipment, robotic joints, and machine tools. A six-pole internal rotor promotes even torque production across the electrical cycle, while the 23.1 kg mass provides structural stiffness without adding excessive installation weight. The model is intended for processes that demand rapid indexing and continuous-duty operation.

During sustained operation, the motor can develop a continuous stall torque of 31.2 N·m while drawing 39.4 A RMS from the drive. At the rated speed of 4300 rpm, the motor provides a mechanical output of 8.6 kW, offering a favorable torque-to-speed range for medium-power motion stages. The windings support a maximum line supply of 250 V RMS. Within this limit, the 0.126 Ω DC resistance and 3.3 mH inductance keep copper loss and current ripple within servo-grade tolerances. The torque constant of 0.79 N·m/A RMS links commanded phase current to shaft torque, allowing predictable closed-loop tuning. A 33-minute thermal time constant moderates temperature changes, enabling the motor to absorb brief load surges without exceeding its winding temperature limits.

For rapid acceleration, the motor accepts a momentary current of 114.8 A RMS, permitting a peak shaft torque of 86.4 N·m during quick starts or emergency maneuvers. The back-EMF constant of 47.9 VRMS/kRPM indicates the voltage generated per unit of speed and assists with drive selection for regenerative operation. A rotor inertia of 0.002034 kg·m² keeps stored kinetic energy low, while a theoretical acceleration of 42,500 rad/s² supports high-bandwidth position control. During dynamic bursts, the electromagnetic design maintains commutation accuracy, but the duty cycle must remain limited to prevent the windings from overheating.