Product Description:

The M-203-B-23 is an AC servo motor produced by Kollmorgen within the M Goldline Servo Motors series. This three-phase unit converts drive current into precise mechanical motion for positioning tables, pick-and-place heads, and coordinated axes in industrial automation. By integrating a permanent-magnet rotor and a feedback device, the motor supplies closed-loop torque and velocity so the control system can regulate acceleration profiles and hold commanded positions without mechanical backlash.

The motor delivers a continuous stall torque of 2.44 N-m, allowing it to hold a load steadily at zero speed without overheating. Under nominal operating conditions, it reaches a rated speed of 3800 RPM, enabling high-cycle machinery to complete moves quickly. At that speed, the shaft produces 1.0 kW of mechanical power, matching medium-frame amplifiers used on packaging or inspection stations. A torque constant of 0.81 N-m/A RMS links commanded current to output torque. The associated back electromotive force of 49.0 Vrms/kRPM must be considered when sizing the drive’s DC bus and regeneration components. Copper resistance of 6.98 Ω and thermal resistance of 0.81 °C/W indicate internal heating characteristics during continuous duty.

Peak dynamic needs are covered by a short-term torque of 7.38 N-m, giving nearly a 3:1 margin over continuous capability for rapid indexing or shock loads. The amplifier has to supply a continuous line current of 3.0 Arms and tolerate higher transient demands that follow the motor’s low rotor inertia of 0.000836 kg-m². A phase inductance of 68.0 mH slows current ripple, supporting stable current loops even with long cable runs. The winding temperature rises according to a thermal time constant of 18 min, allowing repetitive moves before steady-state limits are reached. The motor weighs 5.0 kg, measures 275.8 mm in overall length, and uses a shaft without a rear extension to suit close-coupled gearboxes.