Product Description:

The 3N63-000-2 permanent-magnet DC servomotor is manufactured by Pacific Scientific for the Low Inertia PMDC Servomotors series. It provides controlled rotary motion for small conveyors, pick-and-place axes, and indexing fixtures found in automated cells. The low-inertia armature lets the coupled drive apply rapid velocity changes with minimal overshoot, supporting tight position loops that are common in packaging, electronics assembly, and light material-handling machinery. The device connects to brushed servo amplifiers that modulate armature current to deliver the commanded torque profile.

During continuous operation, the motor accepts an armature supply of 30 V, draws 5.3 A rms, and turns at 3980 rpm while producing 0.23 N·m of shaft torque. These values correspond to a mechanical output of 97 W. A terminal resistance of 1.29 Ω at 25 °C governs steady-state current, and the 210 µH rotor inductance shapes PWM-driven current ripple. Continuous stall torque is 0.247 N·m, which can be held indefinitely provided that the 61 W thermal dissipation limit is respected. Response to command changes is rapid because the electrical time constant is only 0.16 ms and the mechanical time constant is 1.4 ms, allowing fine tracking of reference signals in very short time intervals.

At zero external load, the shaft accelerates to 5000 rpm, a speed primarily limited by the back-electromotive force constant of 5.85 V/kRPM, which sets the rise in armature voltage as speed increases. For fast indexing moves, the drive may supply pulse currents up to 36 A, and torque scales linearly with the constant of 0.056 N·m/A. The extremely light rotor, rated at 3.3×10⁻⁶ kg·m², supports high acceleration and deceleration rates. This allows repetitive start-stop duty cycles while staying within the motor’s thermal limits and without exceeding bearing load limits.