Product Description:

The 2VM62-000-2 DC servomotor is built by Pacific Scientific within the Low Inertia PMDC Servomotors series. It uses Alnico V-7 permanent magnets to create field flux and is supplied without an analog tachometer or optical encoder, so position or speed feedback can be added externally to suit the control scheme. Designed for low-mass loads, the motor uses open-frame cooling with no integral fans or liquid jackets, keeping inertia low and the overall envelope size minimal while still delivering the torque required for precise industrial motion tasks in compact axes.

At its nominal operating point, the armature sees 24 V and a rated current of 4.5 A, producing 21 oz-in (0.148 Nm) of continuous torque at the shaft while the rotor turns at a rated speed of 3475 rpm. The back EMF constant is 3.92 V/kRPM, allowing drive electronics to infer speed from generated voltage when separate transducers are omitted from the control loop. With no mechanical load, the motor rises to 5865 rpm, supported by its low electrical time constant and the direct cooling path of the open frame during free running. A pulse current limit of 22 A accommodates short acceleration bursts and supports rapid speed changes without exceeding magnet temperature limits.

During standstill, the armature can be energized continuously to deliver 22 oz-in (0.155 Nm) of stall torque without demagnetizing the Alnico field, and the winding produces 5.3 oz-in/A for each ampere of current, which simplifies drive current calculations. Electrical losses are governed by a cold resistance of 1.59 ohms, while dynamic current changes are shaped by an armature inductance of 265 µH during transients. The laminated rotor carries only 3.3 × 10⁻⁶ kg·m² of inertia, allowing fast reversals under the specified 22 A pulse ceiling during acceleration and reversal. Because the frame has no added blowers, thermal limits must be managed through duty-cycle control rather than forced convection.