Product Description:

Pacific Scientific’s S32HNBA-RNVM-00 belongs to the S Brushless Motors series and is a 6-pole neodymium magnet brushless servo motor used for position and speed control in automated machinery. The model integrates a size 21 frameless resolver for primary feedback so a drive can close precise motion loops without an external encoder. Its construction follows the NEMA frame standard, allowing straightforward interchange with other NEMA-listed actuators in conveyor sections, indexing tables, or pick-and-place axes.

The motor delivers a continuous stall torque of 4.0 Nm and can reach a peak torque of 11.3 Nm during rapid acceleration events. Each ampere of phase current generates 0.7 Nm/ARMS, so the servo drive can estimate load from measured current. Electrically, the three-phase winding shows an inductance of 4.5 mH line to line, which filters current ripple and influences current-loop bandwidth. The line-to-line resistance is 1.6 Ohms, which contributes to copper losses at rated duty. A 100 V dc holding brake is integrated to secure the load when power is removed, and the H-type winding adapts the magnetic circuit for this torque class. Power and feedback lines exit through a motor-mounted MS connector, simplifying cable replacement.

The back-EMF slope equals 0.44 VRMS/rad/sec, matching resolver feedback for drive commutation accuracy. The motor has a mass of 4.9 kg, reducing reflected inertia on small gearboxes, while the frame follows the NEMA 34 outline so mounting holes line up with standard brackets. Rotor inertia is 0.34 kgm² ×10⁻³, supporting quick direction reversals in multi-cycle duty. A 2-stack lamination length boosts torque density without extending shaft length. The Viton shaft seal limits dust or fluid ingress at the output flange. Because there is no secondary feedback device, system diagnostics rely on the resolver signal, while the servo still supports tight velocity loops within the programmed bandwidth.