Product Description:

The S31HNNA-HSNS-04 is a 6-pole neodymium magnet brushless servo motor built by Pacific Scientific within the S Brushless Motors series. It serves as a compact drive element for industrial automation, providing controlled rotary motion through electronic commutation and Hall sensor feedback to the positioning controller. When integrated with a matching amplifier, the motor delivers repeatable speed and torque so conveyor axes, indexing tables, and small gantries can follow programmed profiles without the mechanical contact wear found in brushed designs.

For continuous duty, the motor sustains 2.2 Nm of stall torque, giving machines enough holding force at zero speed without overheating. Dynamic transients are accommodated by a peak capability of 6.2 Nm, which supports short accelerations before the thermal limits of its single-stack lamination are reached. The three-phase winding exhibits 10.3 mH of line-to-line inductance and 4.1 Ohms of resistance, figures that shape current rise time and determine the voltage overhead required from the drive. With a winding code H, the magnetic circuit generates 0.7 Nm/ARMS of torque for every ampere supplied, allowing current demand to be estimated quickly. A stack length of one keeps the overall package short while still matching the magnetic loading needed by the six stator poles.

Mechanical integration follows the NEMA 34 frame guideline, so the flange pattern aligns with common gearheads and clamp fixtures in North American equipment. The housing weighs 3.2 kg, and the rotor’s reflected load is 0.18 kgm² × 10⁻³, values that influence drive tuning and system resonance. Electrical back EMF is specified at 0.44 VRMS/rad/sec, enabling straightforward voltage budgeting. Because there is no brake and no shaft seal, ancillary holding devices and external ingress protection must be provided when required.