Product Description:

The S22GNNA-RNNM-00 is a 6-pole neodymium magnet brushless servo motor produced by Pacific Scientific and supplied within the S Brushless Motors series. It is intended for closed-loop motion axes in automated machinery where compact size and consistent torque delivery are required to position loads accurately and repeatably. Power and feedback connections use a motor-mounted MS connector, which keeps external wiring concentrated at the motor housing.

At the shaft, this model delivers a continuous stall torque of 1.0 Nm, while short-duty peaks can reach 2.64 Nm for rapid acceleration profiles. Torque is proportional to current by a constant of 0.7 Nm/ARMS, allowing the drive to estimate mechanical output from electrical demand. The three-phase stator has a line-to-line inductance of 22.1 mH and a resistance of 16.2 ohms; these values affect current rise time and copper losses in the G-coded winding set. A voltage constant of 0.44 VRMS/rad/sec links back EMF to speed, and the motor uses a size 21 frameless resolver for primary feedback so the controller can regulate velocity and commutation without Hall sensors. No holding brake is fitted, and the shaft is supplied without a seal, so static load retention and external protection must be provided by the machine.

Mechanical integration follows the NEMA 23 frame envelope with a two-stack lamination length for added torque density. The rotor has a mass moment of inertia of 0.064 kgm² ×10⁻³, which supports fast reversing without excessive servo gain. Overall motor weight is 1.9 kg, which helps when the motor is installed on lightweight stages while still matching NEMA frame bolt patterns. The motor does not use secondary feedback, which keeps the wiring arrangement simpler.