Product Description:

The S22HNAA-RNNM-00 is a 6-pole neodymium magnet brushless servo motor manufactured by Pacific Scientific as part of the S Brushless Motors series. Designed for closed-loop motion stages, conveyors, and pick-and-place axes, the S22HNAA-RNNM-00 converts commanded current into regulated shaft torque for precise industrial automation tasks. It uses a NEMA frame mounting pattern so it fits standardized machinery envelopes, and its Size 21 frameless resolver supplies primary position feedback to the drive. This feedback arrangement supports commutation and closed-loop control during repeated starts, stops, and speed changes.

At standstill, the motor can deliver a continuous torque of 1.0 Nm, while transient demands are met with a peak capability of 2.64 Nm. Torque is proportional to current at a rate of 0.3 Nm/ARMS, so the drive can estimate load demand directly from phase current. Electrical response is shaped by a line-to-line inductance of 5.7 mH and a resistance of 4.2 Ohms, which affect the electrical time constant and copper loss during servo regulation. A back-EMF slope of 0.19 VRMS/rad/sec matches the six-pole stator and H winding, helping the motor operate with 120 VAC bus drives while maintaining predictable voltage behavior as speed rises.

Rotor inertia is only 0.064 × 10⁻³ kg·m², which helps the motor respond quickly to speed and position commands without unnecessary peak current. The motor has a mass of 1.9 kg, and it uses a compact NEMA 23 frame based on the two-stack lamination length. For static positioning or controlled shutdown, a 24 V DC brake can lock the shaft, and the lack of a shaft seal reduces drag in clean operating environments. Motor power and resolver leads exit through a motor-mounted MS connector, and the design omits secondary feedback devices so cable routing remains straightforward.