Product Description:

The S22GNAA-RNNM-00 is a 6-pole neodymium-magnet brushless servo motor produced by Pacific Scientific within the S Brushless Motors series. Designed for closed-loop motion tasks, it converts command currents into precise shaft rotation for pick-and-place gantries, indexing tables, or web-tension drives. Position feedback comes from a size 21 frameless resolver that attaches directly to the rotor and supplies the controller with sine-cosine position signals.

For continuous operation, the motor delivers 1.0 Nm of stall torque, meaning it can hold that load indefinitely without exceeding thermal limits at rated cooling. Start-up or rapid acceleration demands are covered by its peak capability of 2.64 Nm, which is available for short bursts to overcome inertia or friction. The torque constant is 0.7 Nm/ARMS, so each ampere of sinusoidal phase current produces this amount of torque. Electrical behavior is shaped by a phase-to-phase inductance of 22.1 mH and a resistance of 16.2 ohms, values that influence current ripple, winding losses, and drive response. A voltage constant of 0.44 VRMS/rad/sec links back EMF to speed, and winding type G is used in this motor.

The mechanical envelope follows the NEMA mounting standard, and the housing corresponds to NEMA 23 with a two-stack lamination length that increases magnetic flux without enlarging the frame. Overall mass is 1.9 kg, which helps keep moving load low for direct-drive axes, while rotor inertia is only 0.064 kgm² × 10^-3, allowing high servo gains. Connection to the drive occurs through a motor-mounted MS connector, and the assembly does not include a shaft seal, so the application must limit contaminant exposure. A 24V dc brake is integrated to hold the shaft when power is removed, and there is no secondary feedback channel, which simplifies cabling while relying solely on the resolver for position data.