S22GNNA-RNNS-02 Pacific Scientific
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The Pacific Scientific S22GNNA-RNNS-02 is a 6-pole Neodymium magnet brushless servo motor from the S Brushless Motors series. It features a NEMA 23 frame with a 1.0 Nm continuous stall torque and 2.64 Nm peak torque. The motor weighs 1.9 kg and uses a size 21 frameless resolver as its primary feedback device.
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Product Description:
The S22GNNA-RNNS-02 is a 6-pole Neodymium magnet brushless servo motor produced by Pacific Scientific within the S Brushless Motors series. In industrial automation, it provides controlled torque and speed for point-to-point or continuous-motion systems, using resolver feedback to keep the drive synchronized with load conditions. The motor has no brake and no shaft seal, so power-off holding and environmental sealing must be handled externally.
The motor delivers 1.0 Nm of continuous stall torque, meaning it can hold that torque indefinitely without overheating. Its peak torque capability reaches 2.64 Nm for short accelerations. Copper characteristics show a line-to-line resistance of 16.2 Ohms, while the winding inductance is 22.1 mH. These values affect current rise time and servo drive selection. The housing follows the NEMA 23 frame size under the NEMA frame mounting standard, allowing direct installation in equipment built to that flange pattern. The motor has a stack length of 2, and winding code G indicates the wire gauge and turn count used for the published electrical constants. Primary position feedback comes from a size 21 frameless resolver, and no secondary feedback device is included.
The motor weighs 1.9 kg, which helps keep moving mass low in pick-and-place axes. Rotor inertia is 0.064×10⁻³ kg·m², giving a practical balance between acceleration capability and load stability. A torque constant of 0.7 Nm/ARMS indicates the torque produced for each ampere supplied, and a back-EMF coefficient of 0.44 VRMS/rad/sec indicates the generated voltage at speed. Six Neodymium rotor poles allow the controller to reach target speeds with lower electrical frequency, which can reduce switching losses. Resolver feedback provides absolute position over 360 degrees and supports tight servo loops with minimal phase lag.
Frequently Asked Questions about S22GNNA-RNNS-02:
Q: What is the continuous stall torque of the S22GNNA-RNNS-02 motor?
A: This model delivers a continuous stall torque of 1.0 Nm, providing consistent output for servo applications.
Q: Does the S22GNNA-RNNS-02 motor have a holding brake?
A: The S22GNNA-RNNS-02 motor does not include a holding brake.
Q: What NEMA frame size does the S22GNNA-RNNS-02 use?
A: This motor is built to the NEMA 23 frame size standard.
Q: What type of primary feedback device is used in the S22GNNA-RNNS-02?
A: The primary feedback device for this model is a Size 21 frameless resolver.
Q: What is the peak torque output of the S22GNNA-RNNS-02 motor?
A: The peak torque provided by the S22GNNA-RNNS-02 motor is 2.64 Nm.
