Product Description:

The S32GNNA-RNNE-00 is a brushless servo motor manufactured by Pacific Scientific within the S Brushless Motors series. As a 6-pole neodymium magnet brushless unit, it is used in industrial automation where precise, repeatable torque is required to move gantries, indexers, and small conveyors. The NEMA-frame construction fits standardized mounting patterns, allowing closed-loop rotary motion to be integrated without custom brackets.

This model delivers a continuous stall torque of 4.0 Nm, meaning it can hold that load indefinitely without overheating when the shaft is locked. With a torque constant of 1.3 Nm/ARMS, each ampere of phase current produces a predictable amount of shaft torque, which helps support stable current-loop control. The phase inductance is 18 mH, and this electrical characteristic filters current ripple and should be considered when sizing the drive’s PWM frequency. Line-to-line resistance is 6.2 Ohms, and it contributes to copper losses and thermal rise during continuous operation. Mechanically, the motor follows the NEMA 34 frame standard and uses a 2-stack length with G winding. Connectors provide quick termination, while the absence of a holding brake and shaft seal reduces axial length and inertia for high-response applications. A voltage constant of 0.82 VRMS/rad/s links speed to back EMF, and the unit mounts with the designated NEMA frame hardware.

The dynamic envelope is capped by a peak torque of 11.3 Nm for short acceleration bursts, supported by a rotor inertia of 0.34 × 10⁻³ kg·m² that allows rapid speed changes without excessive overshoot. Overall mass is 4.9 kg, which is light enough for moving-axis installation while still supporting heat dissipation. Primary position feedback is provided by a Size 21 frameless resolver, and no secondary feedback device is fitted, so the drive must accept resolver signals directly. Any required holding or environmental protection must be provided externally to suit the application.

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