S31HNNA-RNVM-00 Pacific Scientific
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The Pacific Scientific S31HNNA-RNVM-00 is a 6-pole Neodymium magnet brushless servo motor from the S Brushless Motors series, featuring NEMA 34 frame size and a 3.2 kg motor weight. It provides a continuous stall torque of 2.2 Nm and a peak torque of 6.2 Nm, with a Viton shaft seal and size 21 frameless resolver as its primary feedback device.
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Product Description:
The S31HNNA-RNVM-00 is a 6-pole Neodymium magnet brushless servo motor produced by Pacific Scientific for its S Brushless Motors series. Built on the NEMA Frame mounting standard, the unit fits directly into NEMA 34 mechanical interfaces used on many positioning tables and pick-and-place axes. A size 21 frameless resolver supplies primary feedback, while connections route through a motor-mounted MS connector to simplify cable management. The Viton shaft seal guards the output against lubricant migration, and the design omits a holding brake so the drive must manage static torque when power is removed during industrial automation duty cycles.
The electromagnetic section delivers a continuous stall torque of 2.2 Nm and can reach a peak of 6.2 Nm for short acceleration bursts. Torque production per ampere is characterized by a constant of 0.7 Nm/ARMS, helping system designers select a current-rated amplifier. The three-phase winding presents a line-to-line inductance of 10.3 mH, a figure that influences current ripple and high-frequency response, while the measured resistance of 4.1 Ohms defines copper losses at steady load. Together, these parameters set the motor’s thermal envelope and determine how quickly it can accept repeated commands without overheating.
Dynamic behavior is aided by a rotor inertia of 0.18 × 10⁻³ kg·m², supporting rapid velocity changes with minimal controller effort. The assembly weighs 3.2 kg, permitting platform designs that require low moving mass yet adequate torque density. A back-EMF constant of 0.44 VRMS/rad/sec matches the motor to mid-bus voltage drives, and the physically compact NEMA 34 frame size keeps envelope dimensions consistent with legacy stepper mounts. The single-stack lamination, labeled as 1 Stack, and the H-type winding complete the electrical profile while secondary feedback is intentionally omitted to reduce component count.
Frequently Asked Questions about S31HNNA-RNVM-00:
Q: What is the continuous stall torque for the S31HNNA-RNVM-00 motor?
A: The S31HNNA-RNVM-00 delivers a continuous stall torque of 2.2 Nm.
Q: What NEMA frame size does the S31HNNA-RNVM-00 motor use?
A: This model is built to NEMA 34 frame size standards for compatibility with corresponding mounts.
Q: What type of shaft seal does the S31HNNA-RNVM-00 feature?
A: The motor is equipped with a Viton shaft seal to offer enhanced sealing at the shaft interface.
Q: What primary feedback device is used in the S31HNNA-RNVM-00?
A: A size 21 frameless resolver serves as the primary feedback device on this model.
Q: What termination style is provided on the S31HNNA-RNVM-00 brushless servo motor?
A: The S31HNNA-RNVM-00 is terminated with a motor mounted MS Connector for electrical connection.
