Product Description:

The S32HNNA-RNVM-02 is a brushless servo motor manufactured by Pacific Scientific for the S Brushless Motors series. Built around six neodymium magnet poles and a NEMA-pattern housing, it converts electrical input from a matched drive into controlled rotary motion for positioning tables, feeders, and other industrial axes that require repeatable speed and torque. This design suits applications that need accurate motion control in a compact motor format.

During steady-state operation, the motor supplies up to 4.0 Nm of continuous stall torque, allowing it to hold load without rotor movement while remaining within its thermal limit. For transient starts or stops, it reaches 11.3 Nm, providing additional torque for overcoming friction and reflected inertia. The torque constant is 0.7 Nm/ARMS, so about 1 A RMS of phase current produces 0.7 Nm. Current rise in the windings is influenced by a line-to-line inductance of 4.5 mH, which the servo amplifier must account for when setting current loop response. The phase resistance is 1.6 Ohms, which affects drive sizing during continuous duty. The motor uses Class H windings, comes without a holding brake, and includes a Viton shaft seal to limit lubricant escape and particulate ingress.

The frame weighs 4.9 kg, providing useful thermal mass while remaining light enough for gantry or jointed-arm applications. A NEMA 34 mounting face supports compatibility with widely used adapters and gearheads. Rotor dynamics are supported by a moment of inertia of 0.34 × 10⁻³ kg·m², which helps the motor accelerate quickly with moderate drive power. Generated back EMF follows a constant of 0.44 VRMS/rad/sec, giving the controller a predictable voltage reference for commutation. Primary feedback is delivered by an integral size 21 frameless resolver, and no secondary transducer is fitted. The two-stack magnetic length increases torque density, and power and signal conductors exit through a motor-mounted MS connector.