Product Description:

The S33ANNH-RNVE-00 is a 6-pole Neodymium magnet brushless servo motor manufactured by Pacific Scientific for the S Brushless Motors series. Intended for precision axis control, it is supplied in a high-voltage configuration that supports elevated DC bus levels and uses a 3-stack stator to increase torque density. The unit mounts to machinery through the NEMA frame standard and uses a Viton shaft seal at the output end. A Size 21 frameless resolver supplies primary position feedback, while no secondary feedback channel or holding brake is included. Winding type A coils exit the housing through Interconnectron connectors, which keeps motor leads organized and supports straightforward cable routing inside compact machines.

Torque production begins with a continuous stall capacity of 5.3 Nm, so the motor can hold a steady load at zero speed without overheating under proper operating conditions. For rapid indexing, it can reach a peak of 15.3 Nm for brief periods. Each ampere of phase current produces output according to a torque constant of 1.5 Nm/ARMS, which helps estimate current demand during axis sizing. Magnetic response is influenced by a line-to-line inductance of 17.0 mH, while copper loss and thermal rise are affected by a winding resistance of 5.2 Ohms. The resolver signal supports closed-loop speed and position control with compatible Pacific Scientific digital drives.

Dynamic behavior is also affected by a rotor inertia of 0.48 x10^-3 kg·m², which supports quick acceleration and deceleration on short-cycle axes. Installation on moving carriages is practical because the motor mass is only 6.5 kg, which helps limit the load placed on slides and transfer arms. The housing follows the NEMA 34 frame envelope, making it easier to fit into standardized machine layouts and existing mounting patterns. Back EMF rises according to a voltage constant of 0.94 VRMS/rad/sec, which helps match the motor to the available bus voltage and intended speed range. In repeated start-stop motion, the low inertia and resolver feedback support accurate repeatable positioning across short transfer strokes.