Product Description:

The PMB31D-10201-00 is a brushless servomotor built by Pacific Scientific for the PMB Brushless Servomotors line. It serves as the electromechanical link between a digital drive amplifier and a mechanical load, delivering commanded torque and speed for motion axes in pick-and-place units, automated assembly stations, and material-handling equipment. Because the motor does not use brushes, wear is reduced and routine service is largely limited to the bearings and connected drive components.

With a frame size of NEMA Size 34, the motor bolts to mounting patterns commonly used on conveyor heads and medium-capacity gearboxes while providing a larger rotor volume than smaller NEMA 23 bodies. The winding can accept a continuous stall phase current of 5.4 ARMS when operated from 240 VAC, so the matched drive must be able to supply that level of current to hold rated torque at zero speed. Field wiring is provided through flying leads with MS connectors, which simplifies connection in tight cabinets because no separate terminal block is required. Rotor position is reported by a three-phase Hall sensor, allowing six-step electronic commutation in drives that do not use a high-resolution encoder. The motor uses a round shaft, which supports straightforward coupling selection and avoids the stress concentrations associated with keyed or splined designs.

The unit is offered as a standard motor, so its mechanical interfaces, thermal limits, and magnetic design follow the regular production configuration for this family. Its magnetic core uses a 1 stack length, the shortest lamination set in the line, which helps reduce inertia and supports quick start-stop cycles on light indexing loads. This compact core length can benefit applications that favor fast response over maximum torque density. Compatible amplifiers and Hall-based commutation data are available for this motor type, supporting standard industrial motion control.