Product Description:

The PMB31D-10214-01 brushless servomotor is manufactured by Pacific Scientific as part of the PMB Brushless Servomotors series. It is a permanent-magnet, three-phase actuator designed for precise velocity and position control in industrial automation cells where rapid response and repeatable motion profiles are required. Its compact servo design supports accurate motion on axes that need repeatable starts, stops, and speed changes during automated operation.

This motor is built on a NEMA Size 34 frame, allowing direct installation in machinery that already follows the NEMA 34 bolt pattern. During locked-rotor conditions at the rated 240 VAC bus, a nominal stall current of 5.4 ARMS flows, so the drive must be sized to supply that continuous phase current without entering current limit. Rotor position feedback comes from a quadrature encoder that generates 2048 ppr for each mechanical revolution, giving the controller 8192 discrete edges for commutation, velocity regulation, and position control. Power, feedback, and signal wiring exit through flying leads with MS connectors, which simplifies cable routing and provides a consistent connection method at the motor end.

The control loop receives rotor angle from a digital encoder with commutation, eliminating the need for separate Hall sensors and reducing wiring complexity. To guard against lubricant migration and fine particulate ingress, the motor is equipped with a shaft seal, which helps protect internal components in dusty or lightly sprayed environments. Output torque is delivered through a round shaft, making it suitable for clamp hubs, timing pulleys, or custom couplings that do not rely on keyways. Magnetic length uses stack length multiple 1, the shortest lamination pack in the PMB family, which lowers inertia for faster acceleration. The unit is produced by Pacific Scientific for use with SC900 and SCE900 drive platforms, where matching electrical constants support stable servo operation.