Product Description:

The PMB31B-10100-00 is a brushless servomotor manufactured by Pacific Scientific within the PMB Brushless Servomotors series. Designed for closed-loop motion tasks, the unit converts commanded current from a matched drive into controlled torque and speed, letting automated machinery position loads, follow velocity profiles, or maintain tension without mechanical slip. Its brushless architecture reduces maintenance and makes it suitable for multi-axis pick-and-place gantries, small conveyors, and packaging stations that need consistent rotary performance. This also supports repeatable acceleration and deceleration during frequent duty cycles.

The motor uses the NEMA Size 34 mounting pattern, aligning with widely used frames and supporting standardized machine layouts. At 240 Vac, the winding draws 2.7 ARMS under holding conditions, so the matching drive must supply that current without overheating. Rotor position returns through a resolver, giving analog sine-cosine feedback that stays accurate in noisy environments and at high temperatures. This feedback method supports stable commutation and speed regulation where electrical noise or heat could disturb simpler sensing methods. Power and feedback conductors exit the housing as flying leads with AMP connectors, which simplifies wiring because no receptacle is built into the motor housing. A round shaft eliminates keyways, supports clamp-style couplings, and helps reduce stress concentrations during rapid reversals.

A stack length multiple of 1 indicates the shortest magnetic stack in this frame, trading maximum torque for a compact overall length when space is limited. The build is a standard motor with no special windings or seals. That configuration keeps the design straightforward for installations that do not need custom sealing or special electrical characteristics. Classified as a PMB Series Brushless Servomotor, it requires a compatible sinusoidal drive and operates within the thermal limits for this frame.