Product Description:

The PMB31D-10201-02 brushless unit is a servomotor produced by Pacific Scientific within the PMB Brushless Servomotors series. It supplies regulated torque and speed for automated positioning axes, pick-and-place tables, and similar industrial tasks that depend on electronically commutated motion rather than brushed contact. The motor is used where repeatable movement, reduced maintenance, and direct compatibility with modern servo drives are required in compact machinery.

Its power conductors emerge as flying leads with MS connectors, giving flexible routing while preserving quick-disconnect capability. The frame follows the NEMA size 34 outline, so mounting holes align with the common 3.4-inch square flange used on small machines. With a 240 V AC bus, the winding reaches a nominal stall current of 5.4 ARMS, which helps with drive sizing for continuous holding torque without overheating. Rotor position is detected by an internal Hall sensor, enabling six-step commutation in systems that do not use high-resolution encoders. The shaft has a round profile, which simplifies attachment of couplings, pulleys, or gears that rely on compression or adhesive methods.

Thermal protection is embedded through a PTC thermistor so the amplifier can trip if copper temperature rises beyond its limit. Magnetic output scales with the single-stack lamination, identified by a stack length multiple of 1, the shortest core that favors lower inertia for quicker acceleration. The device is categorized as a PMB series brushless servomotor, which confirms compatibility with drives that use sinusoidal or trapezoidal control libraries for that family.