Product Description:

The PMB31D-00201-02 is a brushless servomotor manufactured by Pacific Scientific as part of the PMB Brushless Servomotors series. Classified for servo duty, the motor converts commanded phase current into controlled rotary motion for positioning or velocity loops in industrial automation equipment. Its electrical and feedback features allow it to operate with matched drives that regulate torque on conveyors, presses, or machine axes.

Mechanical dimensions align with a NEMA Size 34 frame, giving the motor a standard mounting interface for equipment with similar bolt patterns. Its nominal stall current at 240 VAC is 5.4 ARMS, indicating the continuous phase current the drive must supply during worst-case load conditions without exceeding thermal limits. Power and feedback exit the housing as flying leads with MS connectors, allowing quick disconnection while keeping cable routing straightforward. Commutation data is supplied by an integrated Hall sensor, enabling trapezoidal or vector drives to synchronize current with rotor position. To protect the windings, thermal monitoring relies on a PTC thermistor that increases resistance rapidly when the stator reaches an elevated temperature. This arrangement supports stable motor operation where controlled torque and responsive speed changes are required.

The output uses a flat shaft end, which provides an anti-rotation surface for couplings that rely on set screws rather than keys. Magnetic material is arranged in a single lamination stack, expressed by a stack length multiple of 1, which helps keep inertia low for responsive acceleration and deceleration. As part of the PMB Series Brushless Servomotor family, the unit shares common mounting and electrical characteristics with related models in the line. That consistency helps matched drives interpret feedback and commutation signals in a predictable way during servo operation.