Product Description:

The PMB31D-10100-02 is a brushless servomotor produced by Pacific Scientific within the PMB Brushless Servomotors series. This motor is intended for closed-loop motion axes that demand repeatable torque and position control in packaging, conveying, or pick-and-place stations. By combining permanent-magnet construction with electronic commutation, the unit converts drive current into precise rotary movement for industrial automation tasks. Its compact frame helps it fit retrofit panels and other installations where surrounding machine space is limited. That layout also suits indexing tables and transfer mechanisms that cycle often and must return to commanded positions with consistent accuracy.

The frame follows the NEMA Size 34 standard, so its 3.4-inch square face mates directly to common gearheads and mounting patterns. At stall, the winding can draw a nominal current of 5.4 ARMS when fed from a bus up to 240 VAC, supporting continuous torque output within the motor's thermal range. Power and feedback leave the housing on factory-installed flying leads, and the leads terminate in field-crimped AMP connectors for straightforward connection to compatible drives. Standard face dimensions can simplify mechanical integration in equipment that already uses this motor envelope. The leaded connection style also avoids the added bulk of a separate terminal housing.

The feedback device is a resolver, giving analog sine-cosine signals that remain stable in electrically noisy environments and in areas with elevated operating temperatures. A built-in PTC thermistor is integrated with the windings so the drive can reduce output or stop operation before insulation is overstressed during heavy duty cycles. The output shaft is a round shaft, easing coupling to pulleys or clamp collars when keyways are unnecessary. Because the feedback and thermal sensor are built into the motor, the drive receives both rotor position and winding condition data without external monitoring devices. The laminated core uses a stack length multiple of 1, which keeps rotor inertia low and shortens the overall motor package for axes that need quick acceleration and compact installation.