PMB31D-00100-02 Pacific Scientific
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The Pacific Scientific PMB31D-00100-02 is a brushless servomotor from the PMB Brushless Servomotors series featuring a NEMA Size 34 frame and a shaft with a flat design. The motor comes equipped with a resolver sensor, flying leads with AMP connectors, and a PTC thermistor for customization. Its nominal stall current at 240Vac is 5.4 ARMS.
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Product Description:
The PMB31D-00100-02 is a brushless servomotor manufactured by Pacific Scientific as part of the PMB Brushless Servomotors series. The unit is intended to deliver tightly regulated torque and speed for automated packaging lines, material-handling axes, and other motion-control stations. By combining a permanent-magnet rotor with electronic commutation, the motor produces smooth continuous rotation while allowing the drive to reverse or index on command during positioning cycles. The motor can be paired with servo drives that regulate current and velocity in closed-loop motion systems. Because commutation is electronic rather than brush-based, there are no brushes to wear during normal operation.
With a frame classified as NEMA size 34, the motor shares the 3.4-inch square mounting footprint common to many stepper and servo packages. This footprint helps the unit fit machines already arranged for standard NEMA mounting patterns. Under locked-rotor conditions it can draw up to 5.4 ARMS from a supply that does not exceed 240 Vac, so the connected amplifier and cabling must be able to carry that load without overheating. Rotor position is reported by a resolver, providing noise-immune analog sine-cosine feedback for the drive in electrically demanding environments. For mechanical connection, the output shaft incorporates a flat shaft feature, giving set-screw couplings a positive surface and helping prevent slip during high-torque reversals.
Field wiring arrives as flying leads with AMP connectors, which removes the need for a proprietary plug at the motor body and can simplify cabinet routing. A built-in PTC thermistor raises its resistance sharply as winding temperature climbs, allowing the drive to reduce current before insulation limits are reached. This temperature-sensing method helps protect the motor during repeated starts, stops, and load changes. The magnetic stack uses a single-stack layout with a stack length multiple of 1, which shortens the body and lowers rotor inertia for quicker response. The shorter housing also helps the motor fit into compact machine spaces where axial clearance is limited.
Frequently Asked Questions about PMB31D-00100-02:
Q: What kind of connector does the PMB31D-00100-02 servomotor use?
A: The PMB31D-00100-02 uses flying leads with AMP connectors for simplified electrical connections.
Q: What type of customization is included with the PMB31D-00100-02 servomotor?
A: A PTC thermistor is incorporated in this model for thermal protection.
Q: What is the frame size of the PMB31D-00100-02 servomotor?
A: This servomotor is built in the NEMA Size 34 frame for compatibility with standard mounting requirements.
Q: What is the nominal stall current of the PMB31D-00100-02 at 240Vac?
A: The nominal stall current at 240Vac max for this motor is 5.4 ARMS.
Q: What type of shaft design does the PMB31D-00100-02 servomotor have?
A: The PMB31D-00100-02 features a flat shaft design for effective torque transmission.
