PMB31D-10216-00 Pacific Scientific
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The Pacific Scientific PMB31D-10216-00 is a standard brushless servomotor in the PMB Brushless Servomotors series, featuring a NEMA Size 34 frame and a round shaft design. It comes equipped with a digital encoder with commutation, offering an encoder resolution of 4096 pulses per revolution and uses flying leads with MS connectors. The motor has a nominal stall current of 5.4 ARMS at 240 VAC.
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Product Description:
The PMB31D-10216-00 is a brushless servomotor designed by Pacific Scientific and belongs to the PMB Brushless Servomotors series. Within an automated cell, the unit converts controlled current from a servo amplifier into precise rotary motion for positioning axes, conveyors, or indexing tables where repeatable accuracy and rapid response are required. Because commutation is handled electronically, the motor supports closed-loop control with stable speed regulation and repeatable starts and stops under changing load conditions. This operating profile suits automation equipment that depends on accurate motion without the maintenance associated with brush wear.
This motor integrates a 4096 ppr incremental encoder whose fine resolution supports tight loop gains in position-servo applications. Its frame follows the dimensional envelope of NEMA Size 34, so it fits machine layouts and gearheads built for that motor size. Drive electronics must supply up to 5.4 ARMS of stall current at 240 VAC, a value that guides current capacity in the matching power stage. Rotor orientation data and three digital commutation tracks come from the integrated digital encoder with commutation, eliminating the need for separate Hall sensors. Power, feedback, and ground conductors exit as flying leads with MS connectors, so the motor can be wired through preterminated connections without opening the housing.
The mechanical interface features a round shaft, allowing the use of clamp-style or adhesive couplings when low backlash is required. Classified as a standard motor, the unit uses a standard configuration within this product line. Its single lamination stack is identified by stack length multiple 1, which helps keep rotor inertia low for high-acceleration moves at modest continuous torque. All performance characteristics follow the baseline of the PMB Brushless Servomotors series, so electromagnetic geometry and thermal behavior remain consistent within the product line.
Frequently Asked Questions about PMB31D-10216-00:
Q: What encoder resolution does PMB31D-10216-00 use?
A: This servo motor uses a 4096 ppr encoder which delivers fine position increments for closed-loop control.
Q: How does the number of poles influence PMB31D-10216-00 performance?
A: An eight pole design affects electrical frequency and torque production by increasing torque per electrical cycle and reducing torque ripple.
Q: How does the listed weight for PMB31D-10216-00 influence system integration?
A: The 2.9 kg mass for this drive provides a datum for mechanical support and inertia matching calculations.
Q: What does the thermal time constant specification indicate for PMB31D-10216-00?
A: The thermal time constant of 26 minutes indicates the time scale for the motor winding and rotor to approach thermal equilibrium after a step change in power.
Q: What role does the sensor type play in PMB31D-10216-00 operation?
A: The digital encoder with commutation provides both position feedback and commutation signals which enable accurate rotor position sensing and proper electronic commutation.
