PMB31D-00216-02
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The PMB31D-00216-02 brushless servomotor features a continuous stall torque of 2.11 Nm, an encoder resolution of 4096 ppr, a NEMA Size 34 frame, and a rated speed of up to 6,000 RPM. Part of the PMB Brushless Servomotors series by Pacific Scientific, it includes flying leads with MS connectors.
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Product Description:
The PMB31D-00216-02 Brushless Servomotor is manufactured by Pacific Scientific as part of the Brushless Servomotor series. The motor is engineered for dependable service in automated equipment. It supports efficient motion regulation and precise positioning in industrial applications. Consistent operation is maintained under extended duty cycles.
The Pacific Scientific PMB31D-00216-02 Brushless Servomotor is an 8-pole synchronous servomotor. Additional poles increase torque per revolution, which enhances the drive’s suitability for low-speed, high-torque requirements. The motor is produced in design version 1. The device incorporates neodymium-iron-boron magnets. High magnetic energy density from this material provides compact size while sustaining strong mechanical output. Continuous stall torque is rated at 2.11 Nm. This torque capacity ensures reliable operation when the load demands constant force without interruption. The motor develops a peak torque of 6.26 Nm. That margin allows short bursts of acceleration and effective handling of dynamic load changes. The rotor inertia is 0.137 kgm²×10⁻³, enabling rapid response to command changes and stable regulation during speed transitions. The static friction torque does not exceed 0.09 Nm. Such a low threshold improves start-up accuracy and minimizes energy losses in stationary conditions. The viscous damping coefficient has a value of 0.0124 Nm/kRPM. This parameter contributes to reducing oscillations and ensures smoother performance during high-speed operation.
The Pacific Scientific PMB31D-00216-02 Brushless Servomotor has a thermal resistance of 1.08 °C/Watt. That resistance value provides efficient transfer of heat to the surrounding environment, reducing the likelihood of overheating. The thermal time constant is 28 minutes. Such duration indicates the motor’s ability to maintain operational stability under long-term load before reaching its maximum allowable temperature. The motor weight is 2.5 kg. This relatively low mass simplifies installation and integration into compact machine designs. The mechanical structure supports applications where space and weight constraints are critical. System engineers can incorporate the Pacific Scientific PMB31D-00216-02 Brushless Servomotor into precision-driven equipment requiring controlled torque and reliable performance over extended operation.
Frequently Asked Questions about PMB31D-00216-02:
Q: How does the PMB31D-00216-02 servomotor maintain accuracy at startup?
A: Its static friction torque of 0.09 Nm ensures smooth engagement, reducing slip and enhancing precision when initiating movement.
Q: What benefit does the 8-pole design of the PMB31D-00216-02 provide?
A: It delivers greater torque per revolution, enabling efficient low-speed performance and stable handling of high-load applications.
Q: How does the motor manage heat transfer during prolonged operation?
A: The 1.08 °C/Watt thermal resistance allows efficient dissipation, preventing overheating and supporting continuous duty cycles in industrial equipment.
Q: What would happen if the PMB31D-00216-02 experiences magnet degradation over time?
A: A decline in neodymium magnet strength could reduce torque output. Repair generally requires magnet replacement by certified service centers to restore performance.
Q: Why is the low viscous damping coefficient of 0.0124 Nm/kRPM important in high-speed applications?
A: The value of 0.0124 Nm/kRPM reduces oscillations during fast transitions, ensuring smoother motion regulation and reliable stability in precision-driven automation systems.
