PMB31B-20100-03
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The PMB31B-20100-03 servomotor features a wide-type block style, bottom mount configuration, a guide rail width of 31 mm, and a dynamic load rating of 31.0 kN. Part of the PMB Brushless Servomotors series by Pacific Scientific, it is constructed from high carbon steel and includes end sealing options for durability.
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Product Description:
The Pacific Scientific's PMB31B-20100-03 Brushless Servo Motor is designed to generate accurate torque and reliable mechanical performance. This motor’s winding temperature rises gradually due to its 28-minute thermal time constant, facilitating extended operation duty with steady thermal rise.
The square key shaft type of this motor ensures a reliable mechanical connection that inhibits slippage, enabling efficient torque transfer to attached components. With a viscous damping coefficient of 0.0124 Nm/kRPM, it actively restrains oscillations and thus ensures smooth rotation under changing speeds. The 2.11 Nm continuous stall torque of this servo motor provides the ability to handle mechanical loads without torque loss over time. This PMB31B-20100-03 Brushless Servo Motor's torque constant (RMS) of 0.79 Nm/Arms guarantees precise proportional torque output from the supplied current. A nominal stall current of 2.7 Arms allows this motor to produce high torque at maximum load levels without instability. This motor is also capable of maintaining a stall current of 2.66 Arms continuously, enabling continuous load handling over long periods. The 7.6 Ohms line-to-line resistance of the PMB31B-20100-03 motor controls current consumption, and thus balances the electrical efficiency and thermal control.
The rotor dynamics of this brushless motor are optimized with an inertia rating of 0.137 x 10⁻³ kgm². The typical rated speed of 2900 rpm allows this motor to execute rapid rotational output while maintaining positional accuracy. Its NEMA size 34 frame provides compatibility with a broad range of industrial mounting configurations, making it easy to integrate into existing assemblies. For precision feedback, the PMB31B-20100-03 motor features a resolver sensor, which offers real-time position and velocity information, critical for high-precision servo control. The electrical connectivity of this motor is done by flying leads with AMP connectors to provide stable power and signal transfer despite operational vibration.
Frequently Asked Questions about PMB31B-20100-03:
Q: How does the resolver sensor in PMB31B-20100-03 improve motion control?
A: The resolver provides continuous position feedback for precise closed-loop control. This ensures accurate speed regulation and stable operation under varying loads.
Q: Why is a square key shaft used in the PMB31B-20100-03?
A: The square key shaft prevents slippage between the motor and driven components. This design enhances torque transmission reliability during high-load conditions.
Q: What is the advantage of the 0.0124 Nm/kRPM viscous damping coefficient?
A: It helps reduce vibration and oscillations during operation. This improves smoothness and stability in high-speed motion tasks.
Q: How does the NEMA size 34 frame benefit installation?
A: NEMA 34 compatibility allows easy integration with standardized industrial mounts. This reduces customization requirements for mechanical setup.
Q: Why is the 0.137 x 10⁻³ kgm² rotor inertia important in PMB31B-20100-03?
A: Low inertia allows rapid acceleration and deceleration without overshooting. It also maintains stability during precise positioning.
