PMB31B-20116-01
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The Pacific Scientific PMB31B-20116-01 motor, part of the PMB Brushless Servomotors series, features a NEMA Size 34 frame and a rated speed of 2,700 RPM. This motor delivers a continuous torque of 1.9 Nm and operates at a bus voltage of 320 VDC. It is equipped with a digital encoder offering 4096 ppr resolution and resolver feedback for precision.
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Product Description:
The PMB31B-20116-01 is built by Pacific Scientific as a brushless servomotor along with a rated speed of 2900 rev/min at 240V AC input. It features a digital encoder with -1¡ of mechanical commutation accuracy for precise positional feedback and offers a resolution of 4096 PPR. This encoder operates at 8000 rev/min of maximum speed and functions on a 5 VDC supply, while utilizes 100 mA of current.
The PMB31B-20116-01 motor can reach a maximum operational speed of 6000 rev/min and provides a peak turn effect of 6.26 Nm. Its angular moment of inertia is rated at 0.000137 kg·m² and its typical rated torque is 2.11 Nm. Neodymium-iron-boron magnets are used in its structure to achieve high torque density and it is equipped with double-shielded bearings that enhances durability and reduce contamination. Its peak load current reaches 8.0 A for short bursts and its inductance is rated at 19.6 mH, along with a resistance of 7.6 Ohms. The PMB31B motor possess a viscous damping coefficient of 0.0124 Nm/Krpm and a thermal resistance of value 1.08 °C/W. It follows NEMA standard mounting dimensions and come with a thermal time constant of 28 minutes to support stable temperature management. This unit offers a maximum static friction of 0.09 Nm and it is constructed with an IP40 protection rating to ensure basic protection from external intrudes.
The PMB31B-20116-01 motor is presented in a length of 134.1 mm and weight 2.5 kg. It has 31.75 mm long shaft with an imposed sealing ring for maximum protection and possess a square key design for mechanical balance. Eight magnetic pole pairs are used for stable performance and it comes with AMP connector on the provided 18” lead for electrical connections. The PMB31B motor’s attached encoder uses AM26LS31 line driver.
Frequently Asked Questions about PMB31B-20116-01:
Q: How does the 4096 PPR encoder enhance the performance of the PMB31B-20116-01?
A: The 4096 PPR encoder provides highly accurate feedback, ensuring precise control of position and velocity. This helps achieve smooth motion with minimal error in applications requiring precision.
Q: What is the significance of the PMB31B-20116-01's thermal time constant of 28 minutes?
A: The 28-minute thermal time constant ensures stable temperature regulation during continuous operation. This is important for avoiding overheating and prolonging the motor's lifespan.
Q: Why does the PMB31B-20116-01 use neodymium-iron-boron magnets?
A: Neodymium-iron-boron magnets provide superior magnetic strength, enabling higher torque density in a compact design. This results in enhanced motor efficiency and overall performance.
Q: Why is the viscous damping coefficient of 0.0124 Nm/kRPM important for the PMB31B motor?
A: The viscous damping helps minimize vibrations and oscillations during operation. This results in smoother performance and reduced mechanical stress on components.
Q: What is the function of the 8 magnetic pole pairs in the PMB31B motor?
A: The 8 magnetic pole pairs help achieve a balanced and stable motor performance by reducing torque ripple. This is essential for maintaining smooth and efficient operation, especially in high-speed applications.
