PMB31D-20200-03
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The Pacific Scientific PMB31D-20200-03 motor is part of the PMB Brushless Servomotors series, featuring a DC brushless design. It provides an output power of 30 Watts with a torque of 0.143 Nm and operates at a rotational speed of 2000 rpm. The motor is lightweight at 0.8 kg and has an IP40 protection class.
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Product Description:
The PMB31D-20200-03 servo motor from Pacific Scientific is designed as a compact, high-performance motor for industrial automation. It features a NEMA-34 housing size for standard mounting compatibility and it includes a single stack construction for reduced length. This motor has total body length of 13.41 cm and it is equipped with a 1.270 cm thick and 2.540 cm long shaft with a square key design.
The PMB31D-20200-03 motor uses high-density Neodymium magnets for consistent torque generation to deliver a continuous stall torque of 2.11 Nm and a maximum torque output that reaches up to 6.26 Nm. It supports a maximum operating speed of 6000 rev/min that is optimized for dynamic applications and its winding supports up to 5.1 A of continuous along with a peak current rating that reaches 15.3 A during acceleration. The unit’s torque constant is rated as 0.41 Nm/A to support smooth torque generation under varying load conditions and its voltage constant is 0.25 V/rad/sec. Its electrical resistance between lines is 2 ohms and line-to-line inductance is rated as 5.2 mH. This PMB31D motor has a calculated inertia of 0.137 ×10⁻³ kg·m² to achieve faster acceleration and deceleration. It comes with a resolver system to track motor feedback and it uses MS connectors provided on flying leads of 18” length for making electrical integration fast and secure.
The PMB31D-20200-03 motor includes a shaft seal for better environmental resistance and its inbuilt PTC sensor provides thermal protection. Its insulation system is classified under class F to support operation on high-temperature sites, while its construction is IP40 rated for indoor industrial use. The motor’s weight is approx. 2.5 kg and its exposed-lam design supports better thermal dissipation that helps maintain torque under continuous duty cycles.
Frequently Asked Questions about PMB31D-20200-03:
Q: How does the resolver system in the PMB31D-20200-03 improve motor performance?
A: The resolver ensures accurate rotor position feedback, which enhances precision in motion control. This allows the motor to maintain synchronization with demanding automation systems.
Q: Why is a PTC sensor included in the PMB31D-20200-03 motor?
A: The PTC sensor monitors temperature rise within windings and prevents overheating. This increases motor reliability in continuous-duty operations.
Q: How does the shaft seal of the PMB31D-20200-03 contribute to durability?
A: The shaft seal protects against dust and particle ingress in industrial environments. This helps extend the lifespan of bearings and rotor assembly.
Q: What advantage does a single-stack construction provide in this motor?
A: The single-stack design reduces body length for compact installations. This is particularly useful where space constraints are critical.
Q: How do MS connectors with flying leads improve integration?
A: These connectors simplify wiring and reduce setup time during installation. They also ensure secure electrical connections in vibration-prone environments.
