PMB31B-20200-03
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The PMB31B-20200-03 servomotor features an operating pressure range of 0 to 1.0 MPa, a compact weight of approximately 150g, and a durable aluminum body. Part of the PMB Brushless Servomotors series by Pacific Scientific, it is equipped with IP65 enclosure protection and operates on 24V DC for reliable performance.
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Product Description:
The PMB31B-20200-03 Servo motor has a B type winding design, functions safely up to 240 volts. This Pacific Scientific motor delivers continuous torque of 1.90 Nm and its 8 pole synchronous structure ensures smooth and precise performance with dependable efficiency for demanding motion applications.
The PMB31B-20200-03 brushless servomotor mass of two and a half kilograms makes it fairly compact and manageable. Its IP40 rating makes it safer from the ingress of objects larger than one milli meters but it does not offer sealing against water. This module features flexible wire rather than a built in plug and attaches through MS type connectors. It has a moderate current demand of 2.7 amperes RMS in stall conditions which affects how it interacts with its drive components. It has a winding resistance of 7.6 ohms which helps determine heat generation and electrical efficiency. It can produce maximum torque of 6.26 Nm for short bursts which allows it to handle sudden acceleration. Its motor casing physical dimensions follow the NEMA standard and it has a fairly large size of 34. It has a resolver that detects angular position and its shaft rotates with 2900 rpm under rated voltage of 240 volts AC or 320 volts DC.
This PMB31B-20200-03 brushless servomotor has a resistance of just over one degree Celsius per watt and it has a strong magnetic field and significant torque potential due to its high current value of eight amperes. Its shaft includes a slot and key that locks into a mating hub and its shaft seal helps keep contaminants away from internal bearings. It uses powerful permanent magnets which create stronger magnetic flux density which boost performance and allows for high torque output.
Frequently Asked Questions about PMB31B-20200-03:
Q: How does the PMB31B-20200-03 manage heat during continuous operation?
A: Its thermal resistance allows predictable temperature rise per watt of loss. Proper ventilation or forced cooling ensures safe continuous duty in demanding cycles.
Q: What impact does using a resolver have compared to an encoder?
A: Resolvers provide rugged feedback immune to electrical noise. They are preferred in harsh industrial settings where reliability outweighs ultra-fine resolution.
Q: How does the IP40 protection rating affect installation?
A: It limits the motor’s use to clean, dry environments. Enclosures or protective housings are needed for dusty or wet locations.
Q: What are the consequences of exceeding the 240 V input rating?
A: Overvoltage stresses the insulation and windings, leading to breakdown or failure. Using matched drives ensures safe electrical operation.
Q: How does the PMB31B-20200-03 handle sudden load changes?
A: Its peak torque capacity supports short bursts of acceleration. This prevents stalling and allows smoother transitions under dynamic conditions.
