8MSA3L.R0-B5
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The 8MSA3L.R0-B5 motor coupling features a 42 mm outside diameter, a length through bore of 66 mm, a rated torque of 40 Nm, and accommodates axial misalignment of ±1 mm. Part of the 8MS Three Phase Synchronous Motors series by B & R Automation, it is made from anodized aluminum alloy and operates in temperatures as low as -30°C.
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Product Description:
B&R 8MSA3L.R0-B5 Motor handles peak currents up to 3.9 A and maintains stability with a 25-minute thermal time constant which ensures responsive performance and thermal resilience.
The 8MSA3L.R0-B5 motor dissipates its own heat naturally without relying on an external cooling device or forced airflow and its stator winding has an electrical resistance of 37.6 ohm per phase which indicates finer wire windings or compact coil arrangements. The torque it can consistently apply to a load without overheating or reducing performance over time is 0.55 nm and it is suitable for moderate duty industrial applications with its power rating of 0.35 kW. It has a higher stator inductance of 45 mH which smooths out current transitions and when it operates under normal, sustained conditions the current flows through it is 0.83 ampere. It produces torque of 0.65 nm when its shaft is held stationary under maximum effort without rotation and its standard rotational velocity is 6000 min⁻¹ which positioned it in a high speed performance category. The electric current drawn is 0.91 A when the shaft is locked and trying to turn and it has a voltage constant of 43 V/1000 min⁻¹ which is a key figure that connects rotational velocity with the generated back electromotive force.
The rotational inertia of this 8MS series module is relatively slow equivalent to 0.39 kg·cm² and it uses a resolver which is a rugged and analog position-sensing technology that offers high reliability under tough environmental conditions and is well-suited for demanding and high vibration settings. It has a modest weight of 1.75 kilograms paired which supports a good power to weight ratio that makes it beneficial for applications with mobile or suspended assemblies.
Frequently Asked Questions about 8MSA3L.R0-B5:
Q: How does the high torque constant improve the performance of the 8MSA3L.R0-B5 motor?
A: A torque constant of 0.71 Nm/A allows the motor to generate more torque per amp. This increases efficiency and minimizes energy loss under dynamic loads.
Q: Why is the resolver used in the 8MSA3L.R0-B5 instead of an optical encoder?
A: A resolver offers greater durability and resistance to shock and vibration. It's ideal for harsh environments where optical systems may fail or degrade.
Q: What is the advantage of a higher inductance value like 45 mH in this motor?
A: It smooths the motor’s electrical response, reducing noise and enhancing control stability. This is useful in applications demanding fine motion precision.
Q: How does the moment of inertia of 0.39 kg·cm² affect motor response?
A: The relatively low inertia allows for rapid speed changes and fine-tuned acceleration. It's perfect for high-speed pick-and-place or robotics.
Q: Why does the B&R 8MSA3L.R0-B5 motor support such a high peak current of 3.9 A?
A: It enables the motor to handle fast acceleration or heavy-load startups. This makes it suitable for machines with sudden or variable torque demands.
