B&R 8LSA46 Synchronous Servo Motor

Product Brief Introduction: The B&R 8LSA46 is a medium-frame synchronous servo motor designed for demanding automation tasks. It offers a balance between high torque output and compact size, making it suitable for main axes in larger machines or heavy-duty handling applications. It integrates seamlessly into the B&R ACOPOS drive ecosystem.
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Technical Specifications:
Frame Size: 46 (Medium)
Rated Torque: Typically 4.0 Nm to 9.0 Nm range
Rated Speed: Up to 6000 rpm
Peak Current: High overload capacity for dynamic moves
Encoder Options: Absolute multi-turn or incremental
Voltage Class: 400V AC bus compatible
Ambient Temperature: -20°C to +40°C (standard), up to +55°C with derating
Functional Features:
High torque-to-inertia ratio for fast acceleration/deceleration.
Precision manufacturing ensures low vibration and noise.
Flexible feedback options for various accuracy requirements.
Optimized magnetic circuit for high efficiency.
Durable surface treatment for industrial environments.
Application Scenarios:
Heavy-duty robotics.
Central drives in printing and paper processing.
Woodworking machinery.
Plastic injection molding machines.
Conveyor systems requiring high starting torque.
Performance Parameters:
Positioning accuracy: Dependent on feedback resolution (up to 23-bit absolute).
Speed stability: <0.01% of rated speed.
Thermal time constant: Optimized for intermittent high-load cycles.
Structural Characteristics:
Robust steel or aluminum housing.
Large diameter shaft for high torsional stiffness.
Integrated cable exit or radial exit options.
Precision machined flange for accurate mounting.
Working Principle:
Utilizes rare-earth permanent magnets on the rotor. The stator’s three-phase winding creates a rotating field synchronized with the rotor position. Commutation is electronic, controlled by the servo drive based on encoder feedback, ensuring precise torque control at any speed.
Installation Requirements:
Align motor shaft with driven load carefully to prevent bearing wear.
Install coupling guards where necessary.
Ensure cable bend radius is not exceeded to prevent wire breakage.
Ground the motor housing effectively.
Usage Notes:
Monitor motor temperature during initial commissioning.
Avoid mechanical shocks to the encoder assembly.
Use only B&R approved cables and connectors for warranty compliance.
Store in a dry environment if not installed immediately.




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