B&R 8LSA55 Synchronous Servo Motor

Product Brief Introduction: The B&R 8LSA55 is a large-frame synchronous servo motor engineered for high-power applications. It delivers substantial continuous torque and is built for rugged industrial environments where reliability and performance are critical. It is a key component for heavy machinery axes.
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Technical Specifications:
Frame Size: 55 (Large)
Rated Torque: Typically 10 Nm to 25 Nm range
Max Speed: Up to 5000-6000 rpm
Power Rating: Several kW range
Cooling: Often requires forced ventilation for continuous high load
Protection: IP65 standard
Brake Option: 24VDC holding brake available
Functional Features:
Extreme robustness for heavy industrial use.
High thermal capacity allows for sustained high loads.
Precision feedback systems for large-mass positioning.
Low maintenance design with sealed bearings.
Compatible with B&R ACOPOS multi and P3 drives.
Application Scenarios:
Presses and stamping machines.
Large gantry robots.
Crane and hoist drives.
Heavy conveyor belts.
Wind turbine pitch control (specific variants).
Performance Parameters:
Overload capability: 300% for short durations.
Mechanical rigidity: High shaft stiffness to minimize wind-up.
Acoustic noise: Optimized for lower dB levels despite size.
Structural Characteristics:
Heavy-duty housing construction.
Reinforced bearing shields.
Large terminal box or heavy-duty connector interface.
Lifting eyes or mounting lugs for safe handling due to weight.
Working Principle:
Standard PMSM operation. Due to its size, thermal management is critical; heat generated in windings is conducted through the stator stack to the housing and dissipated via convection or forced air. The drive regulates current vectors to maintain synchronism under heavy inertial loads.
Installation Requirements:
Requires two-person lift or hoisting equipment for installation.
Ensure foundation or mounting structure can support static and dynamic loads.
Check alignment with laser tools for long shaft couplings.
Verify brake release voltage if equipped.
Usage Notes:
Regularly inspect mounting bolts for tightness due to high vibration potential.
Ensure cooling fans (if external) are operational before full load.
Do not disconnect motor cables while drive is powered.




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