B&R 8LSA35 Synchronous Servo Motor

Product Brief Introduction: The B&R 8LSA35 is a high-dynamic synchronous servo motor from the B&R Automation portfolio. It is designed for applications requiring high torque density and compact installation dimensions. This motor series typically features high overload capability and is optimized for use with B&R ACOPOS servo drives, ensuring precise motion control in packaging, robotics, and machine tool applications.
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Technical Specifications:
Rated Torque: Varies by specific sub-model (typically 1.0 Nm to 3.5 Nm range)
Rated Speed: 3000 rpm to 6000 rpm (depending on winding)
Peak Torque: Up to 3.5 times rated torque
Protection Class: IP65 (standard), IP67 (optional)
Insulation Class: F (155°C)
Feedback System: EnDat 2.2, HIPERFACE, or Resolver (model dependent)
Connection Type: Plug-in connector system (SpeedTec or similar)
Cooling: Self-cooled (IC 410) or Forced ventilation (IC 416)
Functional Features:
High power density allowing for smaller motor footprint.
Low cogging torque for smooth running at low speeds.
Excellent dynamic response due to low rotor inertia.
Integrated thermal monitoring via PTC or KTY sensors.
Compatible with single-cable technology (OCT) for simplified wiring.
Robust bearing design for long service life.
Application Scenarios:
Packaging machinery (filling, labeling).
Robotics and handling systems.
Machine tools (axis drives).
Textile machinery.
Printing presses.
Performance Parameters:
Efficiency: >90% at rated load.
Torque ripple: <3%.
Dynamic overload capacity: High short-time torque availability.
Structural Characteristics:
Compact aluminum housing with optimized cooling ribs.
Flange mounting according to IEC standards.
Shaft end with keyway or smooth shaft options.
Sealed connector interface for harsh environments.
Working Principle:
Operates as a permanent magnet synchronous motor (PMSM). The stator windings are energized by a frequency-controlled inverter to create a rotating magnetic field that interacts with the permanent magnets on the rotor, generating torque. Feedback devices provide real-time position and speed data to the drive controller for closed-loop regulation.
Installation Requirements:
Mount on a rigid, flat surface to ensure alignment.
Ensure adequate clearance for cooling airflow.
Use shielded motor cables to prevent electromagnetic interference (EMI).
Verify compatibility of feedback system with the connected servo drive.
Follow torque specifications for mounting bolts and connector screws.




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