B&R 8MSA4X Synchronous Servo Motor

Product Brief Introduction: The B&R 8MSA4X typically denotes a special or extended version within the Size 4 family, often referring to an "Extra Long" stack or a specific custom winding/configuration not covered by standard S/M/L designations. It provides the maximum possible torque for the Size 4 frame.
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Technical Specifications:
Frame Size: 80 mm (Size 4)
Rated Torque: Typically 6.0 Nm to 9.0 Nm (depending on specific sub-model)
Peak Torque: Up to 25 Nm (3x rated torque for short durations)
Rated Speed: 3000 rpm to 6000 rpm
Rotor Inertia: Approx. 18-25 kgcm²
Protection Class: IP65 (standard), IP67 (optional)
Insulation Class: F (155°C)
Feedback System: EnDat 2.2, HIPERFACE DSL, or Resolver
Connection: SpeedTec ready or standard connector
Cooling: Self-cooled (IC 410) or Forced ventilation (IC 416)
Functional Features:
Extremely high torque-to-volume ratio for compact machine design.
Low cogging torque ensures smooth motion at low speeds.
High overload capacity allows for rapid acceleration of high-inertia loads.
Integrated thermal monitoring protects against overheating.
Compatible with B&R ACOPOS servo drive systems for precise control.
Robust bearing design supports high radial and axial loads.
Application Scenarios:
Heavy-duty robotics and handling systems.
Main drives in packaging machinery (e.g., form-fill-seal).
Machine tool axes requiring high stiffness.
Printing and converting machines.
Textile machinery with high dynamic requirements.
Structural Characteristics:
Aluminum housing with optimized cooling ribs for heat dissipation.
Sealed connector interface prevents ingress of dust and liquids.
Compact axial length relative to torque output compared to older technologies.
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. This field interacts with the permanent magnets on the rotor to generate torque. High-resolution feedback devices provide real-time position and speed data to the drive controller, enabling precise closed-loop regulation of torque, speed, and position.
Installation Requirements:
Mount on a rigid, flat surface to ensure shaft alignment and prevent vibration.
Ensure adequate clearance around the motor for cooling airflow.




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