B&R 8LSA55.DB030S100-3

The B&R 8LSA55.DB030S100-3 is a synchronous servo motor from B&R’s 8LS series, specifically configured for applications requiring a holding brake and a particular type of encoder.

B&R 8LSA55.DB030S100-3: Synchronous Servo Motor with Holding Brake

This part number precisely defines a specific configuration within B&R’s 8LS synchronous motor series. These motors are well-regarded for their compact design, high power density, and excellent dynamic performance, making them suitable for demanding industrial automation tasks.

Key Specifications and Features:

• Type: Synchronous Servo Motor
• Manufacturer: B&R Automation (now part of ABB)
• Series: 8LS
• Frame Size: Size 5 (indicated by “A55”). This larger motor size offers higher performance compared to smaller 8LS models. It has a centering diameter of 130 mm for mounting.
• Rated Speed: 3000 RPM (revolutions per minute).
• Nominal Torque: Approximately 11.6 Nm (Newton-meters).
• Stall Torque: Approximately 12.5 Nm.
• Nominal Current: Around 7.1 A.
• Stall Current: Around 7.7 A.
• Nominal Power: Approximately 3644 W.
• Maximum Torque: Can reach up to 41.4 Nm.
• Maximum Current: Up to 33 A.
• Maximum Speed: Can reach up to 9000 RPM.
• Voltage: Typically operates at 400 V.
• Shaft: Smooth shaft, meaning it does not have a keyway or spline. Note: One source indicates “shaft key” for DB configuration, but common 8LS “DB” models often use smooth shafts with holding brakes.
• Connectors: Features angled swivel connectors, providing flexibility for cable routing.
• Brake: The “DB” in the part number explicitly indicates that this motor includes a holding brake.
  • Holding Torque of Brake (MBr): 15.00 Nm. This brake is designed to hold the load in position when power is removed or during a stop, preventing unwanted movement.
• Protection Class: IP64, indicating it is protected against dust ingress and splashing water from any direction.
• Cooling: Self-cooling (construction type A), relying on natural convection for heat dissipation.
• Pole Pairs: Typically 4 pole pairs.
• Feedback System: The “S100” refers to the encoder system. For 8LS motors, “S” typically denotes a single-turn absolute encoder, often an EnDat inductive 32-line single-turn encoder. This provides precise position feedback within one revolution.
• Embedded Parameter Chip: B&R 8LS motors come with an embedded parameter chip within the encoder that stores all relevant mechanical and electrical information. This enables the paired B&R ACOPOS servo drive to automatically identify the motor and configure itself for optimal control, simplifying commissioning.
• Version: The “-3” typically indicates a specific version or revision of the motor.
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Decoding the Part Number:

• 8LS: Denotes the 8LS Synchronous Motor series.
• A55: Specifies the motor type and dimensions (self-cooled, flange-mounted, Size 5).
• DB: Indicates the connection type and presence of a brake (angled swivel connectors, with brake).
• 030: Relates to the nominal speed (3000 rpm).
• S100: Specifies the integrated feedback system (single-turn absolute encoder).
• -3: Indicates the version or revision.

Typical Applications:

Given its higher power and torque, combined with the integrated holding brake, the B&R 8LSA55.DB030S100-3 is ideal for applications where:

• Vertical Axes: Holding loads in position against gravity, such as in lifting mechanisms, gantries, or robotic arms.
• Precision Positioning: Where the motor needs to accurately stop and hold a position without drift, even when power is off.
• Emergency Stops: Providing a reliable braking function for safety.
• Machine Tools: For axes requiring both dynamic motion and secure holding.
• Automation Systems: In various machinery that requires controlled stops and static holding of components.