8LSC54.ee045ffgg-4 | B&R 14.6 Nm Servo Motor

Introduction to the B&R 8LSC54.ee045ffgg-4

When your application demands precise motion control with high dynamic response, the 8LSC54.ee045ffgg-4 from B&R stands out. This three-phase synchronous servo motor is engineered for excellent positioning accuracy and compact size, making it ideal for modern industrial automation. With a nominal torque of 14.6 Nm and a maximum torque of 45.0 Nm, it handles heavy loads while maintaining smooth operation.

The motor's permanent-magnet design and electronic commutation ensure efficient performance. Its externally fan-cooled construction (IC4A0A6) keeps temperatures stable even during continuous duty. Rated for S1 continuous operation per EN 60034-1, it delivers reliable output without overheating. The insulation class F (IEC 60085) further enhances thermal resilience.

Key Features and Technical Specifications

The 8LSC54.ee045ffgg-4 offers a robust set of electrical and mechanical parameters that directly impact your system's performance. Below are the critical values you need to know:

• Nominal speed: 4500 rpm
• Number of pole pairs: 5
• Nominal torque: 14.6 Nm
• Nominal power: 6878 W
• Nominal current: 13.4 A
• Stall torque: 21.5 Nm
• Stall current: 19.6 A
• Maximum torque: 45.0 Nm
• Maximum current: 60.9 A
• Maximum speed: 5000 rpm
• Torque constant (KT): 1.09 Nm/A
• Voltage constant (KE): 65.97 V/1000 rpm
• Stator resistance (R2ph): 0.337 Ohm
• Stator inductance (L2ph): 4.3 mH
• Electrical time constant: 12.9 ms
• Thermal time constant: 40 min
• Moment of inertia: 9.8 kg·cm²
• Mass (without brake): 12.40 kg
• Holding torque of brake: 15 Nm
• Brake mass: 1.40 kg
• Moment of inertia of brake: 1.66 kg·cm²
• Cable cross-section: 4 mm²
• Connector size/type: 1
• Recommended servo drive (ACOPOS): 024X

These specs highlight the motor's ability to deliver high torque in a compact frame. The large overload capacity (up to 45.0 Nm) ensures it can handle peak demands without stalling. The low stator resistance and inductance contribute to fast electrical response, while the thermal time constant of 40 minutes allows for sustained high-load operation.

Applications and Use Cases

Thanks to its excellent dynamic characteristics and positioning precision, the 8LSC54.ee045ffgg-4 suits a wide range of industrial applications. Common use cases include packaging machinery, material handling, robotics, and machine tool spindles. Its compact size and reduced weight make it easy to integrate into space-constrained designs.

For example, in a high-speed labeling system, the motor's rapid acceleration and precise torque control ensure accurate label placement every cycle. In a robotic arm, the high stall torque (21.5 Nm) provides the strength needed for lifting payloads, while the maximum speed of 5000 rpm allows for quick movements. The motor's single-cable (hybrid) solution option simplifies wiring and reduces installation time, which is a significant advantage in multi-axis systems.

Installation and Setup

Proper installation is crucial for achieving optimal performance and longevity. The 8LSC54.ee045ffgg-4 follows standard mounting practices per EN 60034-7, supporting IM 3001 (horizontal), IM 3011, and IM 3031 orientations. The flange conforms to DIN 42948 Form A, and the shaft end meets DIN 748 Form E, ensuring compatibility with common couplings and pulleys.

When mounting, ensure the motor is aligned correctly to avoid undue stress on the shaft. The keyway (DIN 6885-1 Form A) and runout tolerance (DIN 42955 R) help maintain precision. For cooling, the externally fan-cooled design requires adequate airflow around the fan. The fan operates on 24 VDC or 230 VAC, depending on the version, and its noise level is specified at 53 dB(A) for the -4 generation. Always verify that the ambient temperature stays within -15°C to +40°C (max +55°C) to avoid derating.

Maintenance and Reliability

Routine maintenance ensures the motor operates reliably over its service life. Because the 8LSC54.ee045ffgg-4 is a brushless synchronous motor, there are no brushes to replace, reducing maintenance needs. However, periodic inspection of the fan and cooling passages is recommended to prevent dust buildup, which can impair cooling.

The motor's thermal protection (KTY83-110 / AM-PTC1000) monitors winding temperature and helps prevent overheating. With a maximum winding temperature of 155°C, the insulation system provides a generous safety margin. The vibration severity class A1 (per EN 60034-14) ensures smooth operation, minimizing wear on bearings. Bearing life follows DIN ISO 281, and the optional reinforced A-side bearing increases allowable radial/axial forces for demanding applications.

For long-term reliability, verify that the motor is operated within its specified environmental limits. The IP64 protection rating (with optional IP65 with oil seal) guards against dust and water ingress, making it suitable for washdown environments. Storage and transport conditions range from -20°C to +60°C with humidity up to 90% non-condensing.

Compatibility and Integration

The 8LSC54.ee045ffgg-4 is designed to work seamlessly with B&R's ACOPOS servo drives, specifically the recommended 024X model. This pairing ensures optimal tuning and performance. The motor supports both resolver and EnDat feedback systems, including safety-related variants, enabling functional safety applications such as STO (Safe Torque Off) when used with compatible ACOPOS drives.

The single-cable (hybrid) solution reduces wiring complexity by combining power and feedback in one cable. This not only saves space but also simplifies installation and troubleshooting. The motor's built-in plug-in connectors allow quick connection and disconnection, facilitating maintenance and replacement.

Troubleshooting and Common Issues

Even with robust design, occasional issues may arise. Here are some common scenarios and how to address them:

• Motor overheating: Check fan operation and ensure airflow is not blocked. Verify ambient temperature is within limits. If the motor has been running at high load continuously, allow cooling periods.
• Excessive vibration: Inspect shaft alignment and coupling balance. Loose mounting bolts can cause vibration; tighten to specified torque.
• Encoder errors: If using EnDat feedback, check cable connections and shielding. Ensure the encoder is not exposed to excessive heat or moisture.
• Brake issues: If the motor has an optional brake, verify that the holding torque (15 Nm) is sufficient for your application. Test the brake release function periodically.

For persistent problems, consult the official B&R documentation or contact Petro Auto Tech for technical support.

Frequently Asked Questions

What is the nominal torque of the 8LSC54.ee045ffgg-4?

The nominal torque is 14.6 Nm, with a maximum torque of 45.0 Nm for overload conditions.

What cooling method does this motor use?

It uses external fan cooling (IC4A0A6), with a 24 VDC or 230 VAC fan depending on the version.

Is the 8LSC54.ee045ffgg-4 compatible with ACOPOS drives?

Yes, it is recommended for use with ACOPOS 024X drives, ensuring optimal performance and safety integration.

What feedback options are available?

The motor supports resolver and EnDat (inductive/optical) feedback, including safety-related variants.

What is the maximum speed of this motor?

The maximum speed is 5000 rpm, while the nominal speed is 4500 rpm.

Product Support and Availability

The 8LSC54.ee045ffgg-4 is available from Petro Auto Tech, your trusted industrial automation parts supplier. We offer competitive pricing and fast shipping to minimize downtime. Contact our team for availability and lead times.