Description
Product Introduction & Engineering Value
The B&R 8LSA46.R0045D000-0 is a high-performance synchronous servo motor from the 8LS series, designed for industrial motion systems requiring accurate speed and position control. The motor uses resolver feedback, self-cooling construction, and is intended for integration with B&R ACOPOS motion platforms.
In production environments, servo motor failures rarely appear as simple electrical faults. A worn bearing, damaged feedback system, or incorrect replacement can create following errors, positioning drift, and repeated drive alarms. Matching the exact motor code is essential to preserving existing machine tuning and axis behavior.
Technical Specifications
| Specification | Details |
|---|---|
| Manufacturer | B&R Industrial Automation |
| Model Number | 8LSA46.R0045D000-0 |
| Motor Series | 8LSA |
| Motor Type | Permanent magnet synchronous servo motor |
| Frame Size | 46 |
| Rated Speed | 4500 rpm |
| Feedback Type | Resolver |
| Cooling Method | Natural self-cooling |
| Shaft Design | Smooth shaft |
| Brake Option | Without holding brake |
| Mounting Type | Flange mounting |
| Drive Compatibility | B&R ACOPOS servo systems |
| Protection Class | IP64/IP65 class depending on configuration |
| Connector Type | Industrial circular connectors |
| Application Category | High dynamic motion control |
Field Application & The “Trench” Experience
A machine builder operating a high-speed printing and web-processing line began receiving intermittent servo following-error alarms on one tension-control axis. The drive fault appeared only during rapid acceleration cycles, making the mechanical system look suspicious.
Technicians first checked the coupling, gearbox backlash, and roller alignment. Mechanical inspection showed no significant problems.
The troubleshooting team then reviewed the servo feedback path. Resolver signals from the original motor became unstable as the motor temperature increased. A replacement B&R 8LSA46.R0045D000-0 was installed, the ACOPOS parameters were restored, and the axis was recalibrated.
Production resumed without changing the machine mechanics.
The field lesson: feedback instability can imitate mechanical wear. Always test the motor, resolver, and drive together.
Typical application scenarios:
- Printing press tension-control axes
- Packaging machine synchronized rollers
- CNC auxiliary positioning systems
- Robotic transfer and handling equipment
- Precision assembly machinery
8LSA46.R0045D000-0
Transparency SOP: QA & Testing
Servo motors are tested as complete electromechanical assemblies.
Verification workflow:
1. Identification Check
- Confirm B&R nameplate.
- Verify model: 8LSA46.R0045D000-0.
- Check connector style and mechanical options.
2. Mechanical Inspection
- Rotate shaft manually.
- Check bearing noise.
- Inspect flange condition.
- Verify shaft surface.
3. Electrical Testing
- Measure winding resistance.
- Perform insulation resistance testing.
- Check phase balance.
- Verify temperature sensor circuit.
4. Resolver Testing
- Confirm resolver excitation.
- Measure feedback response.
- Check signal stability.
5. Motion Simulation
- Connect to compatible servo drive.
- Perform motor recognition.
- Verify rotation direction.
- Confirm speed response.
6. Documentation
- Record inspection results.
- Save test measurements.
- Classify inventory:
- New Surplus
- Refurbished
- Tested Used
The Veteran’s Tech Trap Guide
⚠️ Trap #1: Confusing Resolver and Encoder Versions
The 8LSA46.R0045D000-0 uses resolver feedback.
Before replacement, confirm:
- Feedback interface
- ACOPOS drive compatibility
- Existing motor configuration
A motor with the wrong feedback system may install physically but fail commissioning.
⚠️ Trap #2: Skipping Axis Parameter Backup
Servo motors depend on correct drive configuration.
Save:
- Motor identification data
- Position loop parameters
- Velocity settings
- Machine limits
PRO TIP: Backup the ACOPOS configuration before removing the original motor.
⚠️ Trap #3: Ignoring Mechanical Matching
Verify:
- Flange dimensions
- Shaft diameter
- Connector orientation
- Mounting clearance
Emergency replacements often fail because mechanical details were checked too late.
Dynamic FAQ
Q1. What is the B&R 8LSA46.R0045D000-0 used for?
The B&R 8LSA46. is a synchronous servo motor designed for precision motion applications using B&R ACOPOS control systems.
Q2. What is the rated speed of the 8LSA46.R0045D000-0?
This motor is rated for approximately 4500 rpm operation.
Q3. What feedback system does this motor use?
The 8LSA46. uses a resolver feedback system for closed-loop speed and position control.
Q4. Does this servo motor include a holding brake?
No. The D000 configuration indicates a version without an integrated holding brake. Brake-equipped versions use different ordering codes.
Q5. What should buyers verify before purchasing a New Surplus 8LSA46.R0045D000-0?
Recommended checks:
- Exact B&R part number
- Resolver compatibility
- ACOPOS drive matching
- Shaft and flange dimensions
- Winding resistance test
- Feedback verification
- Warranty coverage
Q6. Can a refurbished 8LSA46.R0045D000-0 be used in production equipment?
Yes, provided it has passed insulation testing, resolver verification, mechanical inspection, and operational testing with a compatible B&R motion system.
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