Description
Key Technical Specifications
| Parameter | Specification |
|---|---|
| Product Model | 8LSA46.R0045D000-0 |
| Manufacturer | B&R Industrial Automation |
| Product Series | 8LSA |
| Product Type | Synchronous Servo Motor |
| Motor Construction | Three-phase synchronous |
| Cooling | Self-cooled |
| Rated Speed | 4,500 RPM |
| Feedback | Resolver |
| Frame/Size | 8LSA46 / Size 4 family |
| Connector | Angled/swivel connection |
| Shaft | Smooth shaft |
| Brake | No holding brake indicated |
| Protection | IP64 reported for this variant |
| Application | Industrial servo motion control |
| Condition | New Surplus / Used / Tested Refurbished |
The most consistent published identification describes the unit as a B&R 8LS-series synchronous servo motor, with 4,500 RPM, resolver feedback, self-cooling, three-phase construction, and an angled swivel connection.
A caution on detailed ratings: some secondary listings assign conflicting torque, voltage, encoder, and power figures to this exact part number. One listing even associates the part number with a separate 8LSA46.EB030D000-0 description. Those figures should not be treated as confirmed specifications for 8LSA46.R0045D000-0 without the motor nameplate or B&R documentation.
Application Scenarios & Pain Points
Servo motor failures usually become production problems immediately. A worn bearing, damaged resolver circuit, or incorrect motor replacement can produce following errors, excessive current, vibration, or failed homing.
- Packaging machinery: Suitable for coordinated axes requiring controlled acceleration, deceleration, and repeatable positioning.
- Printing and converting: Servo motion is commonly used for synchronized rollers, feeders, and web-handling mechanisms where speed variation directly affects material quality.
- CNC and machine automation: The synchronous motor architecture suits applications requiring closed-loop speed and position control.
- Legacy B&R motion systems: This exact motor is particularly relevant when maintaining an established 8LS-based machine and the original motor has failed.
Field note: Before installing a replacement, rotate the shaft by hand and check for bearing roughness or abnormal mechanical noise. Then compare the nameplate carefully. A motor that fits the flange but has a different feedback configuration can waste an entire commissioning window.
8LSA46.R0045D000-0
Related Products
- B&R 8LSA46.R0045D000-0 — The exact motor specified here: 8LS-series synchronous servo motor, 4,500 RPM, resolver feedback, self-cooled construction.
- B&R 8LSA46.EB030D000-0 — Another 8LSA46 motor designation appearing in available references. It has different coded parameters and should not be treated as the same motor simply because the frame designation matches.
- B&R 8LSA55.EB030D200-1 — A larger 8LSA-family synchronous motor reference. Useful where a machine requires a different mechanical size or motor rating, but it is not a direct replacement for the 8LSA46.
- B&R 8LSA75.E1022D200-0 — Another 8LSA servo motor reference with a substantially different motor configuration. It is relevant to higher-capacity motion applications rather than direct substitution.
- B&R 8MSA3L.R0-30 — A different B&R servo-motor family. It may appear in B&R motion inventories but has a different motor platform and should not be substituted without drive and mechanical verification.
- B&R ACOPOS drive family — The associated motion-drive platform for many B&R servo applications. The drive’s configured motor data must match the installed motor rather than relying only on physical compatibility.
- B&R ACOPOSmulti — A modular motion-control platform that can be used with B&R servo motor systems. It is a drive-system component, not a replacement motor.
- B&R ACOPOSmicro — A compact B&R motion-drive platform for machine-axis applications. Selection depends on motor electrical characteristics and machine-axis requirements.
The Engineer’s Guide: Field Pitfalls to Avoid
⚠️ Do not select the motor from the frame size alone.
The 8LSA46 designation identifies the motor family and mechanical size, but the remaining code contains important motor-specific information. A similar-looking motor can have different feedback or speed characteristics.
How to avoid it: Match the complete 8LSA46.R0045D000-0 ordering code and nameplate. Do not substitute another 8LSA46 variant simply because the mounting dimensions appear identical.
⚠️ Resolver wiring must be verified.
This motor is identified with resolver feedback. A drive configured for another feedback technology may not recognize the motor correctly.
How to avoid it: Confirm the drive’s configured feedback type, resolver wiring, connector pinout, and motor identification parameters before energizing the axis.
⚠️ Do not trust conflicting online torque and voltage figures.
Available secondary listings provide inconsistent electrical specifications for this exact part number.
How to avoid it: Use the actual motor nameplate and applicable B&R motor data. If the nameplate is missing, treat the motor as requiring identification before commissioning.
Frequently Asked Questions (FAQ)
What is B&R 8LSA46.R0045D000-0?
It is a B&R 8LS-series synchronous servo motor intended for industrial motion-control applications. Available specifications identify it as three-phase, self-cooled, resolver-equipped, and rated at 4,500 RPM.
Is 8LSA46.R0045D000-0 a servo motor or servo drive?
It is a servo motor, not a drive. The motor requires a compatible B&R servo drive and correctly configured feedback interface for closed-loop operation.
What feedback does this B&R motor use?
Available product documentation identifies the specific as having resolver feedback.
Does 8LSA46. have a holding brake?
The available identification indicates no holding brake for this variant. Always verify the actual nameplate and machine documentation before assuming brake configuration.
Can I replace it with another B&R 8LSA46 motor?
Not automatically. Check the complete ordering code, rated speed, feedback system, shaft configuration, brake status, electrical data, and drive motor parameters. Same-frame does not mean electrically equivalent.
Is this model still available from B&R?
One current secondary reference identifies 8LSA46. as discontinued by the manufacturer. For a legacy machine, condition and exact-part-number verification therefore become important when sourcing a spare.
How should a used 8LSA46. be tested?
A proper evaluation should include:
- Visual inspection of the housing, shaft, connectors, and nameplate.
- Insulation and winding checks appropriate to the motor.
- Resolver continuity and signal verification.
- Bearing and shaft mechanical inspection.
- Low-speed operation with a compatible drive.
- Speed and feedback stability across the intended operating range.
