B&R 8LSA46.R0045D000 | Size 4 Frame 4.7 Nm Servo

Description

B&R 8LSA46.R0045D000 | Size 4 Frame 4.7 Nm Servo

Dynamic Product Introduction

Running a high-speed pick-and-place matrix at 4500 RPM demands a motor frame that handles extreme switching frequencies without breaking down winding insulation. The 8LSA46.R0045D000 was designed specifically for these high-velocity applications. By combining an extended Size 4 stack length (Length 6) with high-density stator windings, B&R delivers ~4.7 Nm of continuous stall torque while pushing velocity limits beyond standard 3000 RPM base motors.

What makes this unit invaluable during line upgrades is how well it balances thermal dissipation with electrical response. Paired with ACOPOS servo drives, the integrated EnDat absolute encoder handles real-time position transmission over digital serial lines. Drive initialization requires zero manual parameter entry — the inverter reads motor inductance, peak current caps, and thermal profiles straight from the motor’s embedded electronic nameplate the moment power hits the backplane.

8LSA46.R0045D000

Key Technical Specifications

Global Sourcing & Live-Test SOP (Transparency Core)

Procuring surplus or replacement motion hardware requires absolute testing rigor. Installing a motor with worn bearing races or corrupted encoder memory can halt an entire production bay. Every unit undergoes strict multi-point verification before leaving our test facility:

1. Inbound Mechanical & Label Traceability:

   We run physical inspections on shaft radial runout using dial indicator gauges and cross-reference serial numbers against OEM production databases to flag counter-labelled units.

2. ACOPOS Bench Simulation Setup:

   The unit mounts to a dedicated test stand interfaced with an authentic ACOPOS drive system and an Automation Studio controller.

3. Diagnostic Test Execution:
   • Electronic Nameplate Interrogation: We verify that the drive reads the motor’s internal EnDat chip clean, auto-loading correct coil resistance, inductance, and thermal limits without bit-stream errors.
   • High-Speed Dynamic Profile: The motor undergoes a 3-hour velocity profiling run reaching 4500 RPM, tracking housing temperature rise and bearing vibration signatures.
   • High-Voltage Winding Insulation Test: A 1000V DC surge test verifies phase-to-phase and phase-to-ground isolation levels.
4. ESD Sealing & Dispatch Prep:

   Shaft ends are coated with rust-inhibiting film and protected with caps. The complete assembly is wrapped in anti-static ESD shielding and suspended in custom high-impact foam packing.

The Field Engineer’s Pitfall Guide

• ❗ EnDat Commutation Misalignment:

  Do not loosen the rear encoder cover plate under any circumstances. On B&R motors, the absolute optical encoder’s zero position is factory-aligned to the rotor’s permanent magnet poles. Loosening the mounting screws shifts the phase offset, causing the ACOPOS drive to throw immediate Commutation Angle Error or drawing extreme current spikes upon enabling the power stage.

• ❗ Mating Cable Shielding Failures at High RPM:

  Because this motor operates at 4500 RPM, PWM switching noise from the inverter is significantly higher than on standard 3000 RPM units. Using unshielded motor power cables or failing to earth the cable shield clamp near the ACOPOS drive causes high-frequency noise injection into the EnDat signal lines, resulting in random motion trips and position drift.

• ❗ Forcing Connector Rotation Under Tension:

  While the SpeedTEC dual right-angle connectors swivel for convenient cable routing, swiveling them while the mating plug is fully locked will twist and shear internal stator lead wires. Always unlock and disconnect the mating cable before adjusting the connector orientation.

Intent-Driven FAQ

Will my ACOPOS drive recognize this motor automatically upon installation?

Yes. As long as your drive runs standard B&R motion blocks in Automation Studio, the ACOPOS inverter reads the embedded EnDat electronic nameplate at startup. It automatically configures internal current loops, velocity scaling, and thermal shutoff thresholds without manual entry.

What is the main difference between the 8LSA46 and 8LSA45 series?

The primary difference lies in the rotor core length. The 8LSA46 uses a Length 6 stack, providing higher continuous stall torque (~4.7 Nm vs ~3.8 Nm for the 8LSA45) within the same Size 4 mounting flange footprint.

Can I run this motor at 4500 RPM continuously without external cooling fans?

Yes, provided ambient temperatures stay within 0^\circC to +40^\circC and you maintain a minimum 50mm clearance around the motor body for natural convection. If operating in confined enclosures above 40^\circC, you must de-rate output power by 1% per degree Celsius.

What causes an immediate overtemperature fault on the drive after connecting a new motor?

This almost always traces to an improperly seated encoder cable. The motor’s internal thermal sensor signal routes through specific pins inside the feedback connector. An unseated connector or pushed-back pin creates an open circuit, causing the drive to read an artificial open-loop temperature reading above 150^\circC.

How can I verify that a replacement 8LSA46 motor is genuinely unissued stock?

Inspect the mounting face counterbores and connector contacts. Unused factory-sealed units show zero compression marks around the flange bolt holes, pristine gold plating on the connector pins without insertion tracking, and protective caps intact on the shaft and connectors.