Product Short Description
Product Introduction:
The 8LSA46 is a permanent‑magnet synchronous servo motor (AC servo) from B&R’s 8LS family, size 4 with a “46” frame designation. It features high power density, low rotor inertia, and smooth sinusoidal commutation for precision motion control. It is typically paired with ACOPOS P3 (8EI…017X) drives.
Description
Technical Specifications (representative 8LSA46.I9060J200‑4):
|
Parameter
|
Value
|
|---|---|
|
Nominal speed
|
6000 rpm
|
|
Maximum speed
|
6600 rpm
|
|
Pole pairs
|
5
|
|
Nominal torque
|
5 Nm
|
|
Nominal power
|
3142 W
|
|
Nominal current
|
6.2 A
|
|
Stall torque
|
10 Nm
|
|
Stall current
|
12.3 A
|
|
Maximum torque
|
38 Nm
|
|
Maximum current
|
72.9 A
|
|
Torque constant (KT)
|
0.81 Nm/A
|
|
Voltage constant (KE)
|
49.22 V/1000 rpm
|
|
Stator resistance (R2ph)
|
0.53 Ω
|
|
Stator inductance (L2ph)
|
4.3 mH
|
|
Electrical time constant
|
8 ms
|
|
Thermal time constant
|
27 min
|
|
Rotor moment of inertia (J)
|
4 kg·cm²
|
|
Weight without brake
|
7.14 kg
|
|
Holding brake torque
|
15 Nm (optional brake adds 1 kg)
|
|
Encoder options
|
I9 EQI1131, E30 multi‑turn inductive
|
|
Shaft end
|
Smooth shaft
|
|
Motor cable cross‑section
|
1.5 mm²
|
|
Connector size
|
1.0
|
|
Certifications
|
CE, UKCA, cURus E235396
|
|
Recommended drive
|
ACOPOS P3 8EIxxxx…017X
|
Functional Features:
-
High‑speed capability up to 6600 rpm
-
Low rotor inertia for rapid acceleration/deceleration
-
Inductive multi‑turn encoder option (E30) provides absolute position without battery backup
-
Integrated holding brake option for vertical axis applications
-
Optimized for seamless integration with ACOPOS P3 drives
Material & Structural Characteristics:
-
Stator: Grain‑oriented silicon steel laminations
-
Rotor: High‑energy NdFeB permanent magnets
-
Housing: Aluminium alloy with anodised finish
-
Shaft: Hardened alloy steel with optional chrome plating
-
Bearings: Sealed deep‑groove ball bearings, grease‑lubricated
-
Connector: Size 1.0 industrial circular connector, gold‑plated contacts
-
Cooling: Natural convection (self‑cooling)
Working Principle:
A 3‑phase permanent‑magnet synchronous motor where the stator’s rotating magnetic field, generated by the ACOPOS drive, interacts with the rotor’s NdFeB magnets to produce torque. The integrated encoder provides real‑time position feedback for closed‑loop control.
Application Scenarios:
-
High‑speed spindle and rotary axis applications
-
Packaging machinery, printing presses, textile machines
-
Robotics and pick‑and‑place systems
-
CNC machine tool feed axes
Installation Requirements:
-
IEC B5 flange mounting (4× threaded holes)
-
Ensure adequate clearance for cooling airflow (natural convection)
-
Use B&R‑specified motor cables with 1.5 mm² cross‑section
-
Align coupling properly to avoid radial/shaft loads exceeding bearing specifications
-
For brake version, connect brake power via dedicated drive output
Usage Precautions:
-
Do not exceed maximum speed of 6600 rpm
-
Peak torque of 38 Nm is permissible only for short durations as defined by the thermal time constant
-
Operating temperature should remain within the drive‑configured limits (typically 0–40 °C ambient for full rating)
-
Avoid mechanical shock exceeding bearing specifications
-
Use only with recommended ACOPOS P3 drive to ensure parameter auto‑recognition
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