Product Short Description
Product Introduction:
The 8LSA55 is a larger‑frame permanent‑magnet synchronous servo motor from the B&R 8LS family, size 5. It delivers higher continuous torque and power than the 8LSA46, designed for demanding single‑axis applications requiring robust dynamic performance. Compatible with ACOPOS, ACOPOSmulti, and ACOPOS P3 drive families.
Description
Technical Specifications (representative 8LSA55.ee045ffgg‑3):
|
Parameter
|
Value
|
|---|---|
|
Nominal speed
|
4500 rpm
|
|
Maximum speed
|
9000 rpm
|
|
Pole pairs
|
4
|
|
Nominal torque
|
9.5 Nm
|
|
Nominal power
|
4477 W
|
|
Nominal current
|
8.7 A
|
|
Stall torque
|
12.5 Nm
|
|
Stall current
|
11.5 A
|
|
Maximum torque
|
41.4 Nm
|
|
Maximum current
|
47.3 A
|
|
Torque constant (KT)
|
1.09 Nm/A
|
|
Voltage constant (KE)
|
65.97 V/1000 rpm
|
|
Stator resistance (R2ph)
|
0.51 Ω
|
|
Stator inductance (L2ph)
|
4.96 mH
|
|
Electrical time constant
|
9.7 ms
|
|
Thermal time constant
|
40 min
|
|
Rotor moment of inertia (J)
|
8.19 kg·cm²
|
|
Weight without brake
|
10.4 kg
|
|
Holding brake torque
|
15 Nm (brake mass 1.5 kg)
|
|
Brake inertia (JBr)
|
1.66 kg·cm²
|
|
Connector size
|
1
|
|
Motor cable cross‑section
|
0.75 mm²
|
|
Certifications
|
CE, UKCA
|
|
Recommended drives
|
ACOPOS 8Vxxxx.xx…1180; ACOPOSmulti 8BVIxxxx…0110; ACOPOS P3 8EIxxxx…013X
|
Functional Features:
-
Higher torque density than size 4 motors (9.5 Nm continuous)
-
Capable of 9000 rpm maximum speed for high‑throughput applications
-
Compatible across three generations of B&R ACOPOS drive platforms
-
Optional holding brake with 15 Nm retention for vertical loads
-
Self‑cooling design with aluminium housing for optimal heat dissipation
Material & Structural Characteristics:
-
Stator: Silicon steel laminations, optimised for low losses
-
Rotor: NdFeB permanent magnets, high‑coercivity grade
-
Housing: Aluminium alloy, anodised for corrosion resistance
-
Connector: Size 1 circular industrial connector
-
Bearings: Heavy‑duty sealed ball bearings for 10.4 kg rotor mass
-
Shaft: Hardened steel with keyway option
Application Scenarios:
-
Main drive axes in large packaging and converting machinery
-
Print cylinder drives in high‑speed printing presses
-
Robotics joints requiring high torque at moderate speed
-
CNC machining centres, particularly feed and spindle axes
Installation Requirements:
-
IEC B5 flange mounting with appropriate bolt torque
-
Adequate clearance for natural convection cooling (minimum 50 mm around motor body)
-
Use shielded motor cables with 0.75 mm² cross‑section
-
For brake version, connect brake release circuit to drive’s dedicated output
-
Earth grounding resistance ≤ 1 Ω
Usage Precautions:
-
Maximum speed 9000 rpm must be limited via drive parameter to prevent mechanical damage
-
Peak torque 41.4 Nm is permitted only for short durations within thermal limits
-
Continuous operation above 40 °C ambient requires power derating
-
Do not disassemble the encoder housing – calibration will be lost
-
Ensure the drive is compatible (ACOPOS, ACOPOSmulti, or ACOPOS P3 with correct firmware)
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