BECKHOFF AM8000 - Manual (Page 18)

6 Technical description Drive Technology
18 Version: 2.4 AM8000 and AM8500
6.3.12 Pole number
Motor Poles Motor Poles
AM801x 6 AM805x, AM855x 8
AM802x 6 AM806x, AM856x 10
AM803x, AM853x 8 AM807x 10
AM804x, AM854x 8
6.4 Options
Holding brake
The holding brake is integrated in the motor. It increases the motor length and the rotor moment of inertia.
Radial shaft-sealing ring
Radial shaft-sealing ring (FKM) for sealing against splash water. This increases the protection class of the shaft
bushing to IP65.
Feather key
The motors are available with feather key groove and fitted feather key according to DIN6885. The rotor is
balanced with half a feather key.
Resolver
This model features a different feedback system in place of the OCT or the hyperface.
Note
Installation options and reduction of rated values
With the exception of the sealing ring, the options cannot be retrofitted.
The option sealing ring can lead to a reduction of the rated data.
6.5 Selection criteria
The three-phase servomotors are designed for operation with servo drives.
Both units together form a speed or torque control loop.
The main selection criteria are:
— Standstill torque M0 [Nm]
— Maximal torque Mmax [Nm]
— Rated speed at rated supply voltage nn [min-1]
— Moment of inertia of motor and load J [kgcm²]
— Effective torque (calculated) Mrms [Nm]
The static load and the dynamic load (acceleration/braking) must be taken into account in the calculation of the
required motors and servo drives. Formulas and calculation example are available from our applications
department on request.