Beckhoff AMI8100, Operating Instructions Manual

Page: 25 / 61

Technical data
Version: 1.0 ─── 25 AMI8100
Voltage constant K
Erms
[mVmin]
Indication of the induced servo drive EMK at 20 °C, based on
1000 rpm. This is specified as the sine RMS value between two ter-
minals.
Rotor moment of inertia J [kgcm²]
Measure of the acceleration capacity of the servo drive. For exam-
ple, at J
0
the acceleration time t
b
from 0 to 3000 rpm can be calcu-
lated based on the following formula:
4
0
3000 2 ²
[ ]
60 10 ²
b
m
t S J
M s cm
p *
= * *
*
with M
0
in Nm and J in kgcm
2
Thermal time constant t
TH
[min]
Specification of the heating time of the cold servo drive under load
with I
0
until an overtemperature of 0.63 x 100 Kelvin is reached. This
temperature rise happens in a much shorter time when the motor is
loaded with the peak current.
Release delay time / application delay time of the
brake t
BRH
[ms]/t
BRL
[ms]
Specification of the response times of the holding brake [+] when
operated with the nominal voltage
Winding inductance L [mH]
Specification of the servo drive inductance. It is the average value
for one revolution, with two energized phases, at 1 kHz. Saturation
of the servo drive must be taken into account.