Beckhoff AM8000 Series, Operation Instructions Manual

Page: 25 / 123

Technical data
Version: 4.3 ─── 25 AM8000 and AM8500
4.1
Definitions
Characteristic torque and speed curves
Detailed information on characteristic curves can be found under:
Beckhoff motor curves
External fan performance data
Detailed information on the performance data of the external fan
can be found in chapter:
"Performance data of the external fan", [
Page 93]
All data, with the exception of the voltage constant, are based on
40 °C ambient temperature and 100 K overtemperature of the wind-
ing. The data can have a tolerance of +/- 10 %.
If a gear unit is attached the power may be reduced by up to 20 %.
The A-side motor flange is intended for heat dissipation. If a gearbox
is attached, the heat dissipation is interrupted and reduces the
power of the motor.
By default, the engine heat via the A-flange is dissipated into the
machine bed. Due to heating of the gearbox, this is not possible for
thermal reasons. This configuration leads to a reduction of the rated
output.
4.1.1
Technical terms
This chapter provides information on various technical terms and
their meaning.
Standstill torque M
0
[Nm]
Torque, also referred to as starting torque, that the motor can gener-
ate at standstill. It can be maintained indefinitely at a speed n <
100 min
-1
and rated ambient conditions.
Rated torque M
n
[Nm]
The torque that the motor delivers when it is operated at nominal
speed and nominal current. Can be output in continuous operation
S1 for an unlimited period of time.
Standstill current I
0rms
[A]
Sinusoidal current RMS value. This is consumed at a speed of n <
100 min
-1
in order to generate the standstill torque.
Peak current/pulse current I
0max
[A]
Sinusoidal peak current RMS value. Corresponds to approx. five
times the standstill current and three times for AM806x, AM856x
and AM807x. The configured peak current of the servo drive used
must be less or equal.
Torque constant K
Trms
[Nm/A]
Indication of the torque in Nm generated by the motor per ampere of
standstill current. M
0
= I
0
x K
T
applies