Setting
up Compax3
Positioning via digital I/Os
124
192-120101 N11 C3I11T11 November 2007
Motor characteristic line of a synchronous servo motor (torque via velocity)
SMH 60 30 1,4 ...2ID...4: 3000rpm at 400VAC
0
500
1000
1500
2000
2500
3000
0
0.5
1
1.5
2
2.5
3
3.5
S1 65°C DT
S3 50% 65°C DT
S3 20% 65°C DT
S1 105°C DT
[Nm]
[1/min]
1
2
2
[Motorkennlinie.emf /.jpg]
1: Nominal point
2: Forbidden range
Calculation of the reference current from the characteristic line.
T
K
Nm
M
EMK
Nm
M
I
]
[
5
,
85
]
[
=
•
=
or for linear motors
Kf
Nm
M
EMK
Nm
M
I
]
[
3
2
]
[
=
•
=
υ
In the MotorManager, a motor can be defined for different operating modes (230V,
400V and 480V) without having to create several entities.
Additional parameters of a motor are:
Standsill current [mA
r.m.s.
]
Pulse current [in % of the nominal current]
The pulse current can be provided by the Compax3 for the duration of the pulse
current time (as far as the device current permits). The thermal pulse load of the
motor rises due to the pulse current. This pulse load is monitored by the i²t
monitoring in the Compax3.
