Parker EME
Setting up Compax3
192-120103 N13 C3I20T11 / C3I32T11 December 2010
173
Nominal point data
In this chapter you can read about:
Motor characteristic line of a synchronous servo motor (torque via velocity) .................. 173
Calculation of the reference current from the characteristic line. .................................... 173
The nominal point data can be found in the velocity characteristic line of the motor.
The prespecified nominal point can be changed in the 2nd wizard page of the C3
ServoManager configuration with the aid of "activate change of reference point" via
the reference velocity and the reference current.
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:
Standstill current [mA
rms
]
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.
