Lenze 9400 - Manual (Page 217)

Lenze · Servo-Inverter 9400 HighLine · Reference manual · DMS 10.0 EN · 11/2013 · TD05/06
217
5 Motor interface
5.9 Monitoring
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
Speed-dependent evaluation of the motor current
By selecting a characteristic in
C01196/1...8 the permissible motor current is evaluated depending
on speed for calculating the thermal motor utilisation.
• The speed-dependent evaluation can be more or less switched off by setting C01196/1...8 to
"100 %" each. The calculation simplified due to this setting corresponds to the calculation in
previous Lenze devices (e.g. 9300 servo inverter or ECS).
Parameter Characteristic point
C01196/1 n
1
/n
n
Speed = "0" (standstill)
C01196/2 I
1
/I
n
Permissible motor current at standstill
C01196/3 n
2
/n
n
Speed from which the torque must be reduced for self-ventilated motors.
• Below this speed the cooling air flow of the integral fan is not sufficient
anymore.
C01196/4 I
2
/I
n
Permissible motor current at speed n
2
(torque reduction)
C01196/5 n
3
/n
n
Rated speed
C01196/6 I
3
/I
n
Permissible motor current at rated speed
C01196/7 n
4
/n
n
Speed above the rated speed (in the field weakening range for asynchronous
motors)
C01196/8 I
4
/I
n
Permissible motor current at speed n
4
(field weakening)

Note!
Self-ventilated standard motors are protected insufficiently at low speeds by setting
C01196/1...8 to "100 %" each.
Servo motors, however, do not have a point from which the torque must be reduced due
to a too low speed.
• When setting the characteristic in C01196/1...8 this point must not be ignored. Hence,
point 2 is to be set ideally to point 1 or point 3.