Lenze DSD - Manual (Page 467)

Lenze · Drive Solution Designer · Manual · DMS 4.2 EN · 12/2013 · TD23
467
18 Drive dimensioning messages
18.8 Inverters
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18.8.7 Current resolution is not adapted to the motor
18.8.8 Utilisation of the inverter >100 %
18.8.9 Utilisation of the inverter too high after mains connection
Note!
The current resolution of the inverter is not adapted to the motor. The rated motor current is vvv A. Thus
the max. output current of the inverter of www A is much greater than the rated motor current.
The factor for the ratio of the rated motor current and the max. output current of the inverter is xxx.
The factor is still reasonable.
The factor zzz must not be exceeded.
Note!
The current resolution of the inverter is not adapted to the motor. The rated motor current is vvv A. Thus
the max. output current of the inverter of www A is much greater than the rated motor current.
The factor for the ratio of the rated motor current and the max. output current of the inverter is xxx.
The factor is still reasonable.
The factor zzz must not be exceeded.
Cause Effects Possible remedies
Due to the high rated current of the
inverter compared to the rated mo-
tor current, the current detection in
the inverter is unfavourable with re-
gard to the motor currents.
Unfavourable control properties and
a disadvantageous behaviour with
regard to smooth running.
• Select a smaller inverter.
• Select an inverter with an over-
load behaviour that is better
adapted.
 Dimensioning criteria ( 346)
Warning!
The max. utilisation of the inverter is xxx %, regarding the power pulse current.
Thus the limit value of 100 % is exceeded.
Cause Effects Possible remedies
The inverter is overloaded by a too
high and too long current pulse (e.g.
due to an acceleration process).
The device is switched off with an er-
ror message due to device utilisation.
• Select a more powerful inverter.
• Change motion or load profile to
reduce the height or duration of
the current pulse.
Warning!
The I×t utilisation directly after mains connection and with max. ambient temperature is max. xxx %. The
drive cannot start with the motion profile.
Cause Effects Possible remedies
After mains connection, the inverter
is overloaded by a too high and too
long current pulse (e.g. due to an ac-
celeration process).
For safety reasons, a preload of the
inverter is assumed before mains
connection.
The device is switched off with an er-
ror message due to device utilisation.
• Switch on a load with a short de-
lay.
• Select a more powerful inverter.
• Change motion or load profile to
reduce the height or duration of
the current pulse.