Lenze DSD - Manual (Page 445)

Lenze · Drive Solution Designer · Manual · DMS 4.2 EN · 12/2013 · TD23
445
18 Drive dimensioning messages
18.2 Drive system
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18.2 Drive system
18.2.1 Utilisation >100 %, regarding the max. torque
18.2.2 In the DC-bus connection, the braking circuit of the inverter is not checked
18.2.3 In the DC-bus connection, the EMC protection of the device is ineffective
Warning!
The utilisation of the motor-inverter combination relative to the required max. torque of the application
is xxx %. Thus the limit value of 100 % is exceeded.
Cause Effects Possible remedies
The max. torque required by the ap-
plication is higher than the torque
provided by the motor-inverter com-
bination.
The drive cannot activate the appli-
cation:
• The acceleration capacity does
not suffice.
• The speed that is required is not
achieved.
• In the case of hoist drives, the load
can drop.
Check the max. torque on the basis of
the motor characteristic.
 M-n characteristic ( 316)
Note!
In the DSD, only one central braking circuit can be dimensioned.
In a DC-bus connection, the braking circuit of the inverter is ignored.
Cause Effects Possible remedies
In the DC-bus connection, the DSD
does not check the brake choppers in
the single drive axes.
• In the DSD, you can only dimen-
sion one central brake chopper for
the supply concept.
If the braking circuit of the single
drive axis is dimensioned incorrectly,
the brake chopper or brake resistor
will be destroyed.
Fire hazard!
• Only use the brake chopper when
the regenerative energy is dissi-
pated safely.
• Check the brake chopper of the
single drive axis manually.
• Use results calculated by DSD.
Note!
The EMC protection of the device is not effective in the DC-bus connection. Check whether EMC measures
are required for the entire DC-bus connection or machine.
Cause Effects Possible remedies
In the DC-bus operation, the EMC
protection integrated in the device is
not effective or only partially effec-
tive.
EMC Directives may possibly not ob-
served.
Take EMC measures for the entire
DC-bus connection or the entire ma-
chine.