Lenze DSD - Manual (Page 426)

17 Restrictions of the drive dimensioning
17.1 Field weakening
426
Lenze · Drive Solution Designer · Manual · DMS 4.2 EN · 12/2013 · TD23
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17 Restrictions of the drive dimensioning
Many thousand dimensioning processes have been carried out with the DSD, during which the pro-
gram has stood the test of time.
• Important information, release notes on the DSD, and tips and tricks can be found:
• in the "Application Knowledge Base" (AKB) under http://AKB.Lenze.de
• in the "Services & Downloads" area under http://www.Lenze.com .
• Also use the weblinks in the Help menu.
• The dimensioning includes the components gearbox, motor, inverter, encoder, electrical brake
units, regenerative power supply modules, and electromechanical brakes.
• Further accessories (e. g. mains filters, automation modules, drive software) at present are not
yet configured by the DSD and can for example be determined via the DSC.
• Current data and features of the Lenze products can be gathered from the documentation for
the respective product.
The following chapters describe restrictions with regard to the drive dimensioning by means of the
DSD. In these cases the DSD does not carry out checks, or only to a limited extent. You have to carry
out the checks manually.
17.1 Field weakening
Changes in the dynamic behaviour of the motor in the field weakening operation are not checked
in the DSD.

Note!
Only relevant for drive systems which are to be operated above the rated speed
(n
max
> n
rated
).
• Typical applications for this are: winding, traverse and infeed drives with rapid feed
under partial load!
• DSD outputs a message when the field weakening operation is reached:
• Synchronous motors: n
max
> 2.0 n
rated
• Asynchronous motors: n
max
> 5.0 n
rated