Lenze DSD - Manual (Page 427)

Lenze · Drive Solution Designer · Manual · DMS 4.2 EN · 12/2013 · TD23
427
17 Restrictions of the drive dimensioning
17.2 Worldwide mains voltages and supply forms
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17.2 Worldwide mains voltages and supply forms
The DSD contains mains voltages and supply forms existing worldwide. Depending on the selection
that has been made, the DSD automatically assigns the available solution space of inverters.
See also:  Mains and environment ( 277)
17.3 Undervoltages: Impact on operational performance
The effects of undervoltages (e. g. "3 AC, 400 V" - 10 %) on the available device output voltages and
thus on the motor M-n characteristics is not yet automatically included by the DSD.
17.4 Highly dynamic applications with acceleration times < 50 ms
The rise time of the drive system (results of the reference input variable) is increasingly noticeable
with regard to extremely short accelerations and is taken into consideration.
The rise time depends on the type of inverter that is used, on the motor, and on the control process.
Often simulations of the process are required to check the feasibility of such applications, or data or
experience is available.
• The DSD checks all relevant physical parameters, irrespective of the shortness of the accelera-
tion time.
• The rise time of the inverters used are not checked by the DSD.
• Additionally, the response times of field buses and master controls are to be regarded.
17.5 Feedback systems
Selection criteria like for example accuracy, resolutions, limit frequencies, max. permissible speeds,
are not taken into consideration by the DSD.

Note!
For inverters which are operated on mains with "3 AC, 415 V" < U
mains_rated
≤ "3 AC,
500 V" (e. g. Canada, Taiwan, or operating networks with special voltages):
The dimensioning can also be carried out with the setting "3 AC, 400 V", "3 AC, 415 V" or
"3 AC, 480 V" in the DSD. However, if the voltage deviates, the application must be
checked manually with reduced current values of the inverter in the end!

Note!
Only relevant for highly dynamic applications with acceleration times < 50 ms, e. g. Mo-
tion Control applications for which highly dynamic motion profiles with a low following
error have to be traversed!
See also:
Minimum acceleration and deceleration times ( 263)