Switching frequency adjustment and derating
inverter rated switching frequency
Rated switching frequency
inverter max switching frequency
Maximum switching frequency
Selected switching frequency
Activation of the temperature-dependent switch-
ing frequency reduction
Lower limit for the current / temperature-depend-
ent switching frequency reduction
Selection of the switching frequency group
Actual switching frequency
6.2.20.1 Set switching frequency
Set switching frequency in 0.1 kHz resolution
62.5 µs / 16 kHz, 8 kHz, 4 kHz, 2 kHz
Selection of the switching fre-
quency group
71.4 µs / 14 kHz, 7 kHz, 3.5 kHz, 1.75 kHz
83.3 µs / 12 kHz, 6 kHz, 3 kHz, 1.5 kHz
100 µs / 10 kHz, 5 kHz, 2.5 kHz, 1.25 kHz
The switching frequency can be selected in parameter is10. Only data that are per-
mitted as associated values for the selected switching frequency group are ac-
cepted.
If the switching frequency group 0: 62.5 µs / 16 kHz, 8 kHz, 4 kHz, 2 kHz is param-
eterised in is22, only 2, 4, 8 or 16 kHz can be set for is10.
Due to the used power unit, further restrictions on the possible switching frequen-
cies can become effective.
The indicated values in the manual for the maximum current are valid for the rated
switching frequency (de33).
Parameter de34 indicates the maximum switching frequency which is permissible
for this inverter.
The lower limit of the switching frequency is determined by the used inverter and
the minimum application-specific switching frequency (sinus filter dr53).
These limits have priority to the settings of is10 switching frequency or is16 min.
derating frequency.
The output frequency-dependent short-time current limits reduce at increased
switching frequency (=> Chapter 4.4.2 Overload power components (OL2)).
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