Electrical data basic units
Instruction handbook b maXX BM5500, BM5600, BM5700
Document No.: 5.13008.10 Baumüller Nürnberg GmbH
86
of 314
3.4
14)
The range of the output frequency is based on a stationary operation in the linear range of the PWM, i. e. without overmodulation.
The quality of the generated output voltages depends on the ratio betw
een output frequency and current controller frequency f
I-R
( f
I-R
= 1/cycle time current controller).
The maximum output frequency f
max
, generated with high quality, is calculated as follows:
f
max
f
I-R
K
pf
--------
, typical K
Pf
18=
Furthermore the controller sets an upper limit for the output frequency of 599 Hz (please contact the responsible Baumüller sales de-
partment, keyword: export restriction).
The range of the output frequency is defined as follows:
PWM frequency Current controller cycle time Range of the output frequency
2 kHz 250 µs 0 - 225 Hz
4 kHz 125 µs 0 - 450 Hz
8 kHz 62.5 µs 0 - 599 Hz (900 Hz
*)
)
*)
900 Hz could be generated by the controller
The device is able to generate output voltage
s with frequencies between f
max
and 599 Hz and the controller allows that, however the
quality of this voltages cannot be guaranteed.
Typical the devices are marked with the max output frequency at 4 kHz switching frequency: 0 ... 450 kHz.
15)
The continuously permitted output current must be reduced complying with ZOutput frequency dependent continuous current derating
BM5XXX– on pa
ge 119 if the statical output frequency is lower than 15 Hz and the frequency remains between 0 and 15 Hz for more
than 5 seconds.
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