Technical Data
Instruction handbook b maXX BM5500, BM5600, BM5700
Document No.: 5.13008.10
63
of 314
3
10)
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 between o
utput 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 voltages 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.
11)
There are other peak current limits if BM4414 is in braking operation, only.
The following peak currents are possible: 15 A at 4 kHz switching frequency and
10 A at 8 kHz switching frequency
NOTE!
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