Technical Data
Instruction handbook b maXX BM4400, BM4600, BM4700
Document No.: 5.12008.07
101
of 358
3
7)
At rated power supply voltage the unit supplies rated / maximum output currents. With input voltages above the rated power supply
voltage the output currents must be reduced at constant output power.
Output current [%]
Derating of the output current
DC link voltage [V]
Output current [%]
Derating of the output current
DC link voltage [V]
Output current [%]
Derating of the output current
DC link voltage [V]
Output current [%]
Derating of the output current
DC link voltage [V]
Figure 47: Derating the output current BM444X power modules
8)
For cooling versions S and A, only.
9)
Preliminary information: Available at devices with type code BM44XX-XXX-XX3XX-03-4-yyy, whereat yyy > 024 and the controller
firmware version must be 3.09 or higher.
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/8 kHz 125 µs 0 - 450 Hz
The controller allows the device to generate output voltages with frequencies between f
max
and 599 Hz. However the quality of this volt-
ages cannot be guaranteed.
Typical the devices are marked with the max output frequency at 4 kHz switching frequency: 0 ... 450 kHz.
11)
At a hardware status of < 4006 or if UL508C is complied with: at maximum 4 A
12)
The continuously permitted output current must be reduced complying with ZOutput frequency dependent continuous current derating
BM4XXX– on p
age 112, if the statical output frequency is lower than 15 Hz and the frequency remains between 0 and 15 Hz for over
5 seconds.
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