Technical Data
Instruction handbook
b maXX
BM4400, BM4600, BM4700
Document No.: 5.12008.07
101
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 curr
ent [%
]
Derating of the output current
DC link voltage [V]
Output curr
ent [%
]
Derating of the output current
DC link voltage [V]
Output curr
ent [%]
Derating of the output current
DC link voltage [V]
Output curr
ent [%]
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 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/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
Output frequency dependent continuous current derating
on page 112, if the statical output frequency is lower than 15 Hz and the frequency remains between 0 and 15 Hz for over
5 seconds.
Summary of Contents for b maxx BM4400
Page 359: ......
