Baumuller b maxx BM4400, Instruction Handbook Manual

Page: 226 / 360

Power on switching frequency / DC link charging
Instruction handbook b maXX BM4400, BM4600, BM4700
Document No.: 5.12008.07 Baumüller Nürnberg GmbH
226
of 358
8.3
8.3.3 Power supply switch-on frequency BM443X generation 2, BM4X4X to BM4X7X
h up to

BM 4 4 4 X - X X X - XXXXX[Ryy] - [XXX] - XX[xx] - 4005 -X-XXX-XXX

BM 4 4 5 X - X X X - XXXXX[Ryy] - [XXX] - XX[xx] - 5003 -X-XXX-XXX

BM 4 4 6 X - X X X - XXXXX[Ryy] - [XXX] - XX[xx] - 6003 -X-XXX-XXX

BM 4 4 7 X - X X X - XXXXX[Ryy]

BM 4 6 4 X - X X X - XXXXX[Ryy]

BM 4 6 5 X - X X X - XXXXX[Ryy]

BM 4 6 6 X - X X X - XXXXX[Ryy]

BM 4 7 X X - X X X - XXXXX[Ryy]
Above shown character string shows the type code on the type plate. The bold group of
four strings (fifth segment of type code) determines the power unit’s technical status. All
devices with type to
4005- , -5003- and -6003- use the before mentioned time-controlled
charge procedure and behave similar to BM443X, but the charging time of the DC link is
approximately 1 second.
Instead of the technical status shown directly on the type plate, the version of the power
unit firmware can be shown in ProDrive (page power unit, top left, device data: firmware
version). Up to version 03.06
Z Power supply switch-on frequency BM443X (Generation
1) – from page 225.
h from

BM 4 4 3 X - X X X - XXXXX[Ryy] - [XXX] - XX[xx] - 3006 -X-XXX-XXX

BM 4 4 4 X - X X X - XXXXX[Ryy] - [XXX] - XX[xx] - 4006 -X-XXX-XXX

BM 4 4 5 X - X X X - XXXXX[Ryy] - [XXX] - XX[xx] - 5004 -X-XXX-XXX

BM 4 4 6 X - X X X - XXXXX[Ryy] - [XXX] - XX[xx] - 6004 -X-XXX-XXX

BM 4 4 7 X - X X X - XXXXX[Ryy]

BM 4 6 3 2 - X X X - XXXXX[Ryy]

BM 4 6 4 X - X X X - XXXXX[Ryy]

BM 4 6 5 X - X X X - XXXXX[Ryy]

BM 4 6 6 X - X X X - XXXXX[Ryy]

BM 4 7 X X - X X X - XXXXX[Ryy]
For technical status higher than the above mentioned, an alternative procedure is imple-
mented.
This version of the power unit firmware can be shown in ProDrive. It is 04.00 and higher.
The devices use a rectifier with 3 diodes and 3 thyristors (B6HK circuit). The circuit mea-
sures the voltage on the phase conductor and the DC link. The corresponding thyristor is
fired, if the phase conductor voltage minus DC link voltage is lower than a fixed threshold.
Thereby an almost constant voltage time area is applied to the series connection of phase
conductor and DC link capacitor. The charge of the DC capacitor is done with current
pulses of approx. same level. This level depends on the inductance of the commutation
choke, the impedance of the power supply and the power supply voltage. The thyristors
are fired, if the DC link is charged to 50 V difference between peak power supply voltage
and DC link voltage and there is a potential drop in blocking direction. The thyristor shows
a behavior like a diode.