Operating requirements
Instruction handbook b maXX BM4400, BM4600, BM4700
Document No.: 5.12008.07 Baumüller Nürnberg GmbH
54
of 358
3.3
3.3.3 Motor requirements
Devices BM4400, BM4600, BM4700 are designed to operate three-phase current mo-
tors with a terminal motor voltage of 3 x 350 V (typical for servo motors of Baumüller). De-
vices BM4400, BM4600, BM4700 are designed to operate 3 x 400 V (standard
asynchronous motors and customer-specific motors of Baumüller). The motors must be
operated wye-connected. The rated DC link voltage is 540 V
DC
. The DC link voltage may
rise up to 780 V to 800 V in braking operation. The connected motor must be designed
for these DC link voltages.
The DC link voltage remains between 640 V and 760 V continuously (not only in the brak-
ing operation), if the BM4400, BM4600, BM4700 power modules are operated at a volt-
age-controlled DC link (e.g. BM51XX). The connected motor must be able to operate at
these voltages continuously.
The device can be used at lower voltages, also (e.g. 3 x 230 V). However, here, the three-
phase current motors must be designed for the operation with power inverters with up to
800 V DC link voltage, because the brake resistor threshold remains (see ZElectrical data
basic units– from page 63). For these reasons three-phase motors with U
DC,
rated
540 V must be used, only.
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