Electricial Installation
62
Operating instructions SVCD(S)
123456278
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419A58
Elektrotechnische Anlagen GmbH
1
4.5
Application example
Figure 4.5.1
Within greater plants several power feedback units may be coupled. Figure 4.5.1 shows
an example of a crane system with some possible combinations.
The operation of several inverters at one common DC-bus allows reducing the amount
of power feedback units. On the other hand several power feedback units may be cou-
pled to transmit more power. It's also possible to drive several motors at one inverter, as
they react, seen from the DC-bus (and that's, what the power feedback unit sees), like
one big motor.
To proportion such a plant it is important to look at the worst case. The maximum feed-
back power of the power feedback unit has to be higher as or, at a minimum, equal to
the total amount of the braking power of the connected motors.
FC
FC
FC
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