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Appendix 1 - Design
AFE200 product are normally used in applications that require the re-introduction
of power into the mains. They can also be used when regeneration is not required,
to achieve unitary cos phi or low total harmonic distortion values (which standard
inverters do not guarantee, even with a DC or line choke).
This section provides some examples of design, from the simplest, single-motor
configuration to more complex ones.
As a general rule, the AFE2000 should be at least the same size as the drive,
which is usually an ADV200-DC.
In certain cases the size can be chosen according to the work cycles and load
profiles of each drive, in both motor or generator mode.
Another calculation to be performed is the sum of the loads connected to the DC-
LINK, obtained from the total of the parallel connections.
The sum of the loads of each drive must be less than the maximum value speci-
fied (see table 10.4) in order to guarantee correct pre-load circuit operation.
Precharge kit must be selected according to AFE size and the capacity connect-
ed to the DC-Link (see chapter "5.5 Precharge Kit" on page 48).
LCL Filter must be selected considering the use of the AFE: Heavy Duty or Low
Duty overload (see chapter "5.6 LCL Filters" on page 51).
Key to symbols:
P
V
V
η
η
P
Im
Vdclink
Note!
For special applications please contact technohelp@gefran.com.
A1.1 Single-motor calculation based on motor output power
Mains:
Motor:
Application:
188
= Motor output power (continuous operation)
outm
= Motor voltage rating
outm
= AC mains supply voltage rating
mains
= Typical motor efficiency
m
= Typical drive efficiency (0.97)
d
= Power requested by the DC-link
dc
Motor rated current
DC-link rated voltage
650Vcc at 400Vac
750Vcc at 460Vac
930Vcc at 575Vac
1120Vcc at 690Vac
Vmains = three-phase 400Vca
P
= 132kW
outm
v
= 400Vca
outm
η
= 0.95;
m
I
= 236A
m
Requires 100% of motor power
Requested overload = 150%
AFE200 • Instruction Manual
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