gefran AFE200 Series

166 AFE200 • Instruction Manual
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
conguration 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
proles 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-
ed (see table 10.4) in order to guarantee correct pre-load circuit operation.
Key to symbols:
Poutm= Motor output power (continuous operation)
Voutm = Motor voltage rating
vrete = AC mains supply voltage rating
ηm= Typical motor efciency
ηd= Typical drive efciency (0.97)
Pdc= Power requested by the DC-link
Im Motor rated current
Vdclink DC-link rated voltage
650Vcc at 400Vac
750Vcc at 460Vac
930Vcc at 575Vac
1120Vcc at 690Vac
Note! For special applications please contact technohelp@gefran.com.
A1.1 Single-motor calculation based on motor output power
Mains: Vmains = three-phase 400Vca
Motor: Poutm = 132kW
voutm = 400Vca
ηm = 0.95;
Im = 236A
Application: Requires 100% of motor power
Requested overload = 150%
> Calculation of the current required on the DC-link:
Pdc =
Poutm [kW] 132 * 1000
= 220 a
Vdclink * ηm * ηd 650 * 0.95 * 0.97