Page 117 - Gefran - Inverter system and power supply unit (ADV200 Drive family)

Gefran Spa - Drive & Motion Control Unit • www.gefran.com 117

2. Multi-motor applications > Checking the precharge circuit
Precharge inductors LR3-…-PRC are needed to limit the cur-
3ph 690Vac - 50Hz 3ph 690Vac - 50Hz
rent for charging the condenser bank on the DC-link.
The standard inductors and the precharge circuit integrated in ADV200 - 4
LR3-6-PRC LR3-6-FFE-760 the FFE module are sized in order to charge a total capaci-
Rectifire and Regen Section DC Precharge FFE200-760-6+PRC-MS 20 tance on the DC Link that is greater than the one on a system
AC/DC Regen
where the total power of the ADV200 drives linked to the DC
FFE200-760-6-SL
FFE200-760-6-SL
Link corresponds to the maximum power deliverable by the
1995Adc + ovld 150% @ 930Vdc FFE modules in parallel.
Therefore, these systems do not generally require a check of
correct precharge circuit size. ADV200-DC
Inverter Section ADV200 500KW-6-DC ADV200 355KW-6-DC ADV200 500KW-6-DC ADV200 355KW-6-DC

500KW M 355KW M 500KW M 355KW M
690Vac 690Vac 690Vac 690Vac ADV200 - 6
The application consists of 4 asynchronous motors, each
controlled by a separate inverter.
The inverters are connected to a common DC-link.
The DC-link is powered by an FFE regenerative system.
The application requires 100% of motor and regenerating
power of each asynchronous motor with 150% overload. ADV100

Vmains = three-phase 690[V]
Poutm1 = 500 [KW] @ Voutm1 = 690 [V]
Poutm2 = 355 [KW] @ Voutm2 = 690 [V]
Poutm3 = 500 [KW] @ Voutm3 = 690 [V]
Poutm4 = 355 [KW] @ Voutm4 = 690 [V]
ηm = 0.95 ADV80

> Calculation of the current required on the DC-link:
Vdc = Vmains [V] * 1.35 = 690 * 1.35 = 930 [V]

1000
Pdc [W] = ( Poutm1[kW]+Poutm12[kW]+Poutm13[kW]+Poutm14[kW])* =
(µm* µd) AFE200
1000
Pdc [W] = ( 500+355+500+355 ) * = 1855670 [W]
( 0.95*0.97 )
Pdc [W] 1855670
Idc [A] = = = 1995 [A]
Vdc [V] 930
> Choosing the power supply unit and accessories: FFE200
The chosen FFE200 power supply must be able to deliver cur-
rent ≥ 1995[A] with 150% overload.
Choose the size with the appropriate voltage and current
characteristics from section "7.7 Output Data" on page 121 (see
column DC output current @ 500…690VAC – Heavy Duty)
x 3 FFE200-760-6 SMB200

This power supply consists of 3 modules in parallel. Only one
of them (MS - master) is equipped with the precharge circuit
for the total condenser bank on the DC-link.
no. 1 FFE200-760-6+PRC-MS 20
no. 1 FFE200-760-6-SL
no. 1 FFE200-760-6-SL
Choose the mains inductance (one for each FFE module) and PROGRAM.
the precharge inductance from section "10.2.1. Input choke
(L1 - CA)" on page 148:
no. 3 LR3-6-FFE-760
no. 1 LR3-6-PRC
APPENDIX