Smartbitt SBOL50KTIII-3, Руководство по обслуживанию

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4.4 Charger
The function of charger is to charge and maintain the batteries at fully charged condition. The charger
charges the batteries with a constant current at initial stage. At the same time, the battery voltage keeps
increasing until reaching the constant charge voltage point. Then, the charge current will decrease
accordingly, now it’s in second stage. After one hour of constant voltage charging, the charge voltage will
change to floating charge voltage, in general, the charger will control the output voltage at a constant
level (13.65V±1% per battery) to optimize battery recharge time and prolong the lifetime of batteries
without overcharging.
As shown in the Figure 4.4, the battery charger applies buck converter.
Figure 4.4 Topology of the charger
4.5 EMI Board
Input EMI board is connected between utility and the input of rectifier. Output EMI board is connected
between the output of inverter and output terminal block.
Figure 4.5 Topology of the input/output EMI
+BUS
N
-BUS
BAT+
N
BAT-
C1
C2
C3
C4
Q1
Q2
D1
D2
L1
L2
D3
D4
Cx
Cx
Cx
Cy Cy
Cy
Cy
Cy
Cy
Cy
Cy
Cy
Cy
Cy
I P/ R
I P/ S
I P/ T
I P/ N
OP/ R
OP/ S
OP/ T
OP/ N
L1
F1
F2
F3