Yiyuan Electric Co., Ltd www.yiyen.com
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2.5 Electrical Performance
2.5.1 Invert
Topology
The APC inverter/charger is built according to the following topology.
Invert: Full Bridge Topology.
Charge: Isolate Boost Topology
The peak efficiency of APC series is 88%.
Overload Capacity
The APC series inverters have different overload capacities, making it ideal to handle demanding loads.
1 For 110%<Load<125%(±10%), no audible alarm in 14 minutes, beeps 0.5s every 1s in the 15th minute,
and Fault(Turn off) after the 15th minute.
2 For 125%<Load<150%(±10%), beeps 0.5s every 1s and Fault(Turn off) after the 1 minute.
3 For 300%
≧
Load>150%(±10%), beeps 0.5s every 1s and Fault(Turn off) after 20s.
2.5.2 AC Charger
APC Series is equipped with an active multistage battery charger.
The APC series inverter is with a strong charging current of 90Amp(for 3KW,12V), and the max charge
current can be adjusted from 0%-100% via a liner switch at the right of the battery type selector. The liner
switch can effectively reduce the max charging current to 20% of its peak.
Choosing “0” in the battery type selector will disable charging function.
There are mainly 3 stages:
Bulk Charging:
This is the initial stage of charging. While Bulk Charging, the charger supplies the battery
with controlled constant current. The charger will remain in Bulk charge until the Absorption charge voltage
(determined by the Battery Type selection) is achieved.
Software timer will measure the time from A/C start until the battery charger reaches 0.3V below the boost
voltage, then take this time asT0 and T0×10 = T1.
Absorb Charging:
This is the second charging stage and begins after the absorb voltage has been reached.
Absorb Charging provides the batteries with a constant voltage and reduces the DC charging current in order
to maintain the absorb voltage setting.
In this period, the inverter will start a T1 timer; the charger will keep the boost voltage in Boost CV mode
until the T1 timer has run out. Then drop the voltage down to the float voltage. The timer has a minimum
time of 1 hour and a maximum time of 12 hours.
Float Charging:
The third charging stage occurs at the end of the Absorb Charging time. While Float
charging, the charge voltage is reduced to the fl oat charge voltage (determined by the Battery Type