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Figure 2 – Block diagram of the UPS
4.4 System Description
4.4.1 Rectifier
It converts the three-phase voltage of the AC mains into continuous DC
voltage.
The control electronics uses the latest generation controller that allows to
reduce the distortion of the current absorbed by mains (THDi). This ensures
that the rectifier does not distort the supply mains, with regard to the other
loads. It also avoids cable overheating due to the harmonics circulation.
The rectifier is so sized as to supply the inverter at full load and the battery
at the maximum charging current.
4.4.2 Invertor
It converts the direct voltage coming from the DC battery into alternating
AC voltage stabilized in amplitude and frequency.
Thanks to the control electronics of latest generation, it generates an
excellent output sine-wave.
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