UM0527
General description
5/66
1 General
description
1.1 Hardware
architecture
1.1.1 General
realization
The UPS evaluation board is built in offline topology with AVR regulation of the mains boost
and buck. The inverter module contains the push-pull DC/DC converter and the DC/AC
output full-bridge generating quasi-sine waveform. The battery charger module is connected
at the output of the UPS and it also has the function of taking over the reactive power which
is present on the inverter during battery operation with reactive - resistive load.
The microcontroller controls all UPS functions. It monitors the mains parameters in order to
ensure the proper level of the output voltage. The microcontroller measurement parameters
are input/output mains voltage and phase, output inverter voltage, battery voltage, output
current and output power. The UPS has a built-in RS232, joint signals and USB interfaces
(USB for RS232 converter).
