PERANCANGAN SISTEM PROTEKSI TEGANGAN DAN ARUS LEBIH PADA INVERTER MEMANFAATKAN MIKROKONTROLER

Puthut Winarno; emilia roza;

ABSTRACT

Inverter has been developed by many researchers dan electronics designers as the
power electronics converter. The main problem causes the inverter to be damaged
is over voltage and over current. Over voltage is an output voltage of system raises
above the maximum threshold and it can be causes by sudden load rejection on the
inverter. Over current itself occurs because of the very large current parameter
changes caused by short circuits. The problem can be minimized by creating a
protection feature, namely over voltage and over current protection. This protection
system can determine hthe input voltage using a DC voltage censor and inverter
output using the ACS712 current censor and the AC voltage censor. The protection
system performance at the input will work when applying a battery voltage
gradually to the inverter input starting from 10V-14V. Protection at the output will
work by giving a load of incandescent lamps to the inverter in stage until it reaches
the maximum load that can be supplied by the inverter. The average value of the
percentage of errors from measurements between the protection system and the
multimeter measuring instrument is 0.71395%. If the measured current in the
protection system circuit, it will automatically disconnect the load output using a
relay. Then the buzzer will make a sound and there will be information on the LCD
that the inverter is overloaded.

Keywords: ACS712, Inverter, Microcontroller Arduino UNO, Over Current,

Over Voltage, Relay