Charging of PV Battery at Constant Voltage Mode by Using Fuzzy Logic Control for Automation Feeding System

Currently, rabbit animal feed is still done manually so its consistency is less guaranteed. Therefore, a tool is designed to feed livestock automatically by using Real-Time Clock as a comparison of time to set the feeding schedule. At each hour of feeding, the servo motor will open the feed container valve. Next, the feed will come down from the shelter and fill the container below it which is equipped with a load cell. When the feed weight has been measured at 100 grams, the servo motor will close the valve again. The system uses solar panels as a power plant equipped with a charge controller and a 6V/12Ah battery which then the battery is used as a supply for a load of a 15W/6V servo motor and a 5W/6V LED lamp as lighting at night to reduce interference from night animals that usually eat rabbit chicks or even eat rabbit pellets as well. However, because the output of solar panels is unstable, buck-boost converters are sought to help the stability of charging the battery at a voltage of 7.2V by using fuzzy controls. From the results of simulation tests using Matlab for charging control with fuzzy methods obtained the result that the output voltage of the converter has reached the setpoint and after being given some interference, the system can maintain the voltage of the output at a value of 7.2V.