Abstract:
This study aims to design and build a free energy device as a source of
electricity to support the performance of the alternator in the vehicle's electrical
system. The methods used include designing the drive system, regulating
synchronous speed, and analyzing the excitation voltage and current. The test
results show that the alternator works optimally at a synchronous speed of 4000
RPM, which is needed to ensure stable output power. The induced voltage
generated before the rectification process reaches 1539 V (star configuration), and
after going through the rectifier, the output voltage becomes 14 V, according to the
needs of the vehicle's electrical system. An excitation current of 7 A is needed to
drive the rotor, with an electromagnetic torque of 2.44 Nm which is sufficient to
maintain power stability without giving excessive mechanical load to the engine. In
conclusion, the designed free energy system is able to provide stable electrical
power and support the performance of the alternator continuously, making it a
potential alternative to improve the efficiency of the vehicle's electrical system.
