REDUKSI RIPPLE DAN EVALUASI TEGANGAN PADA PENYEARAH SETENGAH GELOMBANG TIGA FASA BERBASIS KOMPONEN PASIF

Abstract

The three-phase half-wave rectifier circuit employs diodes as passive rectifying components to convert a three-phase sinusoidal input into a half-wave output, where only the positive portions of each phase are conducted. When combined with an inductive element, the circuit allows current to continue flowing even after the load voltage drops to zero, since the inductor stores and releases energy. Experimental results show that the output DC voltage is approximately equal to the peak voltage of the transformer, reduced by about 0.7 V due to the forward voltage drop of the silicon diode. Furthermore, the presence of a capacitor in the RC load significantly reduces the ripple voltage, producing a smoother DC output. Measurements also revealed that the Avo-Meter displays the effective (rms) voltage, while the oscilloscope indicates the peak value of the waveform. During the measurement process, the internal resistance of the measuring instruments slightly influenced the results due to continuous current flow through the circuit. Overall, the study confirms that increasing the capacitance value effectively minimizes ripple, thereby improving the quality of the rectified DC output.