A PWM-Based Technique to Measure Phase Angle Between AC Voltage and Current

Abstract

This research paper presents a simple and cost-efficient
circuit to measure the phase difference between two
sinusoidal signals. We have proposed a method that
converts the phase-difference into a DC voltage. A
mathematical relationship between the phase difference and
the DC voltage is also developed. Simulations of the
proposed circuit at various phase-angles are presented, the
simulation results agrees with the theoretical analysis.