Design and application of a novel zero-crossing detector circuit

Abstract

In this study, a novel zero-crossing detector has been designed and implemented that operates as quite steady under the distorted grids due to harmonics. For this aim, a circuit has been designed using UA741, an operational amplifier, which is not affected owing to instant spikes and sags on the signals of current or voltage. Most of the zero-crossing detectors presented in the literature recently generate unsteady output signals usually under the distorted current and voltage signals. The novel zero-crossing detector circuit presented in this study serves a powerful solution for such problems. The detector designed has been tested under various conditions and signals including 19.8% Total harmonic distortion (THD). It has been observed by the test results that the detector operates with optimum performance.