Integrating analog-digital zero current sensor

Abstract

The new principle of constructing analog-digital zero current sensor (ZCS) on the basis of integrating scanning converter meant for control systems of reversed thyristor converters with separate control is considered. The structure chart and its timing diagrams of signals are given. It is mentioned that the application of the integrating sweep converter allows to provide high noise stability and digital algorithm of data processing allows to provide higher accuracy of operation.

Keywords: zero current sensor, scanning converter, thyristor converter, frequencypulse-width modulation, integrator, relay element, analog-digital conversion.