Method of measuring a monophase voltage

Details Method of measuring a monophase voltage Method of measuring a monophase voltage

2007-02-27

2007-02-27

Tsai, Carol S. W. (Department: 2857)

Data processing: measuring, calibrating, or testing

Measurement system in a specific environment

Electrical signal parameter measurement system

C702S064000, C323S212000, C327S156000, C361S006000

Reexamination Certificate

active

11045478

ABSTRACT:
The present invention is related to a method for measuring the instantaneous value of a monophase AC voltage signal Ve, comprising the steps of:applying said voltage signal Veto a first input of a phase comparing circuit and a reference signal to a second input of said phase comparing circuit,in said phase comparing circuit deriving from the phase difference between said reference signal and said voltage signal Vea correction signal and outputting said correction signal,filtering said correction signal,using said filtered correction signal to adjust said reference signal,when the phase difference between said reference signal and said voltage signal Veis cancelled, determining the instantaneous value of said voltage signal Ve.

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