FIELD: electric engineering.
SUBSTANCE: method can be used to determine phase angle between sinusoidal signals of same frequency in one-phase circuit of alternating current during diagnostics of workability of electric and electro-mechanical systems and devices. Signals are digitized for same time moments. Sum of current and previous counts of first signal and difference of current and previous counts of second signal for determining reactive quasi-power in time range, equal to signals period. Phase angle between signals is determined on basis of relation of reactive quasi-power to active quasi-power. In comparison to analogical solutions this method does not require filtering of constant component of signals and shift of signals for 90° angle and allows to achieve value of average error of determining phase shift equal to 0,24%.
EFFECT: higher efficiency.
3 dwg, 2 tbl
