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 electronic 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 are used to determine reactive quasi-power in time range, equal to signals period. Actual values of signals are determined. Phase angle between signals is determined from relation of reactive quasi-power to result of multiplication of actual values of signals.
EFFECT: no need for filtering constant component of signals and shifting signals for 90 degrees angle, also it is possible to achieve average error of phase shift calculation equal to 0,77%.
3 dwg, 2 tbl
