FIELD: physics.
SUBSTANCE: process involves measurement of instantaneous values of current and voltage. Arrays if current and voltage instantaneous values are taken at the same instances of time tj=t1,t2, ..., tN, with sampling increment where T is current/voltage signal period, N is number of measurements in T period. Then, the arrays are saved as running, voltage difference ΔU12(tj) is calculated. Next, digital calculations of voltage difference are saved as running, and inductance voltage UL(tj) is calculated by the formula: and current differential i'1(tj+1) and i'1(tj) is defined. Simultaneously with inductive voltage UL(tj) rated current derivative is calculated: Then, reactor/resistor inductance Li is calculated as a ratio of inductance voltage UL(tj) to the rated current derivative. Next, resistive impedance of reactor/resistor is defined: Further, period average values of resistive impedance and inductance are calculated and adopted as final results.
EFFECT: simpler construction; higher accuracy and descriptiveness.
3 dwg, 3 tbl
Authors
Dates
2008-06-27—Published
2006-12-21—Filed