Theory and calculation of alternating current phenomena . 4{J4> +/l80_,^), That is, im is the average value of / for an angle , and itssupplementary angle 180 — , ih the average value of / for anangle 4> and its negative angle — 4>. EFFECTIVE RESISTANCE AxND REACTANCE 119 94. The distortion of the wave of magnetizing current is aslarge as shown here only in an iron-closed magnetic circuitexpending power by hysteresis only, as in an ironclad trans-former on open secondary circuit. As soon as the circuit ex-pends power in any other way, as in resistance or by mutual. Fig. 83.—Distortion
Theory and calculation of alternating current phenomena . 4{J4> +/l80_,^), That is, im is the average value of / for an angle , and itssupplementary angle 180 — , ih the average value of / for anangle 4> and its negative angle — 4>. EFFECTIVE RESISTANCE AxND REACTANCE 119 94. The distortion of the wave of magnetizing current is aslarge as shown here only in an iron-closed magnetic circuitexpending power by hysteresis only, as in an ironclad trans-former on open secondary circuit. As soon as the circuit ex-pends power in any other way, as in resistance or by mutual. Fig. 83.—Distortion of current wave bj hysteresis. inductance, or if an air-gap is introduced in the magnetic circuit,the distortion of the current wave rapidly decreases and practi-cally disappears, and the current becomes more is, while the distorting component remains the same, thesinusoidal component of the current greatly increases, and ob- 120 ALTERNATING-CURRENT PHENOMENA sciires the distortion. For example, in Fig. 83, two waves areshown corresponding in magnetization to the last curve ofFig. 80, as the one most distorted. The first curve in Fig. 83is the current wave of a transformer at load. At higherloads the distortion is correspondingly still less, except where themagnetic flux of self-induction, that is, flux passing betweenprimary and secondary and increasing in proportion to the load,is so large as to reach saturation, in which case a distortionappears again and increases with increasing load. The secondcurve of Fig. 83 is the exciting current of
Size: 1432px × 1744px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, booksubjectelectriccurrentsalte
