Alternating Current Machinery a Practical Treatise On Alternating Current Princ
Alternating Current Machinery a Practical Treatise On Alternating Current Princ
Ill American School Chicago
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302), as shown in Fig. 303. That is, E 2 (effective value) is represented by the diameter of the polygon (circle) in Fig. 303. Consider now the three-ring converter. Suppose its three rings are connected as shown by the numbers 1, 2, and 3 in Fig. 301. Then the electromotive force E's, between rings 1 and 2 is the vector sum of the electromotive forces a, 6, c, d, e, and /, as shown in Fig. 303; the electromotive force E"a, between rings 2 and 3, is the vector sum of the electromotive forces g,... h, i, j, k, and /, as shown in Fig. 303 and the electromotive force E r "a, between rings 3 and 1, is the vector sum of the electromotive forces m, n, o, p, q, and r, as shown in Fig. 303. Therefore, the effective value of the electromotive force E% between the two rings of a two-ring converter, being represented by the diameter of a circle, the effective value of the electromotive force Ea t between any two rings of a three-ring converter is repre- sented by a 120-degree chord of the same circle.
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