L, R1 a*R2 a²L2 L, +a²L½ _Rq+a°R2 a=NIN2 a=N,IN2 Lm R. Lm: R_ Ideal (a) All elements referred to the primary side (b) Approximate equivalent circuit that is sometimes more convenient to use than that of part (a) Figure 14.29

Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
Chapter1: Introduction
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A certain 60-Hz, 20-kVA, 8000/240 V-rms transformer is operated with a short-circuited secondary and reduced primary voltage. It is found that, for an applied primary voltage of 500 V rms, the primary current is 2.5 A rms (i.e., this is the rated primary current) and the transformer absorbs 270 W. Consider the equivalent circuit of Figure 14.29(b) on page 729. Under the stated conditions, the current and power for and can be neglected. Explain why. Determine the values of the total leakage inductance referred to the primary (L1+a2L2) and the total resistance referred to the primary (R1+a2R2).

L,
R1
a*R2
a²L2
L, +a²L½ _Rq+a°R2
a=NIN2
a=N,IN2
Lm
R.
Lm:
R_
Ideal
(a) All elements referred to the primary side
(b) Approximate equivalent circuit that is sometimes more
convenient to use than that of part (a)
Figure 14.29
Transcribed Image Text:L, R1 a*R2 a²L2 L, +a²L½ _Rq+a°R2 a=NIN2 a=N,IN2 Lm R. Lm: R_ Ideal (a) All elements referred to the primary side (b) Approximate equivalent circuit that is sometimes more convenient to use than that of part (a) Figure 14.29
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