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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

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

Delmar's Standard Textbook Of Electricity
Delmar's Standard Textbook Of Electricity
7th Edition
ISBN:9781337900348
Author:Stephen L. Herman
Publisher:Stephen L. Herman
Chapter29: Dc Generators
Section: Chapter Questions
Problem 5RQ: What are interpoles, and what is their purpose?
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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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