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Lecture 10 360_1 Phase Transformrts

Lecture 10 360_1 Phase Transformrts - EEE 360 Energy...

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10/16/09 360 Chapter 5 Transformers 1 EEE 360 Energy Conversion and Transport George G. Karady & Keith Holbert Chapter 5 Transformers
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10/16/09 360 Chapter 5 Transformers 2 Lecture 10
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10/16/09 360 Chapter 5 Transformers 3 Transformers Figure 5.22 Single phase transformer construction A) Core type B) Shell type
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10/16/09 360 Chapter 5 Transformers 4 5.3.1 Ideal Transformer
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10/16/09 360 Chapter 5 Transformers 5 Transformers 5.3.1 Ideal transformer Winding resistances are zero, no leakage inductance and iron loss Magnetization current generates a flux that induces voltage in both windings I m V p E p E s = V s Φ m 2 ϖ m p p N E Φ = 2 ϖ m s s N E Φ = Fig 5.23 Current, voltages and flux in an unloaded ideal transformer
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10/16/09 360 Chapter 5 Transformers 6 Transformers 5.3.1 Ideal transformer Loaded transformer I m + I p V p E p E s Load V s I s Φ s Φ p Φ m Figure 5.24 Currents and fluxes in a loaded ideal transformer
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10/16/09 360 Chapter 5 Transformers 7 Transformers 5.3.1 Ideal transformer Turn ratio is: The input and output complex powers are equal s p s p E E N N T = = * * I E S S I E s s s p p p = = = p s s p I I E E T = =
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10/16/09
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