Phasor Diagram of No Load Ideal Transformer

AI Thread Summary
In a no load ideal transformer, there is debate over whether V1 is anti-phase with E1 or in phase, with different phasor diagrams presented in various texts. The consensus leans towards V1 being anti-phase with E1, supported by Lenz's law. To better visualize the relationship, it is suggested to redraw the phasor diagram with both coils on the same side of the core. Adjusting the height of the coils and positioning the secondary coil above the primary while maintaining the winding direction is recommended for clarity. This approach aids in accurately understanding the phasor relationships in an ideal transformer scenario.
samieee
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For a no load ideal transformer

vufGi.jpg


V1 is anti phase with E1?

wnvOP.jpg


or

in phase like this?

1EyPP.png
 
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I have seen both types of phasor diagram in different books. But the first one is the accurate answer, I think. Because of Lenze's law.
 
It'll help you visualize the problem if you redraw the top figure to place both coils on same side of the core.

Make both coils less tall and move your secondary over to other side so it's just above the primary,
paying careful attention to preserve which direction the turns are wound.
 

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