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Comments on What are these transformer graphs about?

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What are these transformer graphs about?

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This picture describes the behaviour of a single phase transform under resistive,inductive and capacitive loads(from left to right)

How what exactly is $V_{1}$ ?Is it the voltage at the primary side?And what are $I^{'}_{2}$ , $I_{1}$ and $I_{0}$? Is $I^{'}_{2}$ the current at the secondary side?If $I^{'}_{2}$ is the current at the secondary side then there is no way $V_{1}$ is the voltage at the primary side because in the first out of the 3 pictures(from left to right) there is a 0 degrees phase difference between $V_{1}$ and $I^{'}_{2}$ and by taking the transformer's equivalent circuit:

and ignoring the branch related to the core of transformer,the transformer itself has a inductive behaviour due to the inductance of the primary and secondary windings so $V_{1}$ cannot be the primary voltage simultaneously with $I^{'}_{2}$ being the secondary current.

So what are the quantities of these graphs?

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Andy aka‭ wrote 11 months ago · edited 11 months ago

Your upper picture of the phasors shows $I_2$ and $I'_2$ <-- they don't appear in the equivalent circuit shown below. Consistency is needed to give an answer. Neither do the loads (if I read the phasor diagrams correctly), match truly capacitive or truly inductive loads. The resistive load scenario appears to match. The capacitive-orientated diagram also seems to be for the inductive-orientated diagram

You need to provide clarity. A bit of a mess really.

Volpina‭ wrote 11 months ago

The image of the equivalent circuit of a transformer and the diagrams of the operation of a transformer under different loads dont come from the same source so the labels dont match. A inductive or a capacitive load isnt a pure inductor or a pure capacitor its a combination of a series resistance with a inductor or a capacitor.