Phasor Diagram of No Load Ideal Transformer

In summary, the phasor diagram of a no load ideal transformer is a graphical representation of the voltage and current in both the primary and secondary windings. It is important in understanding the internal behavior and characteristics of the transformer. The diagram is different from that of a loaded transformer, as the secondary current is zero and the primary and secondary currents are in phase. The phasor diagram also provides information about the voltage and current ratio, phase relationship, power factor, efficiency, and regulation of the transformer. In practical applications, it is useful for designing and analyzing transformer performance.
  • #1
samieee
67
0
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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  • #2
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.
 
  • #3
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.
 

1. What is a phasor diagram of a no load ideal transformer?

The phasor diagram of a no load ideal transformer is a graphical representation of the voltage and current in both the primary and secondary windings of the transformer. It shows the phase relationship between the primary and secondary voltages and currents, as well as the magnitude of these quantities.

2. Why is the no load condition important in an ideal transformer?

The no load condition is important in an ideal transformer because it allows us to analyze the transformer's behavior without the influence of any load on its secondary side. This helps in understanding the transformer's internal behavior and characteristics.

3. How is the phasor diagram of a no load ideal transformer different from that of a loaded transformer?

In a no load ideal transformer, the secondary current is zero, and the primary current is only due to the magnetizing current. This results in the primary and secondary currents being in phase with each other, and the voltage drop across the primary and secondary windings being negligible. On the other hand, in a loaded transformer, the secondary current is not zero, and the primary and secondary currents are out of phase due to the load. This results in a different phasor diagram with a different phase relationship between the primary and secondary voltages and currents.

4. What does the phasor diagram tell us about the no load ideal transformer?

The phasor diagram of a no load ideal transformer tells us about the transformer's internal behavior, such as the voltage and current ratio, phase relationship between the primary and secondary quantities, and the power factor. It also helps in determining the efficiency and regulation of the transformer.

5. How is the phasor diagram of a no load ideal transformer useful in practical applications?

The phasor diagram of a no load ideal transformer is useful in practical applications as it helps in understanding the transformer's behavior and characteristics. It also helps in designing and analyzing the performance of transformers, such as determining the winding turns ratio and selecting the appropriate transformer for a specific application.

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