Question
Download Solution PDFThe no load ratio of a 50 Hz single-phase transformer is 2000/200 V. The maximum flux in the core is 0.05 Wb. What is the approximate number of primary turns?
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFConcept:
RMS value of induced EMF in whole primary winding (E1) = 4.44fN1Φm
RMS value of induced EMF in whole primary winding (E2) = 4.44fN2Φm
Where N1 = Number of turns in the primary winding
N2 = Number of turns in the secondary winding
Φm = Maximum flux in the core (in Wb)
f = Frequency of the AC supply (in Hz)
This is called the emf equation of the transformer, which shows, the emf/number of turns is the same for both primary and secondary winding.
Calculation:
Given, E1 = 2000 V
E2 = 200 V
Φm = 0.05 Wb
We have E1 = 4.44fN1Φm
Substituting the given values in the above equation we get,
N1 = 180
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