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1KVA transformer of different frequencies of
50hz,100hz,500hz&1000hz. which one of these transformer has
big size? Give reason
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Answer Posted / hardik (tata chemicals ltd)
As above V/f= flux
1) in case of increase fqr flux is inversely praposnal to
friqunce (vtg = constant) so flux will be reduce so related
to core losses also decrease size of core also we can
decrease..but in this case as per emf equation vtg is also
praposnal to flux so we have to increase wdg turns so size
of all bulk of X'mer become big ,in short it is true size
is inverse praposnal to frequnce but we can not get much
different b'wen as above X.mers
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