Why is transformer primary 2.69PDC and secondary 3.49PDC in half-wave rectifier?

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#1 21675452 22 Feb 2016 14:57

morteza balvardi morteza balvardi

Anonymous

Post #1
21675452 22 Feb 2016 14:57

according to page 9 of the file at the end of question in a half-wave rectifier primary windings rating is 2.69PDC and secondary winding's rating is 3.49PDC shouldn't they be equal?why does it happen?
look in the table at page 9 of this file :https://cdsweb.cern.ch/record/987551/files/p133.pdf
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#2 21675453 22 Feb 2016 17:33

Peter White Peter White

Anonymous

Post #2
21675453 22 Feb 2016 17:33

When you connect a transformer to a half-wave rectifier, you only remove the signal (energy) during the positive half cycle.

The negative half of the cycle still stays in the transformer and it produces magnetic flux that saturates the core.

When the next cycle arrives, the core is already saturated and instead of passing the energy into the core, it simply heats up the primary winding.
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Why is transformer primary 2.69PDC and secondary 3.49PDC in half-wave rectifier?

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