machines

Hi padupoi

the iron loss is some sort of losses take place in the core of transformers,,,

hope this helps!!!!

Mr Padupoi,

Please don't get me wrong, i am saying this for your own good.

You need to learn electrical engineering in college, and many questions you have been asking in CR4 really should have been answered by your textbooks and your teachers.

Nevertheless, some good people in CR4 will still try to help you, but i suggest you do not try their patience too much.

Please try this link, and read everything you see : Iron loss

You definitely should learn these things eventually in a formal school setting. This will also give you the mathematics so that you can apply these ideas that you are thinking about. But I"ll give you here a little thought experiment that mimics some of what is happening.

Think of a 2 dimensional grid of cheap little magnetic compasses on a table. These compasses are so cheap that most of them won't point to the north and south pole of the Earth. (The pointers sometimes stick on debris in the compass.) Now when you bring a strong magnet to one end of the grid the magnetic compasses near the magnet spin to align with the much stronger magnetic field, that is those that can now move the debris inside them. Many compass magnets in the next row also align but with the magnetic field being a little weaker, less compasses properly align. Now in the next row even less compass needles align because of both a smaller field from the strong magnet but also non-aligning magnets in the previous row are disrupting the fields. This continues row after row until eventually not even the debris free little compasses change their original pointing direction. This is one form of iron loss.

Now if I haven't lost you, I'll explain another form of iron loss. A transformer only works with changing magnetic fields. So in our thought experiment lets not have so many columns of compasses that they don't align well at the end but most still have debris in the compass body. When the magnetic field changes on one side of our grid all of the compasses try to move to match the change in the field but some get stuck on the debris and some rob some energy by rubbing on the debris. So at the far end some of the magnets immediately line up and some align late. The late ones reduce the maximum field strength that can be obtained at the other end. This is a second form of iron loss.

Lastly, onto the iron loss that involves flux density. A natural idea to still achieve the desired magnetic field strength at the end of the of the grid is to increase the field strength at the beginning of the grid. But if this means that 95% of the compasses at the end must be aligned and then 98% at the second to the last must be aligned. The third from the last must have 101% of the compasses aligned. Despite the pep talk about giving 110%, you cannot have more than 100% of your compasses aligned.

No transformers are ideal.

When you calculate a transformer you will get losses....heat & noise ..etc

Most Transformers are started to be calculated as "Ideal" or "Perfect" but because the system of transformation is not perfect in the real world you then have to recalculate for the fact that the flux density will not quite achieve what you want and that the core is not quite as expected so efficiency goes down so in short Iron is not a perfect part of the equation and the inefficiencies must be taken into account.