Physics Help Forum How to show laminations minimizes eddy current?

 Jun 8th 2015, 08:55 AM #1 Member     Join Date: Jun 2014 Posts: 67 How to show laminations minimizes eddy current? In transformer, lamination is an effective method to minimize eddy current and thus energy loss. I just wonder how can we show that the energy loss due to eddy current in those laminates is added up to be less than that without lamination (suppose the total cross sectional areas are the same)?
 Jun 8th 2015, 12:21 PM #2 Senior Member   Join Date: Apr 2015 Location: Somerset, England Posts: 1,028 It is a question of thinking in three dimensions and about area occupied by loops, since the area determines the induced eddy current. Have you any thoughts or proposals?
Jun 9th 2015, 12:56 AM   #3
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Posts: 67
 Originally Posted by studiot It is a question of thinking in three dimensions and about area occupied by loops, since the area determines the induced eddy current. Have you any thoughts or proposals?
What I concern is, if the area is divided into say, 10 equal parts. How to show the the total energy loss of these 10 small sections turns out to be less than that without lamination?

 Feb 4th 2016, 12:48 AM #4 Junior Member   Join Date: Jan 2016 Location: Spain Posts: 8 Eddy current loss, occurring on account of eddy currents produced due to induced voltages in laminations in response to an alternating flux, is proportional to the square of thickness of laminations, square of frequency and square of effective (r.m.s.) value of flux density. You should consider that the smaller the cross section, the more difficult for the Eddy current loop to circulate in the core material. Attached Thumbnails   Last edited by xareu; Feb 4th 2016 at 12:52 AM.

 Tags current, eddy, eddy current, laminations, minimizes, show, transformer

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