The laminations are to reduce hysteresis and eddy current losses.
2.
Although the hysteresis loss is less than the eddy current loss, it is not negligible.
3.
Eddy current losses are caused by currents induced in the iron due to the alternating flux.
4.
This test only measures the combined iron losses consisting of the hysteresis loss and the eddy current loss.
5.
From this, it can be seen that the thinner the laminations, the lower the eddy current losses.
6.
High flashover problems and the non-laminated magnetic pole-pieces originally designed for DC exhibited excessive eddy current losses.
7.
The transposition equalizes the current flowing in each strand of the conductor, and reduces eddy current losses in the winding itself.
8.
They are available in power ratings ranging from mW to MW . The insulated laminations minimizes eddy current losses in the iron core.
9.
A few of its properties include : low eddy current losses and hysteresis, low permeability changes in high temperatures, high Curie temperature, high DC currents.
10.
In order to reduce the eddy current losses mentioned above, most low frequency power transformers and inductors use laminated cores, made of stacks of thin sheets of silicon steel:
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