“…Variables a , b , and c indicate the half of the width, half of the length and thickness of the iron core, respectively. When the skin depth is much smaller than a and b , and the magnetic flux flows parallel to the direction of length c , the eddy‐current loss of the iron core per weight P ec is expressed [
14] by the following equation:
where D is the iron core density and B m is the maximum flux density.…”