| 摘要 |
<p>PROBLEM TO BE SOLVED: To reduce the noise of a transformer further by thickening the steel plates of several layers near the surface of an iron core more than the other steel plates of stacked steel plates. SOLUTION: The iron core of a transformer is made by stacking electromagnetic steel plates. At this time, the thickness of the steel plates of several layers near the surface of the iron core is made larger than the other plates 4. For example, the thickness of the steel plates at the greater part of the iron core is made approximately 0.23mm, and for a total of two layers at the outermost surface of the iron core and its inner one layer, steel plates of approximately 0.35mm are used. Hereby, noise reduction can be materialized by the effect of using thinner steel plates as a whole of the iron core, and on the surface of the iron core, rigidity increases by the effect of using thick steel plates, and vibration can be suppressed, and noise reduction can be materialized.</p> |
