| 铁芯制作 |
| 添加时间：2018/9/6 15:31:47 浏览次数： |
| 世界上第一台具有闭合磁路铁心的变压器是1855年匈牙利制造出来的。100多年来，变压器在结构上发生了相当发的变化。 The world's first transformer with closed magnetic core was made in Hungary in 1855. Over the past 100 years, considerable changes have taken place in the structure of transformers. 20世纪60年代的贴心，由于采用0.55mm厚的热轧硅钢片板料，因此，只能采用直接缝式结构。铁心柱与铁轭部分都用螺杆加紧，为了防止螺杆与硅钢片叠片之间短接，在螺杆外还要套绝缘管绝缘。由于热轧硅钢片是板料，长度仅为1500mm，所以不单是材料的利用率不高，而且对较大容量的变压器的铁心，还得采用，拼接的方式。这样，加工复杂，而且空载损耗也大。在0.35mm厚的晶粒取向冷轧硅钢片卷料出现以后，铁心的结构、加工工艺与空载损耗等都有较大的改进。使用冷轧硅钢片后，铁心就够从直接缝过渡到半直半斜，最后又由半直半斜过渡到斜接缝。 In the 1960s, because of the adoption of 0.55 mm thick hot-rolled silicon steel sheets, only direct slit structure can be used. The core post and yoke parts are tightened by screw. In order to prevent short connection between the screw and silicon steel laminate, insulating tubes are also arranged outside the screw. As the hot-rolled silicon steel sheet is a sheet metal, the length is only 1500mm, so not only the material utilization rate is not high, but also for the larger capacity of the transformer core, we have to adopt, splicing method. In this way, the process is complex and the loss of no-load is large. After the appearance of 0.35 mm grain oriented cold rolled silicon steel coil, the structure, processing technology and no-load loss of the core have been greatly improved. After cold-rolled silicon steel sheet is used, the core can be transferred from direct seam to semi-straight and semi-oblique seam, and finally from semi-straight and semi-oblique to oblique seam. 大型变压器铁心制造的发展趋势是：五不，即不压毛刺、不退火、不涂漆、不冲孔和不叠上铁轭。当然在工艺方法、专用设备及工装磨具方面，要采取很多措施才行。 The development trend of large transformer core manufacturing is: No burr, no annealing, no paint, no punching and no yoke. Of course, there are many measures to be taken in the process, special equipment and tooling abrasives. |
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