纳米晶铁心变压器空载损耗的研究

Research on No-load Loss of Nanocrystalline Iron Core Transformer

本文作者首先通过实验实测纳米晶铁心损耗曲线,然后基于纳米晶铁心损耗测试结果进行变损耗系数铁损计算模型的研究,得出纳米晶铁心磁滞损耗、涡流损耗和附加损耗系数随频率变化的修正模型,最后以SCB12-L-800/10干式变压器为例,对比分析了纳米晶铁心变压器空载损耗的解析计算与有限元结果。结果显示,变损耗系数铁损计算模型提高了变压器的铁损的计算精度,并且在相同尺寸下对比纳米晶和23RK100铁心材料下变压器的空载损耗,纳米晶铁心变压器空载损耗仅为硅钢片铁心变压器的9.5%,因此,采用纳米晶料替代传统硅钢片作为变压器铁心可有效降低变压器运行中的空载损耗,有利于提高大功率变压器的效率,降低变压器的体积和重量。

In this paper,the loss curve of nanocrystalline iron core is measured through experiments,and then the calculation model of variable loss coefficient iron loss is studied on basis of the test results of nanocrystalline iron core loss,and the modified model is obtained,which of hysteresis loss,eddy current loss and additional loss coefficients change with frequency.Finally,taking SCB12-L-800/10 dry-type transformer as an example,the analytical calculation and finite element results of no-load loss are compared and analyzed for the nanocrystalline iron core transformer.The results show that the improved loss calculation model increases the calculation accuracy of transformer core loss,and the no-load loss of the transformer with nanocrystalline iron core is compared with that with 23RK100 iron core material under the same size.It indicates the no-load loss of the nanocrystalline iron core transformer is only 9.5%of that of the silicon steel sheet iron core transformer.Therefore,using nanocrystalline material instead of the traditional silicon steel sheet as the transformer core can effectively reduce the no-load loss of the trans-former in operation,which is beneficial to improve the efficiency of high-power transformer and reduce the volume and weight of transformer.