铁氧体磁芯高频损耗的有效值法测量

The Measurement of the Power Loss ofFerrite Cores at High Frequency with RMS Method

磁芯损耗的测试方法有很多 ,如谐振法、电桥法、功率表法等 ,但是这些测试方法均用在较低频率。随着功率铁氧体磁芯的使用频率越来越高 ,进一步研究高频下的磁芯损耗测量方法成为必要。阐述了国际电工委员会 (IEC)发布的有效值法的原理 ,并用组成的测试系统进行了一些测试 ,最后对测试所得的数据进行了分析 ,结果表明磁芯损耗曲线与经验公式 P=KBp-pn 吻合。

As more and more ferrite cores have been applied at high frequency field, and the traditional methods used to measure the power loss of ferrite cores do not work well, it is necessary to study other ones. In this paper the RMS measuring method recommended by IEC has been analyzed. On this basis, a measuring system has been designed. Then the data gained under the system have been analyzed, and the results manifest that the curves of ferrite cores' power loss at high frequency agree with the experial equation .