Abstract: At present, more and more attention has been paid on the uniformity of transverse iron loss distribution of oriented electrical steels. The magnetic performance testing methods are mainly divided into static and dynamic testing(online detection). Now, there is no relevant testing method for dynamic testing of electrical iron loss performance in China. In this paper, we studied on the method and reliability of dynamic measurement of iron loss transverse distribution of electrical steel strip in online measurement by the method of using a small single permeameter to measure iron loss in different regions of large single steel sheet sample on the basis of GB/T 13789—2008. The results showed that there is good correlation and consistency between the iron loss distribution in different areas measured by permeameter close to the sample and permeameter separating 10 mm from the sample.

Key words: electrical steel；large single steel sheet sample；iron loss；dynamic test, small single permeameter