Silicon steel is an important soft magnetic alloy. It is widely used and used in large quantities. Silicon steel testing is necessary to ensure that the magnetic properties of silicon steel meet the needs of the product. At present, domestic manufacturers mainly refer to GB/T 13789 "Method for measuring the magnetic properties of electrical steel sheets (with) by single-chip tester method" and GB/T 3655 "Measurement of electrical properties of electrical steel sheets (with belts) with Epstein square circles The method of the two methods for the detection of silicon steel sheets.
The standard stipulates that the sample should be demagnetized before measurement. The measurement should be carried out at ambient temperature (23 ± 5) ° C and relative humidity less than 80%. However, it can be found from the actual operation that the sample demagnetization, the test environment temperature and the power supply voltage are not in conformity during the test, so the measured data is not accurate, and it is also an important reason for the inconsistency between the test data and the data provided by the supplier.