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The magnetic anisotropy in grain oriented FeSi alloys (FeSi GO) is very important nowadays, because these steels are usually used for their very good magnetic properties along the rolling direction (RD). In electrical devices the steel magnetic core is subjected to flux lines that are making an angle, different from 0° to the RD and to 2D magnetic flux densities. In the paper there were analyzed samples of a commercial FeSi GO M0H steel industrial grade cut through mechanical punching and electro-erosion technologies. The investigated samples have a thickness of 0.3 mm and an area of 300 mm × 30 mm and were cut at angles θ ranging between 0° and 90° at 15° intervals with respect to the RD. The magnetic characterization was performed with a standardized unidirectional Single Strip Tester (IEC 60404-7) and a frequency analysis from 10 Hz to 100 Hz was done, in order to investigate the energy loss behavior. The loss separation concept was applied, to determine the influence of the cutting technology on the m...

The use of high quality non-oriented electrical steel and of an innovative design for the magnetic cores of the electrical machines are very important, in order to minimize the value of the total energy losses. The energy losses are strongly influenced by the cutting technologies, and the producers of the electrical machines want to minimize the deterioration of the magnetic properties during the manufacturing process. The influence of the cutting density on the magnetic permeability and energy losses was analyzed and one can notice that these magnetic properties are strongly influenced by the cutting technologies. There were tested sheet samples of M400-50A and M700-50A industrial steel grades (thickness of 0.50 mm), cut through mechanical and water jet technologies. All samples have the length equal to 300 mm and the width of 30, 15, 10, 7.5 and 5 mm. The magnetic characterization was performed using a laboratory single strip tester, which can make measurements on samples with an area of 300 × 30 mm2. I...