A New Electrical Steel Sheet Developed by Vector Magnetic Characteristic Control

It is assumed that vectors of magnetic flux density B (B-vector) and magnetic field strength H (H-vector) are parallel in the standard magnetic measurement; however, they are not parallel in actual electrical steel sheets. We have proposed the 2-D vector magnetic measurement technique which can measure the B-vector and H-vector that are in different directions. There is a phase difference θ_BH between B-vector and H-vector. The iron loss is calculated by the inner product between B-vector and H-vector. Therefore, the iron loss increases depending on the θ_BH. We controlled the θ_BH by using a laser treatment, and developed a new electrical steel sheet developed by vector magnetic characteristic control, which can reduce the iron loss. This paper presents the details of the measured results from the new electrical steel sheets developed by vector magnetic characteristic control.