Effect of residual stress on magnetic properties of motor cores

摘要: The magnetic properties of electrical steel sheet deteriorates due to residual stress, which occurs during the manufacturing process. Therefore, it is important know relationship between property and stress in order utilize sheets effectively. This paper presents effect on motor cores a rotating machine. First, local distribution core measured using an X-ray measurement system. Next, for different distributions are single tester. Based these results, maximum permeability power loss differed depending sample, each had stress. In addition, we attempt measure inductance easily evaluate property. difference sample was obtained based excitation voltage frequency LCR meter. It very useful determinine