METHOD FOR DETERMINING FASTENING FORCE OF STACKED CORE AND METHOD FOR MANUFACTURING STACKED CORE

摘要

A stacked core is formed from an electrical steel sheet. The stacked core is vibrated by means of a mechanical excitation force in the range from 1 N to 1,000 N depending on different fastening forces, the vibration level of at least one point of the stacked core is measured, and the relationship between the vibration level and the fastening force is obtained on the basis of the result of the measurement of the vibration level. It is therefore possible to accurately determine a fastening force that reduces noise by generating appropriate sliding friction between the stacked layers of the stacked core after the stacked core is excited.