����� �Hayato Ando (Stu. Mem.), Yuichiro Kai (Mem.), Masato Enokizono (Mem.)This paper presents vector magnetic characteristic analysis of PM motor by using complex E&S modeling taking account of stress effect. It is well known that the magnetic properties of the electrical steel sheets are generally deteriorated due to influence of mechanical stress. However we can reduce iron losses under limited stress conditions in past researches. A low iron losses PM motor designed by taking account of stress effect is presented.

This paper presents measured results of the two-dimensional vector magnetic properties in the electrical steel sheets under rotational flux conditions. In the vector magnetic characteristics under rotating magnetic flux conditions, the ratio of alternating hysteresis and rotating hysteresis differs depending on the change in the axial ratio under rotating magnetic flux conditions. This axis rate change from vector magnetic hysteresis loop characteristics are analyzed and clarified details.