| 摘要 |
PROBLEM TO BE SOLVED: To provide an armature core which is able to secure a required mechanical strength and reduce leakage of magnetic flux by the magnetic resistance between adjacent 18a made higher. SOLUTION: The armature core is divided into an inner core 18 and an outer core 19. The inner core 18 includes a plurality of teeth 18a radially arranged and links the inner circumferential ends of respective teeth 18a are linked in an annular form. The outer core 19 has a plurality of magnetic poles 19a provided corresponding to respective teeth 18a and a plurality of links 19b which connect the magnetic poles 19a adjoined each other in a circumferential direction. In a core sheet used in the outer core 19, the wall thickness of the links 19b is arranged to be thinner than that of the magnetic poles 19a. With this construction, as the cross sectional area of the links 19b of the outer core 19 can be made smaller, the magnetic resistance of the links 19b becomes larger and the magnetic flux amount leaked between the adjacent teeth 18a via the links 19b can be made smaller.
|
