| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To improve the efficiency of cooling a laminated core by reducing the usage amount of steel plates. <P>SOLUTION: The laminated core (21) is an annular laminated core formed by helically stacking a plurality of core pieces (811) coupled to each other by coupling parts. The cores each have a main core which is provided on the inner circumferential side of the laminated core and has teeth on the inner circumferential side, and a sub-core provided on the outer circumferential side of the main core. The core pieces are coupled to each other by the coupling parts formed on a boundary between the main cores and the sub-cores and the coupling parts are linearly arranged in the stacking direction, and thus, grooves (815) extending in the stacking direction of the laminated core are formed at the parts where the coupling parts are formed on the outer circumferential surface of the laminated core. <P>COPYRIGHT: (C)2011,JPO&INPIT</p> |
