LAMINATED SPIRAL CORE, DYNAMO-ELECTRIC-MACHINE ROTOR PROVIDED THEREWITH, AND DYNAMO-ELECTRIC MACHINE

摘要

A laminated spiral core includes core units and a plurality of swage portions. The core units form a rotor core. The core units have permanent-magnet attachment portions in which permanent magnets are to be disposed. Each of the core units has an arc shape. The plurality of swage portions connect the core units by swage-joining when the core units are spirally stacked in a predetermined number of layers. The plurality of swage portions are provided in the core units in a wave-shape to face the permanent-magnet attachment portions and provided at positions where an influence of magnetic flux paths in a rotor is minimal.