Laminated core manufacturing method for rotating electrical machine, laminated core manufacturing device, and rotating electrical machine

Provided are a laminated core manufacturing method for a rotating electrical machine, a laminated core manufacturing device, and a rotating electrical machine, capable of improving motor efficiency and suppressing cogging torque or torque pulses. The method comprises steps that before a step of punching a plate-shaped rotor core element (21) from a rolled strip-shaped electromagnetic steel plate (4) by a punching mechanism (51,...), the plate-shaped rotor core element (21) is punched in a second region (42) of the strip-shaped electromagnetic steel plate (4) that is further inward than a firstregion (41) of the punched plate-shaped rotor core element. The plurality of plate-shaped stator core elements (11) are punched by a punching step so that the tooth portions (11T) extend in the samedirection in the radial direction of the rotating electrical machine. 提供一种旋转电机的层叠铁芯制造方法、层叠铁芯制造装置以及旋转电机，能实现马达效率的提高，以及能抑制齿槽转矩或转矩脉冲。在旋转电机的层叠铁芯制造方法中，在通过冲压机构(51、...)从由轧制形成的带状电磁钢板(4)中冲裁板状转子芯部元件(21)的工序之前，在带状电磁钢板(4)的比冲裁板状转子芯部元件的第一区域(4