| 摘要 |
An alternator of high quality and high performance includes a rotor, a stator core arranged so as to surround the rotor and having a plurality of axially extending slots arranged at a predetermined circumferential pitch, and a stator having a stator winding fitted into the slots. The stator core includes element iron cores of a hexahedral shape which are deformed to curve, with their adjacent end faces being abutted and bonded to each other, each of the element iron cores being composed of thin steel plates laminated and integrated with one another, with concave and convex portions formed on the thin steel plates being fitting with each other. The concave and convex portions are formed on a borderline between a compressive region of the stator core at an inner diameter side thereof and a tensile region of the stator core at an outer diameter side thereof. |
| 主权项 |
1. A rotating electrical machine comprising:
a rotor; a stator core that is arranged so as to surround said rotor and has a plurality of axially extending slots arranged at a predetermined pitch in a circumferential direction; and a stator having a stator winding fitted into said slots; wherein said stator core comprises element iron cores of a hexahedral shape which are deformed to curve, with their adjacent end faces being abutted against each other and bonded to each other, each of said element iron cores being composed of individual thin steel plates laminated and integrated with one another, with concave and convex portions formed on said individual thin steel plates being placed into fitting engagement with each other; and said concave and convex portions are formed on each individual steel plate on a borderline between a compressive region of said stator core at an inner diameter side thereof subjected to compressive stress occurring upon bending deformation of said element iron core during its formation and a tensile region of said stator core at an outer diameter side thereof subjected to tensile stress during formation, wherein said concave and convex portions are formed on each individual steel plate along said borderline at circumferential locations between adjacent ones of said slots, wherein, upon bending deformation of the stator core, the concave and convex portions have tensile regions and compressive regions that receive tensile stress and compressive stress, respectively, as well as said borderline, having a shape defined by a single line, which is a transition between the tensile region and the compressive region, wherein each of the plurality of axially extending slots has a first side, a second side opposite the first side, and a third side adjacent to the first side and the second side, wherein each of the plurality of axially extending slots has a first cutout notched portion, formed on the third side and being adjacent to the first side, and a second cutout notched portion, formed on the third side and being adjacent to the second side, the first cutout notch portion and the second cutout notch portion being configured to absorb a portion of bending deformation. |
