Strip-shaped lamina and laminated stator core for an electric machine

A strip-shaped lamella for a stator of an electrical machine, comprising a yoke region;

• a number of first teeth that are of one piece with said yoke region on a first side of said yoke region and having first grooves between said first teeth;
• second teeth that are of one piece with said yoke region and are located at a position of said first teeth on a second side of said yoke region oriented away from said first side and having second grooves between said second teeth, said second teeth having a width b4 which corresponds to a perfectly straight portion of a groove bottom and a width b3 which corresponds to a distance between two intersecting points, said intersecting points being determined by theoretically extending tooth flanks of said second groove so that they intersect with imaginarily extensions of said groove bottom, and a ratio between the widths b4 and b3 is between 60% and 85%.

A laminated stator core for an electrical machine, comprising a plurality of strip-shaped lamellas, each of said lamellas having a yoke region, a number of first teeth that are of one piece with said yoke region on a first side of said yoke region and having first grooves between said first teeth;

• second teeth that are of one piece with said yoke region and are located at a position of said first teeth on a second side of said yoke region oriented away from said first side and having second grooves between said second teeth, said second teeth having a width b4 which corresponds to a perfectly straight portion of a groove bottom and a width b3 which corresponds to a distance between two intersecting points, said intersecting points being determined by theoretically extending tooth flanks of said second groove so that they intersect with imaginarily extensions of said groove bottom, and a ratio between the widths b4 and b3 is between 60% and 85%.

An electrical machine, comprising a laminated stator core composed at least partially of a plurality of strip-shaped lamellas, each of said lamellas having a yoke region;

• a number of first teeth that are of one piece with said yoke region on a first side of said yoke region and having first grooves between said first teeth;
• second teeth that are of one piece with said yoke region and are located at a position of said first teeth on a second side of said yoke region oriented away from said first side and having second grooves between said second teeth, said second teeth having a width b4 which corresponds to a perfectly straight portion of a groove bottom and a width b3 between which corresponds to a distance between two intersecting points, said intersecting points being determined by theoretically extending tooth flanks of said second groove so that they intersect with imaginarily extensions of said groove bottom, and a ratio between the widths b4 and b3 is between 60% and 85%.