Magnetic core with multiple teeth having four different teeth tips axially overlapping

A magnetic core for an electric motor, comprising:

• a ring-shaped yoke;
• teeth extending outwardly from the yoke, and
• a tooth tip extending from a distal end of each tooth in a circumferential direction of the core, each tooth tip having a left half tooth tip and a right half tooth tip;
• wherein the magnetic core has a plurality of lamination layers, each lamination layer comprising:
• multiple teeth comprising four type teeth sequentially arranged along a clockwise direction having a first type tooth, a second type tooth, a third type tooth and a fourth type tooth, an interval between each two adjacent teeth being the same, the left half tooth tip of the first type tooth being a short tooth tip, the right half tooth tip of the first type tooth being a long tooth tip, the left and right half tooth tips of the second type tooth being both short tooth tips, the left half tooth tip of the third type tooth being a long tooth tip, the right half tooth tip of the third type tooth being a short tooth tip, the left and right half tooth tips of the fourth type tooth being both long tooth tips;
• and
• wherein, in an axial direction of the motor, the first type tooth of at least one lamination layer overlaps with the third type tooth of another lamination layer, the second type tooth of the at least one lamination layer overlaps with the fourth type tooth of the another lamination layer, the third type tooth of the at least one lamination layer overlaps with the first type tooth of the another lamination layer, and the fourth type tooth of the at least one lamination layer overlaps with the second type tooth of the another lamination layer.