A stator for an electric motor, comprising: a pole chain made of a stack of a plurality of straight transformer sheets and rounded to a circular configuration by bending the stacked transformer sheets, wherein the pole chain has a plurality of pole portions each comprising a pole tooth; a plurality of winding cores attached to the respective pole teeth for accommodating coils (1a, 1b, 1c, 2a, 2b, 2c, 3a, 3b, 3c) of a three-phase winding comprising a single continuous wire (1, 2, 3) for each phase; wherein the wires (1, 2, 3) of respective phases (L1, L2, L3) of the three-phase winding are routed spatially separated from each other and without mutual contact along spatially separated routing paths at an axial end surface of the pole chain between and along adjacent winding cores around the pole chain; wherein the wires (1, 2, 3) of the respective phases (L1, L2, L3) are supported and guided such that their axial positions relative to the pole chain are maintained when the pole chain is rounded from its straight configuration to its circular configuration; characterized in that the wires (1, 2, 3) of the respective phases (L1, L2, L3) are routed between the adjacent winding cores in three axially separated routing planes, each of them is provided on a indifferent axial level along the axis of the rounded pole chain, which corresponds to the longitudinal axis of the electric motor, wherein each wire (1, 2, 3) of the respective phases (L1, L2, L3) is routed between the coils (1a, 1b, 1c, 2a, 2b, 2c, 3a, 3b, 3c) in a respective one of the three axially separated planes, and wherein the routing planes are kept constant along the entire pole chain such that the wires (1, 2, 3) of the respective phases (L1, L2, L3) do not cross each other or not swap the routing planes. a pole chain made of a stack of a plurality of straight transformer sheets and rounded to a circular configuration by bending the stacked transformer sheets, wherein the pole chain has a plurality of pole portions each comprising a pole tooth; a plurality of winding cores attached to the respective pole teeth for accommodating coils (1a, 1b, 1c, 2a, 2b, 2c, 3a, 3b, 3c) of a three-phase winding comprising a single continuous wire (1, 2, 3) for each phase; wherein the wires (1, 2, 3) of respective phases (L1, L2, L3) of the three-phase winding are routed spatially separated from each other and without mutual contact along spatially separated routing paths at an axial end surface of the pole chain between and along adjacent winding cores around the pole chain; wherein the wires (1, 2, 3) of the respective phases (L1, L2, L3) are supported and guided such that their axial positions relative to the pole chain are maintained when the pole chain is rounded from its straight configuration to its circular configuration; characterized in that the wires (1, 2, 3) of the respective phases (L1, L2, L3) are routed between the adjacent winding cores in three axially separated routing planes, each of them is provided on a indifferent axial level along the axis of the rounded pole chain, which corresponds to the longitudinal axis of the electric motor, wherein each wire (1, 2, 3) of the respective phases (L1, L2, L3) is routed between the coils (1a, 1b, 1c, 2a, 2b, 2c, 3a, 3b, 3c) in a respective one of the three axially separated planes, and wherein the routing planes are kept constant along the entire pole chain such that the wires (1, 2, 3) of the respective phases (L1, L2, L3) do not cross each other or not swap the routing planes.