Stator with teeth skewed from the rotation axis

A method for assembly and/or manufacture of a stator for an electric machine, the stator comprising

• a stator pack including
• a rotor receiving region for receiving a rotor configured to be driven around a rotation axis within the rotor receiving region, and including
• at least one stator pole tooth
• which is surrounded by a coil surrounding a coil central axis and
• which includes a pole shoe adjacent to the rotor receiving region,
• wherein the coil central axis is skewed with respect to the rotation axis,
• wherein the stator pack includes an annular portion partially surrounding the rotor receiving region,
• wherein the stator pack includes a back iron configured to close a magnetic circuit and including a first part and at least one second part connected to the first part,
• wherein the first part of the back iron is integrally formed with the annular portion and the at least one second part of the back iron is connected to the first part at least in a form-fit manner,
• wherein the stator pack includes at least one further stator pole tooth with a further pole shoe,
• wherein the at least one further stator pole tooth is surrounded by a further coil surrounding a further coil central axis,
• wherein the further coil central axis intersects with the rotation axis,
• wherein the coil central axis and the further coil central axis are parallel to each other,
• wherein the stator pack includes at least one third stator pole tooth with a third pole shoe,
• wherein the at least one third stator pole tooth is surrounded by a third coil surrounding a third coil central axis,
• wherein the third coil central axis is skewed with respect to the rotation axis, and
• wherein the stator pack includes exactly three stator pole teeth provided with coils, respective coil central axes thereof being parallel to each other,
• the method comprising:
• (a) providing the stator pack with the back iron comprising the first part and the at least one second part, the at least one second part being disassembled, the first part of the back iron being integrally formed with the annular portion;
• (b) providing pre-assembled and/or identical coils as the coil, the further coil, and the third coil;
• (c) fitting the pre-assembled and/or identical coils, as viewed from the rotor receiving region, from outside onto the at least one stator pole tooth, the at least one further stator pole tooth, and the at least one third stator pole tooth;
• and
• (d) subsequently connecting the at least one second part of the back iron to the first part of the back iron to form the stator, at least in a form-fit manner.