Slot cooling fins in electrical machines

A method of manufacturing a stator for an electric machine, the method comprising:

• manufacturing a planar member that includes a stator yoke comprising a first surface facing radially outward, a second surface facing radially inward, a plurality of teeth extending radially inward from second surface, a first tooth tip extending in a first direction from a proximal end of each tooth of the plurality of teeth into a first slot defined between a first tooth of the plurality of teeth and a second tooth of the plurality of teeth on a first side of the first tooth, a second tooth tip extending in a second direction opposite the first direction from the proximal end of each tooth of the plurality of teeth into a second slot defined between the first tooth of the plurality of teeth and a third tooth of the plurality of teeth on a second side of the first tooth opposite the first side, a first slot cooling fin disposed at a radial location on the first side of the tooth between the second surface of the stator yoke and the first tooth tip of the tooth, and a second slot cooling fin disposed at a radial location on the second side of the tooth between the second surface of the stator yoke and the second tooth tip of the tooth;
• disposing a first coil into the first slot such that the first coil surrounds the first slot cooling fin;
• and
• disposing a second coil into the second slot such that the second coil surrounds the second slot cooling fin.