CARCASSA IN LAMIERA CON NERVATURE

The motor stator casing is made of sheet metal which is folded to form a series of axial cooling fins (2). The folded sheet is then formed into a ring, with the fins projecting radially outwards, and the metal between the fins forming a series of flats (1). The internal end of each fin is pref. strengthened by a seam weld (3). The bore of the casing is determined by passing it over a mandrel with a diameter slightly less than the outside diameter of the core that the core is a secure press fit in the casing It also makes good thermal contact with the casing. Locations for feet (5) and end shields can be attached to the casing.