An electric machine which has an arched stator and a cylindrical rotor fitted inside it and in which the flux flows in the radial direction between the stator and the rotor as in a permanent-magnet radial-flux synchronous electric machine, and in which the stator of the machine consists of stator segments (2), each of which has an independent stator core and winding, and the stator segments are arranged to be physically separate from each other so that the stator consists of stator segments arched according to the radius of the rotor and working electromagnetically independently like a linear machine, each stator segment having a stator core and a winding separate from the other stator segments, and that it comprises an overhead supporting frame structure separate from the stator cores and consisting of several longitudinal ribs (41) and parts (42) between them.