Abstract: A ferromagnetic core for a stator coil of a permanent magnet electric rotary machine, wherein the ferromagnetic core includes a compound including a polymer matrix composition and a functional filler, the functional filler including a material selected from ferromagnetic material, magnetic material, and a combination thereof. The ferromagnetic core includes at least one fluid channel extending through the core. A stator coil for an electric rotary machine, including a ferromagnetic core and at least one winding of a conductor wound around the core. A stator for an electric rotary machine, including a stator frame around a central axis, having an opening for receiving a fluid flow and stator coils. A permanent magnet electric rotary machine including a rotational shaft, a stator, a rotor connected to the rotational shaft, wherein the rotor is provided with permanent magnets, the permanent magnets facing the ferromagnetic cores of stator coils of the stator.