Abstract: An alternator for wind generator use employing a pair of stators having a rotor mounted therebetween in planar coaxial relationship. The stators have radially slotted coil forms integral therewith in which coils are wound in a serpentine fashion. The rotor is provided with an aluminum rim slotted in a radial manner inwardly of its periphery to hold permanent magnets, which magnets through the aid of the rim concentrate eddy currents in the coils in an improved manner.