A stator coil of a generator for vehicles is provided with a stator coil construction and method for winding the stator coil around the core. The coil is wound around the stator core so that a portion of the stator coil projects from one or both sides of the stator core in the axial (longitudinal) direction of the core. The projecting portion of the stator coil closely surrounds the rotor core and is composed of inner and outer wire batches between which are formed slits which permit cooling air to pass therethrough and cool the coil more efficiently. The cooling air is generated by a fan which is attached to the rotor core facing the inner surface of the projecting portion of the stator coil.
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