VOID WINDING STRUCTURE OF MOTOR ARMATURE

PURPOSE:To eliminate the complicated overlapping of windings for minimizing the increase of an armature diameter due to coil windings and to ensure the fixing of the winding, by pushing conductor wires of a second layer into window sections of the windings of a first layer to fix the windings on an armature core. CONSTITUTION:On the surface of an armature core 4 where no slots are cut, a first to n-th phase insulated conductors Cu 1, Cv 1 and Cw 1 to form a first layer are wound one after another adjoining each other circumferentially, over which each phase winding W1 in the first layer is wound. Then, the first to n-th phase insulated conductors Cu 2, Cv 2 and Cw 2 to form a second layer are pushed into the parts equivalent to the window sections Ww of each phase winding W1 in the first layer and fixed on the armature. Both windings corresponding to the first and the second layers are connected in parallel to let it represent each phase winding W2. Thus, the diametrical direction of the motor can be made smaller and the air gap winding structure of a motor armature in simple construction ensuring the fixing can be obtained.