Achievement of higher motor winding slot fill through the use of piezoelectric excitation device

This paper deals with a method to wind motor core slots with greater cross section of installed conductor wires than has been possible with prior turn-by-turn windings. Rapid turn-by-turn winding subjects conductor wires to varying tension which leads to successive slot wires not entering their slots parallel to previously wound wires. Successive turns do not move to the lowest zone of the slot due to friction coupling between themselves and previously wound wires. By inducing vibration in the wire as it is placed in the slot the wire is more apt to migrate to the lowest part of the slot where it can nest in a tighter configuration with the previously wound turns.