A meandering annular winding coil forming technique using pre-formed polygonal annular winding

摘要

PPROBLEM TO BE SOLVED: To provide a forming method in which the length of the upper surface, the central portion and the lower surface is not differentiated even if press forming of an annular coil is carried out and the side face of a coil is not curved into drum shape, and to present a winding method in which the opposite ends of the coil are located on the outer circumferential surface of the annular coil without requiring a step for bending the coil after it is assembled. PSOLUTION: The method for forming a meandering annular winding coil, i. e. a method for forming an annular winding coil having a plurality of meandering portions arranged in the stator of a motor, includes a step of winding a wire annularly, and a step of pressing the annular winding formed by the annular winding step in the axial direction and the radial direction to have a plurality of meandering portions wherein the annular winding step forms polygonal annular windings in a plurality of rows and a plurality of layers while locating the opposite ends on the uppermost layer. PCOPYRIGHT: (C)2009,JPO&INPIT