METHOD FOR FORMING MEANDERING ANNULAR MOTOR COIL NOT FORMED INTO DRUM SHAPE, AND ALMOST POLYGONAL ANNULAR WINDING USED FOR THE SAME

摘要

PPROBLEM TO BE SOLVED: To present a more preferable method for finishing an annular coil having a plurality of meandering parts into a design shape without causing a drum-like swelling phenomenon after press forming. PSOLUTION: An annular coil is arranged inside a motor stator and has a plurality of meandering parts each comprising a crest part, a trough part, and a connecting part for connecting between the crest part and the trough part. A deformed almost-polygonal annular winding is used as an annular winding before forming each meandering part that is used to form the annular coil. The deformed almost-polygonal annular winding is configured such that each part becoming the connecting part connecting the crest part and the trough part is formed into a linear shape while each part including the crest part and the trough part and excluding the connecting part is formed into a corner part having a curvature in accordance with a diameter of the annular winding after a press-forming step. PCOPYRIGHT: (C)2010,JPO&INPIT