Compact multiphase wave winding of a high specific torque electric machine

摘要

The invention is the compact multiphase wave winding of a high specific torque electric machine;The invention is the compact multiphase wave winding (6) of the electric machine. Winding (6) is filling the slots (5) of the stator ferromagnetic core (3) and comprise one or multiple layers (40). Winding (6) fills the slots (5). Winding comprise N or a multiple on N conductors (8), where N represents the number of winding phases. Conductor (8) comprises or is assembled by parallel straight segments (10) and winding overhangs (11). Between the two straight segments (10) of one conductor (8) there are N teeth (4) and N−1 slots (5) or N+1 teeth (4) and N slots (5). Straight segments are connected by winding overhangs which shape in tangential axial plane differs for less than one sixth of magnetic period (7) from ellipse shape with one axis equal to half of magnetic period (7) and other axis length between half and three quarters of magnetic period (7) length.

主权项

1. Compact multiphase wave winding of electric machine with high specific torque, which fills slots on ferromagnetic core, the compact multiphase wave winding comprising one or more layers, which fill the slots and consist of N or a multiple of N conductors, where N represents the number of motor phases and where each conductor is shaped or assembled in such a way, that the conductor consists of parallel straight sections and winding overhangs, where there are N teeth and N−1 slots or N+1 teeth and N slots and where straight sections of the conductor are connected by winding overhangs, shape of which in tangential plane differs for less than one sixth of magnetic period from ellipse shape with one axis equal to half of magnetic pole pair and other axis length between half and three quarters of magnetic pole pair length, and the winding overhangs are curved at the beginning and at the end in one radial direction and curved in the middle in the opposite radial direction, wherein the beginning and the end are the sections of said winding overhang located adjacent to the respective parallel straight segments that the winding overhangs connect, and the middle is the section of a winding overhang located between the sections at the beginning and the end thereof.