Patent ID: 9601957
Date: 2017-03-21
CPC Classifications: H02K

Claim:
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.