New flexible harmonic cost effective concentrated winding topology

This paper presents a new three phase single tooth concentrated winding topology. With the new locally asymmetric configuration, each individual harmonic can be addressed, so operations with any number of pairs of poles are possible. Furthermore, the new arrangement of single coils presented here allows variations of winding characteristics such as winding factor, spectrum of the magnetomotive force etc. Using a combination of this winding with a squirrel-cage rotor shape a robust and reasonable solution for implementation in safety-critical but cost effective automotive applications, especially in case of strictly limited axial machine dimension. In this paper three different winding layouts are compared on a very compact installation space, specified for a 30 kW starter-generator.