Algorithmic Approach for Slot Filling Factors Determination in Electrical Machines

Abstract

In several industrial sectors, such as electric and hybrid traction, the demand for increasingly efficient and high power density electrical machines has grown considerably over the last few years. The improvement of slot filling factor of the electrical machines is an useful provision to satisfy this request. In particular, this topic has been the subject of interest for the industrial sector in recent years, since the technology of winding processes have evolved and allow an economically sustainable realization of windings with an ordered structure rather than randomly. The winding phase must be supported by an accurate design process in which it is possible to evaluate the maximum slot filling factor obtainable for a given wire shape and for given dimensions. In this sense, this paper presents an algorithm approach for the calculation of maximum slot filling factors in electrical machines. In particular, the slot filling factor evaluation was carried out both for standard and non-standard slots and with the use of round and rectangular wires. The algorithm proposed can be considered as an additional useful tool for fast design of electrical machines windings.