Design of a flux switching transverse flux machine based on generalized inductance analysis

This paper is dedicated to studying the inductance of Transverse Flux Machines (TFMs). The high inductance of TFMs causes low power factor, high armature reaction, high core loss, and core saturation that limits available torque. This paper aims to conduct a quantitative study on various components of TFM inductance through analytical equations and 3-D finite element analysis (FEA) to show the reasons for, and the effects of, TFM's high inductance. The study finds that even though the high inductance and low power factor are unavoidable in TFM because of its unique winding structure, there are design methods to mitigate this issue. Finally, utilizing the proposed methods, a novel flux switching TFM (FS-TFM) is designed that achieves reduced inductance and improved power factor.