Abstract
The 3D end fields generated by the end windings can cause degraded performance in axially short machines, even when non-overlapping windings are employed. The aim of this study is to analyse the torque production capability (TPC) of segmental-rotor switched reluctance machines (SSRMs) taking into consideration the 3D end effects. A small modular part of an SSRM is simulated, built, and tested to investigate its static performance and analyse the energy conversion loops. In addition to the standard 2D and 3D calculations, a new method is proposed to determine the static characteristics of the active part of the machine and the end windings. The results confirm that the SSRM loses some of its TPC in two ways. Firstly, comparison with the static characteristics obtained from 2D FEM reveals that the active segment of the coil has a relatively smaller energy conversion loop. Secondly, the direct interaction between the end flux and the rotor can produce negative torque at high load. The amount of torque loss is proven to be significant when the stack length is short. The variation in torque loss with stack length is also analysed.
Published Version
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call