Research on the Relationship Between the Distribution of High-Permeability Materials in Rotor and Characteristics of Magnetic Field in Machines

Synchronous reluctance machine (SRM) has advantages such as low cost and stable performance, however its plenty of structural parameters lead to complex and low-efficiency design. The complex distribution of magnetic barrier in SRM is the reason why its performance is superior to that of machine likes machine with simple salient pole and the above problems. Firstly, the factors that affect the torque of SRM are derived from the perspective that magnetomotive force of armature is modulated at d- and q-axis. The characteristics and corresponding design ideas of machine with different shapes of magnetic barrier and loads are researched based on airgap magnetic field and magnetic field distribution. The relationship between the spatial distribution of SRM with magnetic barriers of various quantities and magnetic field is analyzed and summarized. The parameters of SRM that generate larger and more stable torque and the methods for analyzing SRM are given. The above analysis and effect of improving performance and design efficiency were verified by finite element analysis (FEA) in different 4P/24S SRMs.