Design and Analysis of 12/14 Hybrid Rotor Type Bearingless Switched Reluctance Motor

In order to address the issues faced by the conventional hybrid stator pole 12/14 bearingless switched reluctance motor (BSRM), such as low starting torque and high torque ripple, a 12/14 hybrid rotor type BSRM is proposed in this article. The hybrid rotor in this case comprises two distinct rotor types, each possessing its own rotor polar arc and axial length. This hybrid rotor structure guarantees a relatively constant change rate of inductance with respect to the rotor position. The ascending range of inductance is enlarged, therefore increasing the self-starting ability. To improve motor performance of the proposed, the parameters of hybrid rotor, including the polar arc and axial length of the rotor, are designed. The characteristics of the proposed structure are obtained using the finite element method (FEM). Additionally, a conventional 12/14 BSRM is also analyzed to facilitate comparison. The validity of the proposed structure is subsequently verified based on the analysis results.