An improved 2-phase snail-cam type fan motor design

This paper deals with the design of a 2-phase switched reluctance motor (SRM) used for the cooling fan motor of a refrigerator. To reduce the dead zone and improve the efficiency, the snail-cam type rotor pole and the asymmetric stator pole are investigated. For the optimal shape design, the performances of each model are obtained from numerical calculation results by 2D time-stepping finite element method (FEM) coupled with circuit equations. The accuracy of analysis is verified by comparing the analysis results with experimental data. As the results of investigation, an improved shape of stator and rotor poles are proposed.