Comparison of Three Topologies Rotor to Improve Efficiency and Torque for High-Speed Spindle Motor Applications

This paper presents the design of three closed slot rotor topologies as circular, round, and oval. The design generated using the Taguchi, equivalent circuit, and finite element method (FEM) for high-speed, high-torque, and high-efficiency. For a fair comparison, the topologies are tested using FEM under the same conditions and specifications and an equivalent circuit is used for verifying and analyzing their output powers, torques, and efficiencies. The results help simplify rotor selection for various spindle motor applications requiring high efficiency and torque.