Comparison Between Segmental and Salient Rotors of Single-phase Field Excitation Flux Switching Motor with Non-Overlap Windings for Lightweight Applications

The main advantages of field excitation flux switching motor (FEFSM) are high power, simple structure and, robust rotor, making it very suitable for high-speed applications. However, the previous single-phase FEFSMs using overlap winding and salient rotor have high rotor weight, low torque and low efficiency need to be improved. In this paper, a new structure of single-phase non-overlap winding FEFSMs using salient (SalRoN) and segmental (SegRoN) rotors are proposed. The proposed motors are designed and analysed by 2D-FEA via JMAG Designer version 15. Performances verification is conducted by comparing the various magnetic flux characteristics, torque at multiple combinations of armature current and field excitation current, and torque-power versus speed profiles. In short, the SegRoN design has produced power, initial torque and based speed of 277.5 W, 0.91 Nm and 2,899 rpm which are higher than SalRoN design of 3.2 times, 2.1 times, and 63.9%, respectively. As a conclusion, performances of the proposed non-overlap windings FEFSMs have been successfully compared, SegRoN design having high potential to be applied for lightweight applications.