Performance Comparison of 24slot-10pole and 12slot-8pole Wound Field Three-phase Switched-flux Machine

This paper presents a comparative study of two types of wound field three-phase switched-flux machine (SFM) with non-overlap winding and salient rotor. Both armature and field winding are located on the stator and rotor is composed of only stack of iron. Non-overlap armature and field windings and toothed-rotor are the clear advantages of these machines as the copper losses gets reduce and rotor becomes more robust. Initially, the motor general construction, the working principle and design concept of proposed machines are outlined. Then, coil arrangement test, peak armature flux linkage, back emf, cogging torque, average torque and torque-speed characteristics of both machines are analyzed and compared by two-dimensional finite element analysis(2DFEA). Keyword: Low cost, wound field switched-flux machine, salient rotor, non-overlap winding, field excitation coil