DefinePK

Abstract

Wound-field switched-flux machines (WFSFM) have an intrinsic simplicity and high speed that make them well suited to many hybrid electric vehicle (HEV) applications. However, overlap armature and field windings raised the copper losses in these machines. Furthermore, segmented-rotor configuration is employed to enhance the characteristics of motor, however it made the rotor less robust and cannot be applied in high speed applications. To overcome these problems, this paper presents novel topologies for three-phase wound-field switched-flux machines. Both armature and field winding are located on the stator and rotor is composed of only stack of iron. Non-overlap windings and salient rotor are the clear advantages of these topologies as the copper losses gets reduce and rotor becomes more robust. Design feasibility and performance analysis of 12 slots and different rotor pole numbers are examined on the basis of coil arrangement test, peak armature flux linkage, back emf and cogging torque by using Finite Element Analysis (FEA). Flux distributions, split ratio and average torque are also investigated for 12Slot-8Pole and 12Slot-7Pole WFSFM.