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The HEFS machines were proposed by reducing the permanent magnet (PM) length of a flux-switching permanent magnet (FSPM) machine and introducing a set of field windings into the saved space. Thus, the HEFS machines shares the identical motor laminations, meanwhile different PM and field winding locations. Based on 2D finite element analysis (FEA), this paper is focused on the comparison of electromagnetic...
This paper reviews the concepts, developments and applications of the novel permanent magnet brushless machines having magnets and windings in the stator with particular emphasis on operation principles, electromagnetic performance, design and control aspects. The key features of the machines are summarized. Moreover, the recent development and emerging research directions of the machines are also...
A general power equation for permanent magnet doubly salient electrical machine (DSEM) is developed. The new power equation reveals the relationship between the machine structure and the electromagnetic design parameters, laying a foundation for design and optimization of DSEM. Three typical DSEMs, namely doubly salient permanent magnet (DSPM) machine, flux reversal machine (FRM), and flux-switching...
A new stator hybrid excited doubly salient (HEDS) machine with a special saturated magnetic bridge is presented, which combines the advantages of permanent magnet machines with the possibility of controllable magnetic flux by auxiliary DC field windings. The design details and analysis of a 12/8-pole HEDS machine has been presented. The capability of flux control is obtained by using finite element...
In this paper, a novel stator hybrid excited doubly salient (HEDS) machine is proposed, which combines the advantages of PM machines with the possibility of controllable magnetic flux by auxiliary dc excited windings. The influence of end-leakage effect on the back-EMF waveforms is taken into account. The electromagnetic performances are predicted and compared with 2-D and 3-D finite element analyses...
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