Abstract
Doubly salient permanent magnet machine (DSPMM) has received extensive attentions recently due to its simple structure, high reliability, high torque density, etc. An improved 4/4 stator/rotor single-phase asymmetric-stator-pole doubly salient permanent magnet machine (SP-ASPDSPMM) is proposed in this paper. Firstly, it investigates the topologies and operation principle based on graphical description and torque expression. Then, the effect of main structure parameters on the torque is studied based on two-dimensional finite element algorithm (2-D FEA). And then, comprehensive comparison on main electromagnetic performances for the two machines is made. Finally, one prototype for the improved structure is made and tested. It indicates that lower cogging torque, lower torque ripple and stronger starting performance can be obtained by the improved structure. The theoretical results are well validated by the experiments.
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