Comparison of doubly salient permanent magnet machines with E-shaped and π-shaped stator iron core segments

Recently, double salient permanent magnet (DSPM) machines have been attracting more and more attentions due to the merits of simple and robust rotor and ease of permanent magnet (PM) heat management [1]. In fact, the DSPM machine can be considered to be a combination of a switched-re-luctance machine and stator PMs. As shown in Fig. 1, in the conventional 3-phase DSPM machine, the stator salient teeth wound with 3-phase concentrated windings is composed of E-shaped iron core, between which the PMs are sandwiched in the stator yoke and the magnetization directions of these PMs are adjacent alternant in tangential direction. Since there are no windings and PMs in the rotor, the DSPM machine has the potential for use as a…