Due to the high efficiency and force density, linear switched flux permanent magnet machine (LSF-PMM) is gaining more and more attention in direct drive technology. For conventional LSFPPM, the structure enables the PMs and windings to be arranged on the same side, which largely reduces the manufacture cost [1]. However, with the insert of PMs into adjacent teeth, limited by the volume of primary, the slot area has to be reduced. That is to say, the trade-off between PM and winding space should always be taken into consideration.