In this paper, the core loss and permanent magnet (PM) eddy current loss on diﬀerent parts of double-stator switched ﬂux PM machine are presented. Furthermore, the eﬃciency of the analysed machine is also given. The calculation includes the losses at a diﬀerent load current, at a diﬀerent rotor speed and at varying rotor position. The analyses show that the machines with high rotor pole numbers have large PM eddy current loss and core loss values due to their high electrical frequencies. Overall, the eﬃciency of the analysed 14-pole machine having all-pole wound topology seems to be the best amongst the compared machines, as the core and PM eddy current losses are quite lower than the machine’s dominant copper loss. The inﬂuence of rotor pole number on loss and eﬃciency characteristics of the developed double-stator PM machines is investigated and quantitatively compared in this work in addition to the eﬀect of diﬀerent winding topologies on the overall machine performance.