“…Additionally, they also studied a PMSG with embedded salient PM poles for offshore WP, which can protect PMs from the corrosion of salt mist [53], and an outer-rotor PM generator with doubly saliency structure for DD wind turbines that combine the advantages of PM machines and SRG [54]. Nanjing University of Aeronautics and Astronautics put forward a low speed doubly saliency electro-magnetic generator (DSEG) for DD WP system [55], and its control strategy and dynamic performance with different inductive and capacitive loads are studied in depth [56]. They also presented a DSHEG with an inner rotor, the output voltage stability of which can be ensured by a bidirectional excitation voltage regulator [57].…”