A novel stator hybrid excited doubly salient permanent magnet brushless machine for electric vehicles

In this paper, a novel stator hybrid excited doubly salient permanent magnet (SHEDS-PM) brushless machine with a special magnetic bridge is proposed for the first time. The originality of this machine is purposely to add a magnetic bridge in shunt with each PM pole, which not only maintains the stator lamination in its entireness, but also amplifies the effect of dc field flux on PM flux. An equivalent magnetic circuit is presented to clarify the novelty and the finite element analysis is adopted to determine the machine characteristics. The corresponding results on a prototype machine illustrate that the proposed machine is promising for application to electric vehicles.