Abstract: It is proved that multiphase motor has the advantage of good fault tolerant performance. Based on an 8/6-pole four-phase wound-field double salient motor(WFDSM) prototype, control strategies of the driving inverteris presented according tothe mechanism and properties of electromagnetic torques production. Operation characteristics undernormal and single phase open circuit conditions are investigatedwith the help of finite element analysis(FEA). To improve theelectromagnetic performance of single phase open circuitfaulty operation, a fault tolerancestrategy is proposed for the WFDSM machineby analyzing thecontributions of each armature winding to electromagnetic torques. The proposed topology is validated by simulation which shows that the proposed topology can enhancethe electromagnetic performance of faulty operation.