The　failure　of　the　inverter　bridge　arm　or　the　open　circuit　of　the　phase　winding　may　occur　during　the　operation　of　a　combined　winding　bearingless　flux-switching　motor,　causing　both　rotor　rotation　and　suspension　to　malfunction,　hence　fault-Tolerant　control　is　vital　for　the　motor＇s　reliability　and　stability.　In　this　paper,　a　fault-Tolerant　operation　control　strategy　for　combined　winding　bearingless　flux-switching　permanent　magnet　motors　under　open-circuit　fault　condition　is　proposed.　Firstly,　how　to　control　the　electromagnetic　torque　and　suspension　force　acting　on　the　rotor　with　the　combined　winding　structure　is　explained,　and　then　the　mathematical　models　of　the　torque　and　suspension　force　which　can　be　controlled　individually　by　different　current　components　are　deduced　in　detail.　Afterward,　the　relation　of　the　phase　current　without　and　with　winding　fault　is　discussed,　and　the　operation　conditions　of　maintaining　constant　torque　and　suspension　force　after　fault　are　demonstrated.　Whereupon,　the　fault-Tolerant　control　block　diagram　is　constructed.　Finally,　the　experimental　results　are　presented　to　demonstrate　the　performance　of　the　proposed　strategy.　©　1986-2012　IEEE.