Common　mode　voltage　(CMV)　with　high　frequency　and　high　amplitude　is　an　important　cause　of　motor　winding　failure　and　bearing　damage,　and　its　electromagnetic　interference　can　easily　affect　the　normal　use　of　surrounding　equipment.　A　model　predictive　torque　control　(MPTC)　strategy　with　common　mode　voltage　suppression　was　proposed　in　this　paper　for　the　six-phase　and　three-phase　permanent　magnet　synchronous　motor　(PMSM)　series-connected　system.　Only　20　basic　voltage　vector　with　zero　common　mode　voltage　were　selected　to　suppress　the　common　mode　voltage　of　the　system.　To　suppress　the　zero　sequence　current　of　the　system,　13　virtual　voltage　vectors　with　zero　sequence　voltage　of　0　were　synthesized　from　20　basic　voltage　vectors.　Furthermore,　a　zero　sequence　current　PI　regulator　was　introduced　to　adjust　the　duty　cycle　of　two　basic　voltage　vectors　used　to　synthesize　the　virtual　voltage　vector　to　suppress　the　zero　sequence　current　caused　by　the　nonlinear　factors　of　actual　system.　The　experimental　results　show　that　the　proposed　strategy　not　only　realizes　torque,　stator　flux　amplitude　tracking　and　zero　sequence　current　suppression,　but　also　effectively　inhibits　the　common　mode　voltage　of　the　system.　©　2021　Chin.　Soc.　for　Elec.　Eng.