Abstract: In order to mitigate the high common-mode voltage (CMV) problem in dual three-phase permanent magnet synchronous motors (PMSM), a finite control set model predictive current control (FCS-MPCC) strategy is proposed, which is based on an expanded control set and optimized modulation of the duty cycle to eliminate CMV. First, a control set of zero common-mode voltage (CMV) vectors is established. To mitigate harmonic currents, six fundamental virtual voltage vectors are generated through a virtual voltage vector synthesis technique. Furthermore, to minimize the fundamental plane current tracking error, six additional virtual voltage vectors with new orientations are synthesized, forming an expanded control set comprising 12 virtual voltage vectors. Second, a sawtooth carrier modulation scheme is employed, achieving fixed switching frequency by inserting zero voltage vectors at the beginning, middle, and end of the switching sequence. Finally, simulation comparisons with existing FCS-MPCC methods for CMV suppression in a dual three-phase PMSM validate the proposed strategy’s superiority in terms of CMV suppression and current tracking accuracy.