In the finite control set model predictive current control (FCS-MPCC) strategy for dual three-phase permanent magnet synchronous motor (DTP-PMSM), For the purpose of suppressing harmonic current, the large and medium-large voltage vectors in the α-β subspace are used to compose virtual voltage vector (VVV). Make use of their opposite characteristic in the x-y subspace, the average voltage of VVV in the x-y subspace is 0 by distributing the application times of two voltage vectors. However, the medium-large voltage vectors of x-y subspace are used, this leads to relatively large fluctuation of the harmonic current. To further suppress harmonic current, a three-vector based VVV is proposed. Each large voltage vector in α-β subspace and its two adjacent large voltage vectors are used to synthesize virtual voltage vector, The voltage vectors used are the small voltage vectors of the x-y subspace, which further reduces the harmonic current without extra computation burden or reduction of voltage utilization rate. The feasibility and effectiveness of the proposed method are verified by simulation.

DTP-PMSM;,virtual voltage cevtor,Model predictive current control (MPCC)