Vector control for dual three-phase PMSG and digital implementation

For dual three-phase permanent magnet synchronous generator (DTP-PMSG) with two sets of Y-connected windings phase shifted by 30 electrical degrees, the mathematic models are established by double d-q transformation and vector space decomposition (VSD) methods separately. By applying VSD for DTP-PMSG, the relationship of each subspace with electromechanical energy conversion was analysed. On the basis of mathematic models, the algorithm for digital implementation was discussed deeply. An improved discrete maximum vector method (DMVM) was proposed in order to avoid insulated gate bipolar transistor (IGBT) opening in wholly period in traditional methods. Some experiments validate two methods, at same bus voltage level, and the experiment results indicates that two methods can reach the same goal; however, the harmonics orders contained in current are not identical in two methods, validate the effectiveness of proposed methods in DTP-PMSG vector control.