Arbitrary d–q current sharing in three-phase winding sets of multi-phase machines

Abstract

This study proposes a technique for arbitrary current sharing between winding sets of any multiple three-phase machine by using a decoupled control in two-dimensional orthogonal vector space decomposition subspaces. With ability to arbitrarily set the d–q currents in all winding sets, both active and reactive power of each winding set can be arbitrarily set as well. Normally, this behaviour requires machine model in multi-stator variables where control implementation may be challenging due to the cross-coupling between winding set variables. On the contrary, in this study, the correlation between multi-stator and the vector space decomposition modelling has been used so that benefits of both modelling approaches are fully utilised: a decoupled control feature thanks to vector space decomposition and an ability to individually control winding set currents, a feature of the multi-stator modelling approach.

Keywords

• vectors
• machine control
• stators
• electric current control
• reactive power
• orthogonal vector space decomposition subspaces
• arbitrary d–q current sharing
• multistator modelling
• decoupled control feature
• winding set variables
• machine model
• three-phase machine
• multiphase machines
• three-phase winding sets
• multistator variables