Modular Vector Control of Multi-Three-Phase Permanent Magnet Synchronous Motors

Abstract

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A Novel Matrix Transformation for Decoupled Control of Modular Multiphase PMSM Drives

“…The proposed control solution allows CVC implementation for a generic PMSM with a modular configuration of the stator winding, thus presenting general validity. In detail, the new decoupling transformation (11) is implemented to the basic structure of an MS-based CVC scheme [32], [34], [36]. Therefore, for each generic winding set k (k = 1÷n), a dedicated CVC is implemented, thus confirming the proposed control solution's modularity.…”

“…Indeed, only the winding sets' balanced operation can minimize the overall Joule losses [17]. However, with the development of the "series/parallel configurations" [17], [44], [45], the control solutions able to perform the power-sharing among the winding sets have gained more attention, leading to several technical contributions [17], [18], [32], [36], [37]. Also, for testing high-power machines, the power-sharing strategies are a viable solution for performing back-to-back regenerative tests [37], [46], [47], thus avoiding the need for expensive highpower prime movers.…”

“…10. Therefore, the global application of the VSD modeling has not been possible, making the DMS approach a viable control solution together with the conventional MS-based CVC scheme [32], [34], [36].…”

“…Indeed, just a negligible coupling among the common-and differentialmodes subspaces arises, thus further demonstrating the proposed control solution's robustness. In Table I, the machine's primary parameters are listed [34], [36].…”

“…Besides, an MS-based control scheme allows implementing modular PWM algorithms, as the voltage control of each winding set is independent of that of the others [33]. However, MS modeling leads to strong magnetic coupling among the winding sets [33], [34], [36], [37]. As demonstrated in [38], this effect can cause the potential instability of the MSbased control schemes, making necessary the implementation of complex decoupling algorithms [33], [34], [36], [37].…”