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- Falk Olson, Gustaf, 1992-, et al.
(författare)
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Harmonic Plane Decomposition : An Extension of the Vector-Space Decomposition - Part II
- 2020
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Ingår i: Proceedings of The 46th Annual Conference of the IEEE Industrial Electronics Society, IECON 2020. - : Institute of Electrical and Electronics Engineers (IEEE). ; , s. 991-996
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Konferensbidrag (refereegranskat)abstract
- In this paper the harmonic plane decomposition from part I is completed. Multiphase electrical machines with independently controlled stator coils benefit from a fixed amount of current controllers and unified models. In part I, the foundation for such models was laid. This paper shows that the choice of the base case has to fulfill certain criteria to properly represent vector-space quantities. More specifically, phase-pole configurations with an even number of pole pairs need adapted base cases with reduced rank as compared to the odd base case. Continuous modeling and control requires retention of the dimensionality of Clarke matrices. A different number of stator and rotor slots can lead to aliasing in the transformation, when keeping the dimension consistent. Therefore, a specific Clarke transformation for rotor quantities based on the developed theory is elaborated. Finally, it is demonstrated how the harmonic plane decomposition can be used to model each harmonic plane of an arbitrary phase-pole configuration with conventional machine equivalent circuits, e.g. the T-equivalent or inverse-Γ models.
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| 2. |
- Wu, Yixuan, 1993-, et al.
(författare)
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Harmonic Plane Decomposition: An Extension ofthe Vector-Space Decomposition - Part I
- 2020
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Ingår i: Proceedings of the 46th Annual Conference of the IEEE Industrial Electronics Society IECON 2020. - : Institute of Electrical and Electronics Engineers (IEEE).
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Konferensbidrag (refereegranskat)abstract
- In this first paper of a two-part series, the harmonicplane decomposition is introduced, which is an extension of the vector-space decomposition. In multiphase electrical machines with variable phase-pole configurations, the vector-space decomposition leads to a varying numbers of vector spaces when changing the configuration. Consequently, the model and current control become discontinuous. The method in this paper is based on samples of each single slot currents, similarly to a discrete Fourier transformation in the space domain that accounts for the winding configuration. It unifies the Clarke transformation for all possible phase-pole configurations such that a fixed number of orthogonal harmonic planes are created, which facilitates the current control during reconfigurations. The presented method is not only limited to the modeling of multiphase electrical machines but all kinds of existing machines can be modeled. In the second part of this series, the harmonic plane decomposition will be completed for all types of machine configurations.
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