3-D SVM for Three-Phase Open-End Winding Drives With Common DC Bus

作者：Dong, Zhiping; Wen, Hao; Song, Zaixin; Liu, Chunhua^*

来源：IEEE Transactions on Power Electronics, 2023, 38(8): 9340-9346.

DOI：10.1109/TPEL.2023.3274417

• Open-end winding drives (OWDs)
• three-dimensional space vector modulation (3-D SVM)
• voltage vector selection
• zero-sequence loop (ZSL)

Existing modulation strategies for three-phase open-end winding drives (OWDs) with common dc bus usually conduct the modulations for alpha-beta subspace and zero-sequence loop (ZSL) separately, which cannot reflect the relationship between alpha-beta subspace and ZSL and fully utilize the dc bus voltage. To this end, this article proposes a three-dimensional space vector modulation (3-D SVM) strategy for three-phase OWDs with common dc bus, which can be conducted in both a-b-c and alpha-beta-z coordinates, leading to full utilization of dc bus voltage and convenient over-modulation adjustment. Voltage vector distributions of OWD in the 3-D spaces with a-b-c and alpha-beta-z coordinates are revealed at first. Subsequently, the three adjacent voltage vectors for reference voltage vector synthesis are selected based on the relationship between leg-voltage potentials, avoiding the complex tetrahedron identification in existing 3-DSVMsfor other drive topologies. In addition, overmodulation in different coordinates is also investigated. Experimental results are presented to validate the feasibility of the proposed 3-D SVM for OWDs with common dc bus.