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- Title
A Space Vector Modulation Strategy for Improving Voltage Transfer Ratio of Multi-Phase Inverter.
- Authors
Xia, Yihui; Jing, Mingchen; Ma, Yuanzheng
- Abstract
In the five-phase-inverter adjustable speed system, a five-phase two-level inverter usually adopts the nearest-two vector SVPWM (NTV-SVPWM) or the nearest-four vector SVPWM (NFV-SVPWM). The former one has a high-output-current harmonic, which increases the power losses, while the latter one has a low harmonic, but its sinusoidal voltage transfer ratio (VTR) is 0.812, which decreases load capacity. To improve the loading capacity and decrease the power losses of the five-phase-inverter adjustable speed system, a new space vector over-modulation method based on multi-vector weighting is proposed in this paper, and harmonic characteristics of the proposed over-modulation method are analyzed. The simulation results indicate that the proposed over-modulation method has a lower output voltage error than that with the traditional NFV-SVPWM and has a lower output current THD than that with the traditional NTV-SVPWM. The experimental results verify that the proposed method is correct and feasible.
- Subjects
VECTOR spaces; VOLTAGE; LOW voltage systems
- Publication
Electronics (2079-9292), 2024, Vol 13, Issue 10, p1907
- ISSN
2079-9292
- Publication type
Article
- DOI
10.3390/electronics13101907