A Harmonic Suppression SVPWM Strategy for the Asymmetric Six-Phase Motor Fed by Two-Level Six-Phase VSI Operating in the Overmodulation Region

Li Zhao, Shoudao Huang (), Jian Zheng and Yuan Gao
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Li Zhao: College of Electrical and Information Engineering, Hunan University, Changsha 410082, China
Shoudao Huang: College of Electrical and Information Engineering, Hunan University, Changsha 410082, China
Jian Zheng: College of Electrical and Information Engineering, Hunan University of Technology, Zhuzhou 412007, China
Yuan Gao: Faculty of Engineering, University of Bristol, Queens Road, Bristol BS8 1QU, UK

Energies, 2022, vol. 15, issue 20, 1-19

Abstract: For the asymmetric six-phase motor fed by a two-level six-phase voltage source inverter (VSI), when the modulation index is less than 0.5774, the motor operates in the linear region, and the harmonics in the Z 1 − Z 2 subspace can be suppressed to zero. When the modulation index is beyond 0.5774 and less than 0.6221, the motor operates in overmodulation regions, and the harmonics in the Z 1 − Z 2 subspace cannot be suppressed to zero. To minimize the harmonics in the Z 1 − Z 2 subspace for these regions, a harmonic suppression strategy, namely, harmonic suppression overmodulation strategy (HSOS), is proposed in this paper. The lower-order harmonics of the Z 1 − Z 2 subspace, namely, the 5th, 7th, 17th and 19th, are considered. Compared with the traditional four-vector overmodulation strategy (TFOS), the content of the 5th harmonic is reduced by about 20%, and the total harmonic distortion ( THD Z 1 Z 2 ) of these four kinds of harmonics is reduced by about 21% in the proposed HSOS. Finally, the simulation and experiment are carried out to verify the effectiveness of the proposed strategy.

Keywords: asymmetric six-phase motor; space vector pulse width modulation (SVPWM); total harmonic distortion (THD); two-level six-phase voltage source inverter (VSI); overmodulation (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2022
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