期刊
IEEE TRANSACTIONS ON POWER ELECTRONICS
卷 31, 期 2, 页码 1367-1380出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TPEL.2015.2414437
关键词
Harmonics suppression; multiphase machines; overmodulation; pulse width modulation (PWM); six-phase voltage source inverter (VSI)
资金
- Research Fund for the National Natural Science Foundation of China [51177026]
- Doctoral Program of Higher Education [20132302120005]
- Fundamental Research Funds for the Central Universities [HIT.NSRIF.2014013]
This study presents a novel overmodulation strategy for a six-phase voltage source inverter (VSI)-fed dual three-phase permanent-magnet synchronous motor. The proposed strategy can achieve minimum harmonic injection in the overmodulation region. Four-vector space vector pulse width modulation (SVPWM) renders mathematic foundations for this given method. However, the classical four-vector SVPWM used in six-phase VSI has asymmetrical pulse width modulation waveform, which makes it difficult for hardware implementation. In this paper, the modulation algorithms in both linear and overmodulation regions have been unified and implemented with the double zero-sequence injection PWM strategy. This strategy is able to overcome the inherent shortcomings of the four-vector SVPWM, and it achieves smooth transitions from linear to overmodulation region. Simulation analysis and experimental results demonstrate the effectiveness and feasibility of the proposed strategy.
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