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Open-End Nine-Phase Machine Conversion Systems
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DOI：10.1109/TIA.2017.2669318.png)
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摘要
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This paper proposes four open-end nine-phase conversion systems with a reduced number of controlled switches. For this to be achieved, a converter is shared among the three three-phase groups that compose the machine. In addition, in order to reduce the number of controlled switches even more, three of the studied topologies with a shared converter make use of diodes replacing some of the switches. Because of the shared converter, the configurations that make use of diodes are only applied for machines with no spatial shift between the machine three three-phase groups. Analysis of harmonic distortion for equal and unequal dc-link voltages is presented. It is shown that the harmonic distortion for configurations with diodes are higher when unequal dc-link voltages are used. Besides, study of machine torque ripple is performed and a pulse-width modulation strategy modification is made aiming torque ripple reduction for two of the proposed conversion systems. Simulation and experimental results are presented to validate the theoretical approach.
Keyword:
Dual converter
nine-phase machine drives
openend winding configurations
reduced-switch count converters
torque ripple
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期刊
IF:
4.5
论文数:
1.1W
被引数:
3.5W
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