2012 Fiscal Year Final Research Report
Study on a motor drive using a modular multilevel converter
| Project/Area Number |
23760255
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Multi-year Fund |
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| Research Field |
Power engineering/Power conversion/Electric machinery
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| Research Institution | Tokyo Institute of Technology |
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Principal Investigator |
HAGIWARA Makoto 東京工業大学, 大学院・理工学研究科, 助教 (20436710)
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| Project Period (FY) |
2011 – 2012
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| Keywords | パワーエレクトロニクス / 高圧モータドライブ |
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| Research Abstract |
This study has dealt with a modular multilevel converter (MMC) that is considered as one of the next-generation multilevel converters with a focus on its applications to medium-voltage motor drives. The study has shown that the MMC can operate without using any dc-link capacitors connected between the common dc terminals. Moreover, it has proposed a control method to achieve stable operation at low speed without inducing any overvoltage and/or overcurrent. Moreover, a stable startup from the standstill to the nominal speed has been achieved by applying the common-mode voltage injection method developed in this study. The validity of the motor drive has been confirmed by experiment using a 400-V, 15-kW downscaled model.
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