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- 저자 : Rik W. A. A. De Doncker (검색결과 2 건)
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High-Speed Switched Reluctance Drives
Andreas G. Hofmann,Knut A. Kasper,Rik W. De Doncker 전력전자학회 2011 ICPE(ISPE)논문집 Vol.2011 No.5
Since electric vehicles are becoming increasingly popular, there will be a large market for electric machines to power them. The typically applied rotating field machines, however, are not cost-efficient. Thus, the aim of this paper is to present an inexpensive alternative to power future electric cars using high-speed switched reluctance drives. Hereby, a conventional medium-speed and a high-speed switched reluctance machine were both designed to study the influence of high speed on power density, efficiency and acoustics. It was found that the proposed high-speed drive enhances power density and acoustics. Moreover, the simulated efficiencies of the FTP72 drive cycle of both the medium-speed and high-speed drive were comparable. In conclusion, the power density of high-speed switched reluctance drives is comparable to that of conventional drives. Importantly the decrease in drive-cycle efficiency of high-speed switched reluctance drives is negligible. Consequently, these new drives offer a promising alternative to power future electric cars.
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A Dual-Phase-Shift Control Strategy for Dual-Active-Bridge DC-DC Converter in Wide Voltage Range
Myoungho Kim,Martin Rosekeit,Seung-Ki Sul,Rik W. A. A. De Doncker 전력전자학회 2011 ICPE(ISPE)논문집 Vol.2011 No.5
This paper analyzes the dual-phase-shift (DPS) control strategy for a dual-active-bridge (DAB) converter in whole operation range. The DPS has two degree of freedom to control the transferring power, which can improve the performance of the DAB converter than single-phase-shift (SPS) control strategy. This paper derives the reactive power, the rms and the peak current flowing on the transformer and the zero-voltage-switching (ZVS) condition according to the operating conditions. Using this analysis and simulation results, a suitable control strategy for DAB converter is obtained. Experiments are performed to verify the proposed control strategy and to compare with the conventional SPS control strategy. The experimental results show that the proposed method can enhance the overall efficiency and expand the ZVS operation range.
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