Proposal of ultra high efficient energy conversion system (HEECS) for electric vehicle power train

Tanaka, Yukihiro; Tsuruta, Yukinori; Nozaki, Tsutomu; Kawamura, Atsuo

doi:10.1109/icmech.2015.7084063

Cited by 11 publications

(12 citation statements)

References 4 publications

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“…It can be seen from the figure that there were no converters with an efficiency of approximately 99.5% in the 100kW output range in the year 2015. The authors reported a high efficiency of 99.2% at an output voltage of 230 V and power of 3 kW using one-power supply partial boosting in 2013 [9] , and an efficiency of 99.6% at an output voltage of 400 V and power of 2.5 kW [2] , and an efficiency of 99.0% at an output voltage of 350 V and power of 20kW [3] using a two-power supply in 2015. In Fig.…”

Section: Literature Reviewmentioning

confidence: 99%

“…Figure 1 summarizes the relationship between DC-DC converter output and efficiency at the year 2015 when the project was started [2][3][4][5][6][7][8][9] . It can be seen from the figure that there were no converters with an efficiency of approximately 99.5% in the 100kW output range in the year 2015.…”

Section: Literature Reviewmentioning

confidence: 99%

“…1 it is observed that there is a limitation of efficiency in the conventional topologies in which the total power is converted by the switching devices. On the contrary, authors approach is based on the partial boosting [2,3] and it has a possibility to realize the higher efficiency, because the partial power is converted by the switching devices.…”

Section: Literature Reviewmentioning

confidence: 99%

“…Paper Reference [2] 2 Power Supply HEECS, Y. Tanaka, 2015, 99.6% (2.5kW max･rated)•• [3] 2 Power Supply HEECS, Authors, 2015, 99.0% (20kW rated)…”

Section: Literature Reviewmentioning

confidence: 99%

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Over 99.7% Efficiency at 100kW DC-DC Power Conversion using a 3.3kV SiC Device and Discussion on Device <i>dv/dt</i> Estimation

Kawamura,

Tsuruta,

Obara

2024

IEEJ Journal IA

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This paper is a re-evaluation of a completed project (High Efficiency Demonstration Grant Using High Voltage SiC Device) from the perspective of accurate efficiency measurement; additionally, this paper discusses on device dv/dt estimation. A topology called the high-efficiency energy conversion system (HEECS), which is one variety of partial boost circuit topologies, is introduced to achieve efficiency over 99.5%. The topology exhibits a very high efficiency for applications in which the output voltage variation is within a certain ratio of the rated output voltage. This paper summarizes the basic features of the topology and theoretically derives the principle of high-efficiency realization. The high efficiency is measured by the back-to-back(BTB) connection of two converters, and the efficiency and accuracy on this method are theoretically derived and confirmed using the measured data of 3.3 kV output voltage at 100 kW output. The theoretical estimation of dv/dt for a 3.3 kV SiC device to reduce dual-active-bridge(DAB) soft-switching loss is discussed. Furthermore, a trend of DC-DC conversion efficiency is shown, and we show that the partial boost topology is a promising approach for achieving high efficiency dc-dc conversion.

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Section: Literature Reviewmentioning

confidence: 99%

Section: Literature Reviewmentioning

confidence: 99%

Section: Literature Reviewmentioning

confidence: 99%

“…Paper Reference [2] 2 Power Supply HEECS, Y. Tanaka, 2015, 99.6% (2.5kW max･rated)•• [3] 2 Power Supply HEECS, Authors, 2015, 99.0% (20kW rated)…”

Section: Literature Reviewmentioning

confidence: 99%

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Over 99.7% Efficiency at 100kW DC-DC Power Conversion using a 3.3kV SiC Device and Discussion on Device <i>dv/dt</i> Estimation

Kawamura,

Tsuruta,

Obara

2024

IEEJ Journal IA

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“…On the other hand, Type II step-down stages have received less attention for EV charging [30], [31]. The configuration in Fig.…”

Section: Topology Descriptionmentioning

confidence: 99%

Partial-Power Converter Topology of Type II for Efficient Electric Vehicle Fast Charging

Rivera

Rojas

Kouro

et al. 2022

IEEE J. Emerg. Sel. Topics Power Electron.

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Estimation of state of charge and state of health of batteries using hybrid method and recurrent neural network

Sattianadan,

Sharma,

Fernandez

et al. 2024

International Conference on Recent Innovations in Science and Technology (Rist2022)

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Proposal of ultra high efficient energy conversion system (HEECS) for electric vehicle power train

Cited by 11 publications

References 4 publications

Over 99.7% Efficiency at 100kW DC-DC Power Conversion using a 3.3kV SiC Device and Discussion on Device <i>dv/dt</i> Estimation

Over 99.7% Efficiency at 100kW DC-DC Power Conversion using a 3.3kV SiC Device and Discussion on Device <i>dv/dt</i> Estimation

Partial-Power Converter Topology of Type II for Efficient Electric Vehicle Fast Charging

Estimation of state of charge and state of health of batteries using hybrid method and recurrent neural network

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