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Your search keyword '"Tan, Nadia Mei Lin"' showing total 22 results
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22 results on '"Tan, Nadia Mei Lin"'

10. Voltage Balancing of a 320-V, 12-F Electric Double-Layer Capacitor Bank Combined With a 10-kW Bidirectional Isolated DC--DC Converter

Author

NADIA, TAN MEI LIN, TAN, NADIA MEI LIN, inoue, shigenori, Kobayashi, Atsushi, and Akagi, Hirofumi

Subjects
Supercapacitor, Engineering, business.industry, Center tap, Electrical engineering, Energy storage, law.invention, Capacitor, law, Power engineering, Electrical and Electronic Engineering, business, Transformer, Electronic circuit, Voltage
Abstract

Electric double-layer capacitors (EDLCs) have attributes that feature high power density, quick charge/discharge time, long life cycle, and environmental friendliness. These attributes accord for increased appeal in employing the EDLCs as energy-storage devices in renewable energy systems, industrial applications, and hybrid electric vehicles as compared to other mature static energy-storage devices. This paper describes the construction of a 320-V, 12-F EDLC energy-storage bank connected to a bidirectional isolated dc-dc converter. Two types of EDLC bank configurations are considered with emphasis on their voltage-balancing circuits. Subsequently, this paper proposes a voltage-balancing circuit based on a center-tapped transformer, and includes its experimental verifications. It also discusses the charge-discharge and self-starting operation of the EDLC energy-storage system. During the charge-discharge operation, a low ripple current flowing in the EDLC bank is observed, leading to a theoretical analysis. The EDLC bank is also successfully charged to its rated voltage without any external dc charging circuit.

Published
2008

16. An energy storage system combining a 320-V, 12-F electric double layer capacitor bank with a bidirectional isolated DC-DC converter

Author

NADIA, TAN MEI LIN, TAN, NADIA MEI LIN, inoue, shigenori, Kobayashi, Atsushi, and Akagi, Hirofumi

Subjects
Electrolytic capacitor, Engineering, Power loss, business.industry, Ripple, Electronic engineering, Electrical engineering, Electric double-layer capacitor, business, Dc dc converter, Energy storage, Electronic circuit, Voltage
Abstract

This paper describes the design and construction of a 320-V, 12-F EDLC energy storage bank connected to a bidirectional isolated DC-DC converter. A trade-off between two types of EDLC bank configurations is considered with focus on voltage balancing circuits. This paper also proposes a center-tapped-transformer voltage balancing circuit for the EDLC bank, and includes its experimental verifications. Following that, the experimental charge-discharge characteristics of the EDLC energy storage system, along with a self-starting result is discussed. The power loss in the voltage balancing circuit in the charge-discharge operation is found to be negligibly small. An observed low ripple current flowing into the EDLC bank is also theoretically analyzed.

Published
2008

22. Power-Loss Breakdown of a 750-V 100-kW 20-kHz Bidirectional Isolated DC–DC Converter Using SiC-MOSFET/SBD Dual Modules.

Author

Akagi, Hirofumi, Yamagishi, Tatsuya, Tan, Nadia Mei Lin, Kinouchi, Shin-ichi, Miyazaki, Yuji, and Koyama, Masato

Subjects
CONVERTERS (Electronics), ELECTRIC power failures, METAL oxide semiconductor field-effect transistors, ELECTRIC circuits, SILICON carbide, BATTERY storage plants, WIND power
Abstract

This paper describes the design, construction, and testing of a 750-V 100-kW 20-kHz bidirectional isolated dual-active-bridge dc–dc converter using four 1.2-kV 400-A SiC-MOSFET/SBD dual modules. The maximum conversion efficiency from the dc-input to the dc-output terminals is accurately measured to be as high as 98.7% at 42-kW operation. The overall power loss at the rated-power (100 kW) operation, excluding the gate-drive and control circuit losses, is divided into the conduction and switching losses produced by the SiC modules, the iron and copper losses due to magnetic devices, and the other unknown loss. The power-loss breakdown concludes that the sum of the conduction and switching losses is about 60% of the overall power loss and that the conduction loss is nearly equal to the switching loss at the 100-kW and 20-kHz operation. [ABSTRACT FROM AUTHOR]

Published
2015
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