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Your search keyword '"Andersen, Michael A. E."' showing total 10 results
Start Over Author "Andersen, Michael A. E." Journal ieee transactions on industrial electronics
10 results on '"Andersen, Michael A. E."'

2. ZVS Design in Full-SiC Three-Level Neutral-Point-Clamped DC–DC Converter Considering Quasi-Linear Output Capacitance <inline-formula><tex-math notation="LaTeX">$C_{oss}$</tex-math></inline-formula>

Author

Xiao, Yudi, Duraij, Martijn Sebastiaan, Zhang, Zhe, Zsurzsan, Tiberiu-Gabriel, and Andersen, Michael A. E.

Abstract

The three-level neutral-point-clamped (TLNPC) dc–dc converter is a popular topology for applications with high input voltage due to its simplicity of modulation, capability of withstanding high input voltage, and zero-voltage-switching (ZVS) operation. Regarding mitigating the voltage ringing on secondary side, energy recovery approach is preferred to RCD approach for the sake of high efficiency and small component counts. This article demonstrates that, using recovery approach in a Silicon Carbide (SiC)-based TLNPC dc–dc converter causes hard-switching of the outer switches due to the quasi-linear output capacitance $C_{oss}$ of SiC mosfets. The ZVS design of a full-SiC TLNPC converter must not follow conventional methods for Silicon (Si)-based converters. To address this issue, a modified design approach, which can guarantee ZVS of all switches in a full-SiC TLNPC dc–dc converter, is introduced and discussed. All of the analysis is verified on a 3 kW full-SiC TLNPC prototype, which has rated input voltage of 1.2 kV, output voltage of 600 V, and achieves ZVS in the output power range of 1.2–3 kW.

Published
2023
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10. High-Efficiency Isolated Boost DC—DC Converter for High-Power Low-Voltage Fuel-Cell Applications.

Author

Nymand, Morten and Andersen, Michael A. E.

Subjects
*LOW voltage systems, *FUEL cells, *EDDY currents (Electric), *CASCADE converters, *ELECTRIC inductance
Abstract

A new design approach achieving very high conversion efficiency in low-voltage high-power isolated boost dc-dc converters is presented. The transformer eddy-current and proximity effects are analyzed, demonstrating that an extensive interleaving of primary and secondary windings is needed to avoid high winding losses. The analysis of transformer leakage inductance reveals that extremely low leakage inductance can be achieved, allowing stored energy to be dissipated. Power MOSFETs fully rated for repetitive avalanches allow primary-side voltage clamp circuits to be eliminated. The oversizing of the primary-switch voltage rating can thus be avoided, significantly reducing switch- conduction losses. Finally, silicon carbide rectifying diodes allow fast diode turn-off, further reducing losses. Detailed test results from a 1.5-kW full-bridge boost dc-dc converter verify the theoretical analysis and demonstrate very high conversion efficiency. The efficiency at minimum input voltage and maximum power is 96.8%. The maximum efficiency of the proposed converter is 98%. [ABSTRACT FROM AUTHOR]

Published
2010
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