Performance evaluation among four types of five-level topologies using Pareto front curves

Kashihara, Yugo; Itoh, Jun‐ichi

doi:10.1109/ecce.2013.6646854

Cited by 23 publications

(8 citation statements)

References 2 publications

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“…The comparison in [15] showed that multilevel converters can achieve better efficiency and better power density in higher-power applications. Research activities related to topologies with three-level (3L) [16,17], five-level (5L) [18], and even higher-voltage-level [19] output were investigated. However, these researches did not compare different multilevel converter topologies with different voltage levels to show which topology is more favorable in certain applications.…”

Section: Corners Of Thementioning

confidence: 99%

An Extremely High Power Density Asymmetrical Back-to-Back Converter for Aerospace Motor Drive Applications

Zhang

et al. 2020

Energies

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Higher-voltage-standard and higher-power-rating aerospace power systems are being investigated intensively in the aerospace industry to address challenges in terms of improving emissions, fuel economy, and also cost. Multilevel converter topologies become attractive because of their higher efficiency under high-voltage and high-switching-frequency conditions. In this paper, an asymmetrical-voltage-level back-to-back multilevel converter is proposed, which consists of a five-level (5L) rectifier stage and a three-level (3L) inverter stage. Based on the comparison, such an asymmetrical back-to-back structure can achieve high efficiency and minimize the converter weight on both rectifier and inverter sides. A compact triple-surface-mounted heatsink structure is designed to realize high density and manufacturable thermal management. This topology and structure are evaluated with a full-rating prototype. According to the evaluation, the achieved power density is 2.61 kVA/kg, which is 30% higher than that of traditional solutions. The efficiency at the rated power of the back-to-back system is 95.8%.

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Section: Corners Of Thementioning

confidence: 99%

An Extremely High Power Density Asymmetrical Back-to-Back Converter for Aerospace Motor Drive Applications

Zhang

et al. 2020

Energies

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“…However, this also results in increased switching loss, and the heat‐sink grows in size. Thus, the optimal switching frequency was examined in terms of power density using Pareto front curves .…”

Section: Volume Evaluation Of Boost‐up Chopper and Proposed Circuitmentioning

confidence: 99%

Development of Electrolytic Capacitor Less Photovoltaic Grid Connected Inverter with Boost‐Up Type Active Buffer Circuit

Watanabe¹,

Koiwa²,

Jun-ichi³

et al. 2016

Electrical Engineering Japan

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SUMMARYThis paper proposes a configuration of a single-phase voltage source inverter that features power decoupling capability. Generally, the converter connected to a singlephase grid employs bulky dc link capacitors such as electrolytic capacitors in order to decouple the power ripple with twice the frequency of the power supply. The power ripple in the proposed circuit is compensated by an active buffer with small capacitors. In this paper, the fundamental operations of the proposed converter are confirmed by experimental results. From the experimental results, the output current total harmonic distortion (THD) is 3.51%, the ratio of the input current is 14.3%, and the output power factor is over 99%. In addition, the volume of the proposed circuit is reduced by 61% when the carrier frequency is 64 kHz compared to that with a carrier frequency of 16 kHz. Finally, from an evaluation of the power density using Pareto front curves, the proposed circuit achieves high power density in comparison with the conventional circuit. C⃝ 2016 Wiley Periodicals, Inc. Electr Eng Jpn, 196(3): 39-48, 2016; Published online in Wiley Online Library (wileyonlinelibrary.com).

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“…On the other hand, in the method (ii), it is easy to optimize the circuit because analysis time and the trial time can be reduced . For this reason, loss analysis using formulas for the multi-level converter has been discussed [12] .…”

Section: Introductionmentioning

confidence: 99%

Loss analysis and design method for high efficiency matrix converter

Koiwa¹,

Chiang²,

Itoh³

2014

2014 International Power Electronics Conference (IPEC-Hiroshima 2014 - ECCE ASIA)

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This paper discusses loss analysis formulas to achieve high efficiency and high power density for matrix converter. In this paper, the conduction loss and the switching loss of the matrix converter are derived theoretically based on virtual AC-DC-AC control method.Then, the validity of the equations is confirmed in simulation and experiment. From the experimental results, the maximum efficiency is 97.9% with 2-phase modulation at rated power (Devices: MOSFET R6046FNZ). In addition, it is confirmed that the total loss error between the calculation and experimental result is 8.65%. Finally, the relationship between the efficiency and power density is discussed by a pareto front curve. The power density is calculated from the volume of the switching device, heat sink, input inductor and filter capacitor. As the result, the efficiency and maximum power density in the matrix converter are 97.0% and 9.7 kW/dm 3 when the switching frequency is set to 85 kHz.

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Performance evaluation among four types of five-level topologies using Pareto front curves

Cited by 23 publications

References 2 publications

An Extremely High Power Density Asymmetrical Back-to-Back Converter for Aerospace Motor Drive Applications

An Extremely High Power Density Asymmetrical Back-to-Back Converter for Aerospace Motor Drive Applications

Development of Electrolytic Capacitor Less Photovoltaic Grid Connected Inverter with Boost‐Up Type Active Buffer Circuit

Loss analysis and design method for high efficiency matrix converter

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