A Survey of Converter Topologies for Fuel Cells in the kW Range

Averberg, A.; Meyer, Kolja; Nguyen, Chi-Nhan; Mertens, Axel

doi:10.1109/energy.2008.4781012

Cited by 10 publications

(12 citation statements)

References 22 publications

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“…In the case of narrow-band, very-highefficiency amplifiers, 93.6% at 26.8 W has been recorded at There have been many advances in this frequency range in the intervening years. 13.56 MHz using class E [5]. The very high efficiency is a consequence of GaN HEMTs having both a lower capacitance and lower on-resistance per watt.…”

Section: Rf Power Transistorsmentioning

confidence: 99%

“…For a wide range of applications such as switching-mode power supplies, hybrid/electric vehicles, uninterruptible power supplies, motor drives, and interfacing renewable energy sources to the utility grid, dc-dc converters are essential [13]- [20]. Pulsewidth-modulated (PWM) dc-dc converters have been the most common converter schemes because of their high efficiency and small size due to the switching operation of the power devices.…”

Section: Dc-dc Convertersmentioning

confidence: 99%

See 1 more Smart Citation

Advancements at the Lower End: Advances in HF, VHF, and UHF Systems and Technology

Caverly

Breed²,

Cantrell

et al. 2015

IEEE Microwave

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Section: Rf Power Transistorsmentioning

confidence: 99%

Section: Dc-dc Convertersmentioning

confidence: 99%

Advancements at the Lower End: Advances in HF, VHF, and UHF Systems and Technology

Caverly

Breed²,

Cantrell

et al. 2015

IEEE Microwave

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“…Thus, the soft-start-up method for the buck converter cannot be suitable for the current-fed full-bridge DC-DC converter. Generally, additional start-up circuits are required in current-fed full-bridge converters, such as flyback circuits [12][13][14][15]. Based on the flyback circuits, the output voltage of the current-fed full-bridge DC-DC converter can be pre-charged, and when the output voltage is established, the current-fed full-bridge DC-DC converter can be operated in normal working conditions.…”

Section: Introductionmentioning

confidence: 99%

“…When the currents of these two inductances are different during the connecting process, the voltage spike will occur because of the current mismatch between the dc-link inductor and the leakage inductor during the turn-off actions of switches [16,17]. To deal with this issue, some snubber circuits have been proposed to suppress voltage spikes [12][13][14][15], which can reduce the voltage spikes during the connection of the dc-link inductor and the leakage inductor. Furthermore, some snubber-less schemes are presented in [16][17][18][19] based on all-active-switch topology, which cannot be used in the current-fed full-bridge DC-DC converter.…”

Section: Introductionmentioning

confidence: 99%

A Hardware-Simplified Soft-Start Scheme for Current-Fed Full-Bridge DC-DC Converter

Li,

Meng

et al. 2023

Electronics

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At present, the current-fed full-bridge DC-DC converter still faces two inherent defects, namely, the soft-start issue during the start-up process and the voltage spike issue in normal working conditions. In existing research, a large number of attempts have been reported to overcome these two inherent issues. However, the existing solutions are all based on both redundant soft-start circuits and snubber circuits, and two different circuits are required. As a result, the cost of the current-fed full-bridge DC-DC converter is high, especially because the soft-start circuits are only used during the start-up process. So, to reduce device redundancy, a hardware-simplified soft-start scheme is proposed in this paper. In the proposed scheme, the snubber circuit is reused for the soft-start process based on topology reconfiguration, avoiding additional soft-start circuits to reduce the cost of this DC-DC converter. In this proposed method, the current-fed full-bridge DC-DC converter is operated as the voltage-fed full-bridge DC-DC converter by always turning on the snubber switch during the start-up process. Then, the output capacitor can be charged by slowly increasing the output voltage of the H bridge. Then, when the output voltage is high enough, the current-fed full-bridge DC-DC converter is again operated in the current-fed mode to boost the voltage. Subsequently, the converter characters and control strategy were examined and analyzed. The experimental results verify the feasibility of the proposed hardware-simplified soft-start scheme for the current-fed full-bridge DC-DC converter.

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“…Many models of DC-DC converters are mentioned in the previous survey papers which are acceptable for fuel cell applications. From the suggested topologies in the literature [3][4][5] Isolated Full Bridge topology was most efficient and acceptable for use in fuel cells. The main advantages of isolated full bridge topology are possibility of applying soft switching techniques, reasonable device voltage ratings, less transistor voltage and current stress, possibility of connecting devices in parallel to achieve desired power levels and high efficiency and galvanic isolation.…”

Section: Introductionmentioning

confidence: 99%

Variable structure control for an isolated boost converter used in fuel cell applications

Madhavi¹,

Das²

2019

IJECE

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In recent years fuel cells have become prominent as an alternative source of energy to meet the society’s energy requirements. A control strategy derived from variable structure theory known as Sliding Mode Control (SMC) was proposed for an Isolated Boost topology which was mostly used in fuel cell systems. Converter operation and its detailed mathematical modelling are also presented. Then the converter with the control strategy suggested is simulated in MATLAB/SIMULINK and compared with other controllers. The results show that transient response of the converter is very fast and steady state error is reduced throughout the load change period with proposed control topology.

show abstract

A Survey of Converter Topologies for Fuel Cells in the kW Range

Cited by 10 publications

References 22 publications

Advancements at the Lower End: Advances in HF, VHF, and UHF Systems and Technology

Advancements at the Lower End: Advances in HF, VHF, and UHF Systems and Technology

A Hardware-Simplified Soft-Start Scheme for Current-Fed Full-Bridge DC-DC Converter

Variable structure control for an isolated boost converter used in fuel cell applications

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