The configuration of electric vehicle system using isolated DC-DC converter for a low-voltage and high-current type battery

Shin, Chang-Hyun; Kim, Doyun; Ko, An-Yeol; Won, Il-Kuen; Kim, Young-Real; Won, Chung-Yuen

doi:10.1109/icpe.2015.7168167

Cited by 10 publications

(3 citation statements)

References 6 publications

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“…Therefore, [24] and [25] show different approaches for the application of supercapacitors for an NPC and an MMC multilevel traction inverter, but a common DC-link is used and the capacitors thus require a voltage balancing algorithm. Placing several battery packages directly into the module, as suggested in [26]- [28], provides an intrinsic safety regarding the battery pack voltage level [29], [30]. However, the topic of HESS directly employed in the modules for traction applications is not covered yet.…”

Section: A Literature Reviewmentioning

confidence: 99%

Battery Loss and Stress Mitigation in a Cascaded H-Bridge Multilevel Inverter for Vehicle Traction Applications by Filter Capacitors

Kersten

Theliander

Grunditz

et al. 2019

IEEE Trans. Transp. Electrific.

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In this paper, two types of filter capacitors of varying capacity, were connected to the battery packs of a cascaded H-Bridge single-star multilevel vehicle traction inverter, and their influence on the battery losses has been analyzed. The battery and capacitor simulation models used are experimentally verified in a down-scaled system. Different capacitor configurations were simulated for four drive cycle scenarios to determine the potentials for the mitigation of current pulse stresses and battery loss reduction with respect to the added weight. By adding capacitors corresponding to a weight of 4% of the initial battery storage, the peak current is reduced by 5%-20%, depending on the operating point from DC to a few kHz, and the battery losses are reduced by 10%. In comparison, it is demonstrated that adding supercapacitors is more beneficial for lower output frequencies, while adding electrolytic capacitors is better for higher output frequencies. Furthermore, the low-order voltage harmonics of the DC-rails between the converter and battery were reduced by 10%-30% for frequencies above 9 kHz, which decreases the potential of electromagnetic disturbances. In addition, during cold battery temperatures, when it is very important to avoid heavy cyclings, the loss reduction using the capacitors was 2.5 times larger than for nominal temperature.

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Section: A Literature Reviewmentioning

confidence: 99%

Battery Loss and Stress Mitigation in a Cascaded H-Bridge Multilevel Inverter for Vehicle Traction Applications by Filter Capacitors

Kersten

Theliander

Grunditz

et al. 2019

IEEE Trans. Transp. Electrific.

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“…The positive characteristics of the boost-flyback converter allow it to be used in many applications. As in [10][11][12], due to its high voltage gain and reduced stress in the semiconductors, this topology is indicated for electric vehicle (EV) applications.…”

Section: Introductionmentioning

confidence: 99%

Boost–flyback converter with interleaved input current and output voltage series connection

Brockveld

Waltrich

2018

IET Power Electronics

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This study proposed a high-gain dc-dc converter with an interleaved current at the input stage and voltage series connection at the output stage. This converter was designed based on the boost-flyback topology, which has as main characteristic high voltage gain. Normally, the boost-flyback is designed with the low input voltage, and therefore, the current at this stage reaches high current values, limiting the converter design. Therefore, paralleling the input connection allows the current division between the semiconductors, reducing the switching stress. As part of the converter analysis, in this study, the static and the dynamic converter model are obtained to further design the converter controllers. Furthermore, simulations and experimental results for the proposed converter, operating in closed-looping control, were designed for a peak power of 1.2 kW, reaching a maximum efficiency of 97.5%. Nomenclature S 1, 2, 3 control switch D B(1, 2, 3) boost output diode D F(1, 2, 3) flyback output diode C F(1, 2, 3) flyback output capacitor C B boost output capacitor L m(1, 2, 3) magnetising inductor of coupled inductors V Lm(1, 2, 3) magnetising inductance voltage I 1, 2, 3 magnetising inductance current in the primary I 4, 5, 6 magnetising inductance current in the secondary IET Power Electron.

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“…As qualidades do conversor boost-flyback fazem com que o mesmo seja utilizado em muitas aplicações. Como apresentado em [6]- [8], devido ao seu elevado ganho de tensão e reduzido estresse nos semicondutores, o mesmo é indicado para aplicações em veículos elétricos. O conversor boost-flyback também pode ser utilizado em aplicações fotovoltaicas, conforme apresentado por [9]- [11], pois apresenta elevada eficiência e pode ser utilizado como conversor CC-CA [12].…”

Section: Introductionunclassified

Conversor CC-CC De Alto Ganho Com Divisão De Esforços De Corrente No Estágio De Entrada

Júnior¹,

Waltrich²

2017

Revista Eletrônica de Potência

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Resumo-Neste artigo é proposto um conversor CC-CC de alto ganho com divisão de esforços de corrente no estágio de entrada. Este conversor foi idealizado com base na topologia Boost-Flyback, a qual tem como principal característica alto ganho de tensão, pelo fato de possuir N saídas em série. Por apresentar alta corrente na entrada do conversor, devido à baixa tensão nesse estágio de potência, é então proposta a divisão de corrente na entrada através da técnica de interleavead, isto é, utilizar N conversores em paralelo. A conexão em paralelo na entrada possibilita a divisão de correntes entre os semicondutores, diminuindose as perdas do conversor. Para a análise do conversor é desenvolvida a modelagem estática e dinâmica obtendo a função de transferência do conversor para posterior realização do projeto de controladores. Além disso, são apresentados o projeto, as simulações e os resultados experimentais do conversor operando em malha fechada para uma potência de 1, 2 kW .

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The configuration of electric vehicle system using isolated DC-DC converter for a low-voltage and high-current type battery

Cited by 10 publications

References 6 publications

Battery Loss and Stress Mitigation in a Cascaded H-Bridge Multilevel Inverter for Vehicle Traction Applications by Filter Capacitors

Battery Loss and Stress Mitigation in a Cascaded H-Bridge Multilevel Inverter for Vehicle Traction Applications by Filter Capacitors

Boost–flyback converter with interleaved input current and output voltage series connection

Conversor CC-CC De Alto Ganho Com Divisão De Esforços De Corrente No Estágio De Entrada

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